#define MyPrivateTableViewDataType #"MyPrivateTableViewDataType"
//add line in your awakeFormNib method
[self.tableView registerForDraggedTypes:[NSArray arrayWithObject:MyPrivateTableViewDataType]
// This method is called
-(BOOL)tableView:(NSTableView *)tv writeRowsWithIndexes:(NSIndexSet *)rowIndexes toPasteboard:(NSPasteboard*)pboard {
// Copy the row numbers to the pasteboard.
NSData *zNSIndexSetData = [NSKeyedArchiver archivedDataWithRootObject:rowIndexes];
[pboard declareTypes:[NSArray arrayWithObject:MyPrivateTableViewDataType] owner:self];
[pboard setData:zNSIndexSetData forType:MyPrivateTableViewDataType];
return YES;
}
***following methods are not called***
- (NSDragOperation)tableView:(NSTableView*)tv validateDrop:(id )info proposedRow:(NSInteger)row proposedDropOperation:(NSTableViewDropOperation)op {
// Add code here to validate the drop
return NSDragOperationEvery;
}
- (BOOL)tableView:(NSTableView *)aTableView acceptDrop:(id )info row:(NSInteger)row dropOperation:(NSTableViewDropOperation)operation {
NSPasteboard* pboard = [info draggingPasteboard];
NSData* rowData = [pboard dataForType:MyPrivateTableViewDataType];
NSIndexSet* rowIndexes = [NSKeyedUnarchiver unarchiveObjectWithData:rowData];
NSInteger dragRow = [rowIndexes firstIndex];
if (dragRow < row) {
[model insertObject:[model objectAtIndex:dragRow] atIndex:row];
[model removeObjectAtIndex:dragRow];
[aTableView noteNumberOfRowsChanged];
[aTableView moveRowAtIndex:dragRow toIndex:row-1];
}else {
ModelObj *obj = [model objectAtIndex:dragRow];
[model removeObjectAtIndex:dragRow];
[model insertObject:obj atIndex:row];
[aTableView noteNumberOfRowsChanged];
[aTableView moveRowAtIndex:dragRow toIndex:row];
}
return YES;
}
My NSTableView have custom tableViewCell , I registered DraggedTypes. i set delegate and datasource of table. but Out of 3 methods only first method -(BOOL)tableView:(NSTableView *)tv writeRowsWithIndexes:(NSIndexSet *)rowIndexes toPasteboard:(NSPasteboard*)pboard is called.
why other methods are not called.
Related
I've been following a tutorial teaching how to make a tableview with a search bar. I got this to work without problems, but now I learned to make the same tableview but instead of local arrays, I've been getting my data from parse as PFObjects.
I then tried to take the search bar and implant it in my new tableview which uses parse. I can't get this to work. Following the tutorial with the search bar they are using simple arrays stored locally..
Can anyone point me in the right direction of how to use a search bar in a tableview that gets its data from a parse database?
This is my code that works with my tableview that does NOT use parse.
#implementation RecipeBookViewController {
NSArray *recipes;
NSArray *searchResults;
}
#synthesize tableView = _tableView;
- (void)viewDidLoad
{
[super viewDidLoad];
// Initialize table data
recipes = [NSArray arrayWithObjects:#"Egg Benedict", #"Mushroom Risotto",
#"Full Breakfast", #"Hamburger", #"Ham and Egg Sandwich", #"Creme Brelee",
nil];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:
(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:
(NSInteger)section
{
if (tableView == self.searchDisplayController.searchResultsTableView) {
return [searchResults count];
} else {
return [recipes count];
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:
(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"RecipeCell";
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:simpleTableIdentifier];
}
if (tableView == self.searchDisplayController.searchResultsTableView) {
cell.textLabel.text = [searchResults objectAtIndex:indexPath.row];
} else {
cell.textLabel.text = [recipes objectAtIndex:indexPath.row];
}
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:
(NSIndexPath
- *)indexPath
{
if (tableView == self.searchDisplayController.searchResultsTableView) {
[self performSegueWithIdentifier: #"showRecipeDetail" sender: self];
}
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"showRecipeDetail"]) {
RecipeDetailViewController *destViewController =
segue.destinationViewController;
NSIndexPath *indexPath = nil;
if ([self.searchDisplayController isActive]) {
indexPath = [self.searchDisplayController.searchResultsTableView
indexPathForSelectedRow];
destViewController.recipeName = [searchResults
objectAtIndex:indexPath.row];
} else {
indexPath = [self.tableView indexPathForSelectedRow];
destViewController.recipeName = [recipes objectAtIndex:indexPath.row];
}
}
}
- (void)filterContentForSearchText:(NSString*)searchText scope:
(NSString*)scope
{
NSPredicate *resultPredicate = [NSPredicate
predicateWithFormat:#"SELF contains[cd] %#",
searchText];
searchResults = [recipes filteredArrayUsingPredicate:resultPredicate];
}
#pragma mark - UISearchDisplayController delegate methods
-(BOOL)searchDisplayController:(UISearchDisplayController *)controller
shouldReloadTableForSearchString:(NSString *)searchString
{
[self filterContentForSearchText:searchString
scope:[[self.searchDisplayController.searchBar
scopeButtonTitles]
objectAtIndex:
[self.searchDisplayController.searchBar
selectedScopeButtonIndex]]];
return YES;
}
And this is my tableview which get its data from my parse database:
#implementation RecipeBookViewController {
}
- (id)initWithCoder:(NSCoder *)aCoder
{
self = [super initWithCoder:aCoder];
if (self) {
// Custom the table
// The className to query on
self.parseClassName = #"Recipe";
// The key of the PFObject to display in the label of the default cell
style
self.textKey = #"name";
// Whether the built-in pull-to-refresh is enabled
self.pullToRefreshEnabled = YES;
// Whether the built-in pagination is enabled
self.paginationEnabled = NO;
// The number of objects to show per page
//self.objectsPerPage = 10;
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(refreshTable:)
name:#"refreshTable"
object:nil];
}
- (void)refreshTable:(NSNotification *) notification
{
// Reload the recipes
[self loadObjects];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
[[NSNotificationCenter defaultCenter] removeObserver:self name:#"refreshTable"
object:nil];
}
- (BOOL)shouldAutorotateToInterfaceOrientation:
(UIInterfaceOrientation)interfaceOrientation
{
return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}
- (PFQuery *)queryForTable
{
PFQuery *query = [PFQuery queryWithClassName:self.parseClassName];
// If no objects are loaded in memory, we look to the cache first
to fill the table
// and then subsequently do a query against the network.
/* if ([self.objects count] == 0) {
query.cachePolicy = kPFCachePolicyCacheThenNetwork;
}*/
// [query orderByAscending:#"name"];
return query;
}
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:
(NSIndexPath *)indexPath object:(PFObject *)object
{
static NSString *simpleTableIdentifier = #"RecipeCell";
UITableViewCell *cell = [tableView
dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:simpleTableIdentifier];
}
// Configure the cell
PFFile *thumbnail = [object objectForKey:#"imageFile"];
PFImageView *thumbnailImageView = (PFImageView*)[cell viewWithTag:100];
thumbnailImageView.image = [UIImage imageNamed:#"placeholder.jpg"];
thumbnailImageView.file = thumbnail;
[thumbnailImageView loadInBackground];
UILabel *nameLabel = (UILabel*) [cell viewWithTag:101];
nameLabel.text = [object objectForKey:#"name"];
UILabel *prepTimeLabel = (UILabel*) [cell viewWithTag:102];
prepTimeLabel.text = [object objectForKey:#"prepTime"];
return cell;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:
(UITableViewCellEditingStyle)editingStyle
forRowAtIndexPath:(NSIndexPath*) indexPath
{
// Remove the row from data model
PFObject *object = [self.objects objectAtIndex:indexPath.row];
[object deleteInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
[self refreshTable:nil];
}];
}
- (void) objectsDidLoad:(NSError *)error
{
[super objectsDidLoad:error];
NSLog(#"error: %#", [error localizedDescription]);
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"showRecipeDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
RecipeDetailViewController *destViewController =
segue.destinationViewController;
PFObject *object = [self.objects objectAtIndex:indexPath.row];
Recipe *recipe = [[Recipe alloc] init];
recipe.name = [object objectForKey:#"name"];
recipe.imageFile = [object objectForKey:#"imageFile"];
recipe.prepTime = [object objectForKey:#"prepTime"];
recipe.ingredients = [object objectForKey:#"ingredients"];
destViewController.recipe = recipe;
}
}
I am using parse as back-end for my app. I have found a few different methods to implement searchbar feature using a Parse tableview. This idea I found from Parse archives shows all objects on initial view and refresh, but when I search it does not return the correct results. If I type one letter "a" it returns some objects containing "a" but if I type more letters or and actual word that I know should be found it returns a blank table. It is also giving a warning when searching: A long-running Parse operation is being executed on the main thread. I have been working and researching this for a few weeks and can't get past this point. See code for implementation file.
#import "RecipeBookViewController.h"
#import "SearchedResultCell.h"
#import "RecipeDetailViewController.h"
#import "HotelViewController.h"
#import "Recipe.h"
static NSString *const NothingFoundCellIdentifier = #"NothingFoundCell";
#interface RecipeBookViewController ()
#end
#implementation RecipeBookViewController {
}
#synthesize searchedBar;
#synthesize searchResults;
#synthesize recipesTable;
- (id)initWithCoder:(NSCoder *)aCoder
{
self = [super initWithCoder:aCoder];
if (self) {
// Custom the table
// The className to query on
self.parseClassName = #"Recipe";
// The key of the PFObject to display in the label of the default cell style
self.textKey = #"name";
// Whether the built-in pull-to-refresh is enabled
self.pullToRefreshEnabled = YES;
// Whether the built-in pagination is enabled
self.paginationEnabled = NO;
// The number of objects to show per page
//self.objectsPerPage = 10;
}
return self;
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
#pragma mark - UIViewController
- (void)viewDidLoad
{
[super viewDidLoad];
UINib *cellNib = [UINib nibWithNibName:NothingFoundCellIdentifier bundle:nil];
[self.tableView registerNib:cellNib forCellReuseIdentifier:NothingFoundCellIdentifier];
[self.searchedBar becomeFirstResponder];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(refreshTable:)
name:#"refreshTable"
object:nil];
}
- (void)refreshTable:(NSNotification *) notification
{
// Reload the recipes
[self loadObjects];
}
- (void)viewDidUnload
{
[super viewDidUnload];
// Release any retained subviews of the main view.
[[NSNotificationCenter defaultCenter] removeObserver:self name:#"refreshTable" object:nil];
}
#pragma mark - UISearchBarDelegate
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
{
[searchResults removeAllObjects];
[self.searchedBar resignFirstResponder];
searchResults = [NSMutableArray arrayWithCapacity:10];
//#warning Put your ClassName here
PFQuery *query = [PFQuery queryWithClassName:#"Recipe"];
//#warning put key that you want to search here
[query whereKey:#"name" containsString:searchedBar.text];
NSArray *results = [query findObjects];
[searchResults addObjectsFromArray:results];
//#warning put your key here
[query orderByAscending:#"name"];
//[self queryForTable];
[self loadObjects];
}
#pragma mark - PFQueryTableViewController
- (void)objectsWillLoad {
[super objectsWillLoad];
// This method is called before a PFQuery is fired to get more objects
}
- (void) objectsDidLoad:(NSError *)error
{
[super objectsDidLoad:error];
NSLog(#"error: %#", [error localizedDescription]);
}
#pragma mark - Query
- (PFQuery *)queryForTable
{
PFQuery *query;
if (self.searchResults == 0) {
query = [PFQuery queryWithClassName:self.parseClassName];
} else {
query = [PFQuery queryWithClassName:self.parseClassName];
NSString *searchThis = [searchedBar.text lowercaseString];
//#warning key you wanted to search here
[query whereKeyExists:#"name"];
[query whereKey:#"name" containsString:searchThis];
}
[query orderByAscending:#"name"];
// If Pull To Refresh is enabled, query against the network by default.
if (self.pullToRefreshEnabled) {
query.cachePolicy = kPFCachePolicyNetworkOnly;
}
// If no objects are loaded in memory, we look to the cache first to fill the table
// and then subsequently do a query against the network.
if (self.objects.count == 0) {
query.cachePolicy = kPFCachePolicyCacheThenNetwork;
}
return query;
}
/*
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection: (NSInteger)section
{
if (searchResults == nil) {
return 0;
} else if ([searchResults count] == 0) {
return 1;
} else {
return [self.objects count];
}
}
*/
// Override to customize the look of a cell representing an object. The default is to display
// a UITableViewCellStyleDefault style cell with the label being the first key in the object.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath: (NSIndexPath *)indexPath object:(PFObject *)object
{
static NSString *simpleTableIdentifier = #"RecipeCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
// Configure the cell
PFFile *thumbnail = [object objectForKey:#"imageFile"];
PFImageView *thumbnailImageView = (PFImageView*)[cell viewWithTag:100];
thumbnailImageView.image = [UIImage imageNamed:#"recipeBoxImage2.jpg"];
thumbnailImageView.file = thumbnail;
[thumbnailImageView loadInBackground];
UILabel *nameLabel = (UILabel*) [cell viewWithTag:101];
nameLabel.text = [object objectForKey:#"name"];
UILabel *prepTimeLabel = (UILabel*) [cell viewWithTag:102];
prepTimeLabel.text = [object objectForKey:#"prepTime"];
static NSString *LoadMoreCellIdentifier = #"LoadMoreCell";
UITableViewCell *loadcell = [self.tableView dequeueReusableCellWithIdentifier:LoadMoreCellIdentifier];
if (!cell) {
loadcell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:LoadMoreCellIdentifier];
}
return cell;
}
- (void)configureSearchResult:(SearchedResultCell *)cell atIndexPath: (NSIndexPath *)indexPath object:(PFObject *)object
{
static NSString *simpleTableIdentifier = #"RecipeCell";
SearchedResultCell *searchcell = [self.tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (searchcell == nil) {
searchcell = [[SearchedResultCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:simpleTableIdentifier];
}
// Configure the cell
PFFile *thumbnail = [object objectForKey:#"imageFile"];
PFImageView *thumbnailImageView = (PFImageView*)[cell viewWithTag:100];
thumbnailImageView.image = [UIImage imageNamed:#"recipeBoxImage2.jpg"];
thumbnailImageView.file = thumbnail;
[thumbnailImageView loadInBackground];
UILabel *nameLabel = (UILabel*) [cell viewWithTag:101];
nameLabel.text = [object objectForKey:#"name"];
UILabel *prepTimeLabel = (UILabel*) [cell viewWithTag:102];
prepTimeLabel.text = [object objectForKey:#"prepTime"];
}
// Set CellForRowAtIndexPath
- (UITableViewCell *)searchtableView:(UITableView *)searchtableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{
static NSString *CellIdentifier = #"SearchResultCell";
//Custom Cell
SearchedResultCell *cell = [searchtableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[SearchedResultCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
if ([searchResults count] == 0) {
//cell.mainTitle.text = #"Nothing Found";
return [self.tableView dequeueReusableCellWithIdentifier:NothingFoundCellIdentifier];
} else {
//#warning put your ClassName here
PFObject *object = [PFObject objectWithClassName:#"Recipe"];
object = [searchResults objectAtIndex:indexPath.row];
[self configureSearchResult:cell atIndexPath:indexPath object:object];
//[self configureSearchResult:cell atIndexPath:indexPath object:object];
return cell;
}
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForNextPageAtIndexPath:(NSIndexPath *)indexPath {
static NSString *LoadMoreCellIdentifier = #"LoadMoreCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:LoadMoreCellIdentifier];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:LoadMoreCellIdentifier];
}
return cell;
}
//// Set TableView Height for Load Next Page
//- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath: (NSIndexPath *)indexPath {
// if([self.objects count] == indexPath.row) {
// // Load More Cell Height
// return 60.0;
// } else {
// return 80.0;
// }
//}
#pragma mark - UITableViewDelegate
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
[searchedBar resignFirstResponder];
if ([self.objects count] == indexPath.row) {
[self loadNextPage];
} else {
PFObject *photo = [self.objects objectAtIndex:indexPath.row];
NSLog(#"%#", photo);
// Do something you want after selected the cell
}
}
#pragma mark - UIScrollViewDelegate
- (void)scrollViewWillBeginDragging:(UIScrollView *)scrollView {
[self.searchedBar resignFirstResponder];
}
//- (void)tableView:(UITableView *)tableView commitEditingStyle: (UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
//{
// // Remove the row from data model
// PFObject *object = [self.objects objectAtIndex:indexPath.row];
// [object deleteInBackgroundWithBlock:^(BOOL succeeded, NSError *error) {
// [self refreshTable:nil];
// }];
//}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"showRecipeDetail"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
RecipeDetailViewController *destViewController = segue.destinationViewController;
PFObject *object = [self.objects objectAtIndex:indexPath.row];
Recipe *recipe = [[Recipe alloc] init];
recipe.name = [object objectForKey:#"name"];
recipe.imageFile = [object objectForKey:#"imageFile"];
recipe.prepTime = [object objectForKey:#"prepTime"];
recipe.ingredients = [object objectForKey:#"ingredients"];
recipe.instructions = [object objectForKey:#"instructions"];
recipe.servings = [object objectForKey:#"servings"];
recipe.hotelSite = [object objectForKey:#"hotelSite"];
recipe.recipeType = [object objectForKey:#"recipeType"];
destViewController.recipe = recipe;
}
}
#end
found this - hope it helps others - credit to Bizzi-Body
https://github.com/Bizzi-Body/ParseTutorial-Part-2
//
// GourmetChefViewController.m
//
// Created by RedMac on 3/19/15.
//
#import "RecipeBookViewController.h"
#interface RecipeBookViewController ()
{
NSMutableArray *totalStrings;
NSMutableArray *filteredStrings;
BOOL isFiltered;
}
#end
#implementation RecipeBookViewController
#pragma mark -
#pragma mark UIViewController
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
[super viewDidLoad];
self.mySearchBar.delegate =self;
self.myTableView.delegate = self;
self.myTableView.dataSource=self;
[self retrieveFromParse];
}
- (void) retrieveFromParse {
PFQuery *retrieveRecipes = [PFQuery queryWithClassName:#"Recipe"];
[retrieveRecipes whereKeyExists:#"name"];
[retrieveRecipes findObjectsInBackgroundWithBlock:^(NSArray *objects, NSError *error) {
if (!error) {
NSLog(#"%#", objects);
totalStrings = [[NSMutableArray alloc] initWithArray:objects];
}
[self.myTableView reloadData];
}];
}
-(NSInteger) numberOfSectionsInTableView:(UITableView *)tableView{
return 1;
}
-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *) searchText{
if (searchText.length ==0){
isFiltered =NO;}
else{
isFiltered =YES;
filteredStrings=[[NSMutableArray alloc]init];
for(PFObject *element in totalStrings) {
NSString * str = [element objectForKey:#"name"];
NSLog(#"%#", NSStringFromClass([element class])); // you thought that totalStrings
// contained NSString objects,
// but it contains PFObjects.
NSRange stringRange =[str rangeOfString:searchText options:NSCaseInsensitiveSearch];
if (stringRange.location !=NSNotFound) {
// you need to add the PFObject back to make your cellForRowAtIndexPath: method
// work.
[filteredStrings addObject:element]; // used to be :str
}
}
}
[self.myTableView reloadData];
}
//table view datasource and delegate method.....
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger) section
{
if (isFiltered){
return [filteredStrings count];
}return [totalStrings count];
}
-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *CellIdentifier = #"RecipeCell";
UITableViewCell *cell= [tableView dequeueReusableCellWithIdentifier: CellIdentifier];
if (!cell){
cell=[[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
if(!isFiltered){
PFObject *tempObject =[totalStrings objectAtIndex: indexPath.row];
cell.textLabel.text = [tempObject objectForKey:#"name"];
}
else
{
PFObject *tempObject2 =[filteredStrings objectAtIndex: indexPath.row];
cell.textLabel.text =[tempObject2 objectForKey:#"name"];
}
return cell;
}
- (void)didReceiveMemoryWarning {
// Releases the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
#end
The following lines of code shown below are my current tableview settings. What i would like to achieve is what's seen on the image below.
1) if count is 4 when user scrolls Down show a Activity Indicator and Make a request using the next value shown on the JSON Below.
2) Reload the Table
3) Show No more results if count is empty.
Note: I am new on Objective-C so I will appreciate your guidance on this subject since all searches I have done were not successful on what I am looking to achieve since all of them are based on a table already loaded and not based on a Search Result.
As shown on the Image Below is a reference what i want to achieve.
JSON RESPONSE FROM SEARCH
{
"count": 4,
"next": "http://api.domain.com/user-search/?page=2&subject=culture",
"previous": null,
"results": [
{
"name": "Guillermo Davila",
"nick": "guillermo",
"avatar_s": "https://pbs.twimg.com/profile_images/2213685686/image.jpg",
"user_rate": "$10/h",
"id": 3,
"subjects": "Culture and 1 other subject",
"bio": "I'm a nice person"
},
{
"name": "Frank Smith",
"nick": "fsmith",
"avatar_s": "https://pbs.twimg.com/profile_images/2444486/image.jpg",
"user_rate": "$14/h",
"id": 3,
"subjects": "Culture and 1 other subject",
"bio": "I'm a nice person 2"
}
]
}
And here is my UserTableviewController.h
//
// UserTableViewController.m
// mobile-app
//
// Created by eddwinpaz on 5/18/14.
// Copyright (c) 2014 eddwinpaz. All rights reserved.
//
#import "UserTableViewController.h"
#import "CustomTableCell.h"
#import "UserDetailViewController.h"
#import "AFNetworking.h"
#import "MBProgressHUD.h"
#import "SimpleAudioPlayer.h"
#interface UserTableViewController ()
#end
#implementation UserTableViewController
{
// JSON Request
NSMutableArray *myObject;
// A Dictionary Object
NSDictionary *dictionary;
NSString *name;
NSString *subject;
NSString *avatar;
NSString *rate;
NSString *bio;
NSString *nick;
}
- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
//[self fetch_tutors]; // Get tutors Ordered By Karma DESC
// Uncomment the following line to preserve selection between presentations.
// self.clearsSelectionOnViewWillAppear = NO;
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
/*
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
// Return the number of sections.
return 0;
} */
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
// Return the number of rows in the section.
return myObject.count; // This is old 100% working code
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"CustomTableCell";
CustomTableCell *cell = (CustomTableCell *)[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[CustomTableCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
dictionary = [myObject objectAtIndex:indexPath.row];
cell.labelName.text = [dictionary objectForKey:#"name"];
cell.labelBio.text = [dictionary objectForKey:#"bio"];
cell.labelSubjects.text = [dictionary objectForKey:#"subject"];
cell.imageAvatar.image = [UIImage imageWithData:[NSData dataWithContentsOfURL:[NSURL URLWithString:[dictionary objectForKey:#"avatar"]]]];
cell.imageAvatar.clipsToBounds = YES;
cell.imageAvatar.layer.cornerRadius = cell.imageAvatar.frame.size.width / 2;
cell.labelRate.text = [dictionary objectForKey:#"rate"];
cell.labelRate.layer.cornerRadius = 5;
[SimpleAudioPlayer playFile:#"upvote.wav"];
return cell;
}
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString:#"showUserDetail"])
{
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
UserDetailViewController *destViewController = segue.destinationViewController;
NSDictionary *dict = [myObject objectAtIndex:indexPath.row];
destViewController.http_nick = [dict valueForKey:#"nick"];
destViewController.labelName = [dict valueForKey:#"name"];
NSLog(#" Username Sent--->%#", [dict valueForKey:#"nick"]);
NSLog(#" name Sent--->%#", [dict valueForKey:#"name"]);
}
}
-(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
{
NSString *searchTerm = searchBar.text;
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
hud.mode = MBProgressHUDModeIndeterminate;
hud.labelText = #"Searching Tutors";
[hud show:YES];
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];
NSString *url = [NSString stringWithFormat:#"http://api.domain.com/user-search/?subject=%#",searchTerm];
[manager GET:url parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject)
{
NSLog(#"JSON: %#", responseObject);
[hud hide:YES];
int count_total = [[responseObject objectForKey:#"count"] intValue];
if (count_total == 0) {
[myObject removeAllObjects];
NSLog(#"Count is --->0");
}
else {
myObject = [[NSMutableArray alloc] init];
name = #"name";
subject = #"subject";
avatar = #"avatar";
rate = #"rate";
bio = #"bio";
nick = #"nick";
for (NSDictionary *dataDict in [responseObject objectForKey:#"results"])
{
NSString *name_data = [dataDict objectForKey:#"name"];
NSString *subject_data = [dataDict objectForKey:#"subjects"];
NSString *avatar_data = [dataDict objectForKey:#"avatar_s"];
NSString *rate_data = [dataDict objectForKey:#"user_rate"];
NSString *bio_data = [dataDict objectForKey:#"bio"];
NSString *nick_data = [dataDict objectForKey:#"nick"];
NSLog(#"name: %#", name_data);
NSLog(#"subjects: %#",subject_data);
NSLog(#"avatar_s: %#", avatar_data);
NSLog(#"user_rate: %#",rate_data);
NSLog(#"bio: %#",bio_data);
NSLog(#"nick: %#",nick_data);
dictionary = [NSDictionary dictionaryWithObjectsAndKeys:
name_data,name,
subject_data,subject,
avatar_data,avatar,
rate_data,rate,
bio_data, bio,
nick_data, nick, nil];
[myObject addObject:dictionary];
}
}
[self.searchBar endEditing:YES];
[self.searchBar setShowsCancelButton:NO animated:YES];
[self.searchBar sizeToFit];
[self.tableView reloadData];
} failure:^(AFHTTPRequestOperation *operation, NSError *error)
{
NSLog(#"Error: %#", error);
[hud hide:YES];
}];
}
- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar
{
[searchBar sizeToFit];
[searchBar setShowsCancelButton:YES animated:YES];
return YES;
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
[self.searchBar endEditing:YES];
[searchBar setShowsCancelButton:NO animated:YES];
self.searchBar.text = nil;
}
/*
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
if ([segue.identifier isEqualToString:#"userDetailView"]) {
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
UserDetailViewController *destViewController = segue.destinationViewController;
destViewController.labelName = [myObject objectAtIndex:indexPath.row];
}
} */
/*
// Override to support conditional editing of the table view.
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the specified item to be editable.
return YES;
}
*/
/*
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
if (editingStyle == UITableViewCellEditingStyleDelete) {
// Delete the row from the data source
[tableView deleteRowsAtIndexPaths:#[indexPath] withRowAnimation:UITableViewRowAnimationFade];
} else if (editingStyle == UITableViewCellEditingStyleInsert) {
// Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
}
}
*/
/*
// Override to support rearranging the table view.
- (void)tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)fromIndexPath toIndexPath:(NSIndexPath *)toIndexPath
{
}
*/
/*
// Override to support conditional rearranging of the table view.
- (BOOL)tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath
{
// Return NO if you do not want the item to be re-orderable.
return YES;
}
*/
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using [segue destinationViewController].
// Pass the selected object to the new view controller.
}
*/
#end
One way to achieve it is,
Return the numberOfCells as one more than the data array
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
return myDataArray +1 ; //myDataArray is the data and One more cell for the last cell (10 out of 46 results cell)
}
In cellForRowAtIndexPath, if your IndexPath.row == myDataArray.count (ie., Last Row) Create a custom cell which looks as in the picture and return the custom cell.
In - (void)tableView:(UITableView *)tableView didEndDisplayingCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath*)indexPath, If the indexPath corresponds to last cell, then Start Request for page 2, once the results are fetched, update the myDataArray and reload the table.
I am trying to create a custom popup menu in a tableview. As I understand it I can should be able to do so by calling the [NSPopupButtonCell setView:myView] method passing in the custom view (which is just a NSView with an NSOutlineView in it).
So I have created a NSPopupButtonCell subclass and during initialisation I call setView and pass in the custom outline view..
EDIT
In IB I have set the table columns cell to a Popup Button Cell and set
the class to my custom LookupPopupButtonCell.
I still don't get my custom view displaying but my custom classes
initialisation methods appear to be getting called.
I have since replaced this approach with using a NSTableViewDelegate method dataCellForTableColumn. Now the popup shows my custom tableView.
Still no joy in getting the NSOutlineViewDelegate methods called though.
EDIT
OK I have managed to get things working using a NSPopupButton on a view. delegate works find and table view displays things fine. Seems that using NSPopupButtonCell the delegate methods never get called.
#implementation LookupPopupButtonCell
- (id)init
{
LOG(#"init called");
self = [super init];
if (self) {
[self initialise];
}
return self;
}
- (void)initialise
{
LOG(#"initialise called");
[self setFont:[NSFont fontWithName:#"System Regular" size:11]];
[self setBordered:NO];
[self setBezeled:NO];
// Set the Task Lookup Popup Menu
NSMenu *newLookupMenu = [[NSMenu allocWithZone:[NSMenu menuZone]] initWithTitle:#"Custom"];
NSMenuItem *newItem = [[NSMenuItem allocWithZone:[NSMenu menuZone]] initWithTitle:#"Lookup" action:nil keyEquivalent:#""];
[newItem setEnabled:YES];
TaskLookupViewController *viewController = [[TaskLookupViewController alloc] initWithNibName:#"TaskLookupViewController" bundle:nil];
[newItem setView:[viewController view]];
[newLookupMenu addItem:newItem];
[newItem release];
[self setMenu:newLookupMenu];
}
#end
#implementation TaskLookupViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Initialization code here.
[self initialise];
}
return self;
}
- (void)awakeFromNib{
LOG(#"awakeFromNib called...");
[self viewDidLoad];
}
- (void)viewDidLoad {
FLOG(#"viewDidLoad called for %#", self);
/*
FLOG(#" _outlineView is %#", _outlineView);
FLOG(#" _outlineView is %#", [_outlineView identifier]);
FLOG(#" _outlineView delegate is %#", [_outlineView delegate]);
FLOG(#" _outlineView dataSource is %#", [_outlineView dataSource]);
*/
[_outlineView setDataSource:self];
[_outlineView setDelegate:self];
[_outlineView reloadData];
[_outlineView selectRowIndexes:[NSIndexSet indexSetWithIndex:0] byExtendingSelection:NO];
[_outlineView setNeedsDisplay];
[_outlineView selectRowIndexes:[NSIndexSet indexSetWithIndex:2] byExtendingSelection:NO];
/*
FLOG(#" _outlineView delegate is %#", [_outlineView delegate]);
FLOG(#" _outlineView dataSource is %#", [_outlineView dataSource]);
*/
//NSTableColumn *tableColumn = [[_outlineView tableColumns] objectAtIndex:0];
//LOG(#" setting bindings");
//[tableColumn bind: #"value" toObject: _treeController withKeyPath: #"arrangedObjects.displayName" options: nil];
}
- (void)initialise {
LOG(#"initialise called");
_topLevelItems = [[NSArray arrayWithObjects:#"Project", #"Tasks and Deliverables", #"Finance", nil] retain];
_childrenDictionary = [NSMutableDictionary new];
[_childrenDictionary setObject:[NSArray arrayWithObjects:#"Scope", nil] forKey:#"Project"];
//[_childrenDictionary setObject:[NSArray arrayWithObjects:#"Issues", #"Risks", nil] forKey:#"Quality"];
[_childrenDictionary setObject:[NSArray arrayWithObjects:#"WBS", #"Functions", nil] forKey:#"Tasks and Deliverables"];
[_childrenDictionary setObject:[NSArray arrayWithObjects:#"Expenses", #"Ongoing Costs", #"Timesheets", nil] forKey:#"Finance"];
//[_childrenDictionary setObject:[NSArray arrayWithObjects:#"Applications", #"Interfaces", nil] forKey:#"IT Systems"];
//[_childrenDictionary setObject:[NSArray arrayWithObjects:#"People", #"Setup", nil] forKey:#"Administration"];
}
- (NSArray *)_childrenForItem:(id)item {
LOG(#"_childrenForItem called");
NSArray *children;
if (item == nil) {
children = _topLevelItems;
} else {
children = [_childrenDictionary objectForKey:item];
}
//FLOG(#" children are %#", children);
return children;
}
#end
#implementation TaskLookupViewController (NSOutlineViewDataSource)
- (void)outlineViewSelectionDidChange:(NSNotification *)notification {
LOG(#"outlineViewSelectionDidChange: called");
if ([_outlineView selectedRow] != -1) {
NSObject *item = [_outlineView itemAtRow:[_outlineView selectedRow]];
if ([_outlineView parentForItem:item] != nil) {
// Only change things for non-root items (root items can be selected, but are ignored)
FLOG(#" selected item is %#", item);
}
}
}
- (id)outlineView:(NSOutlineView *)outlineView child:(NSInteger)index ofItem:(id)item {
FLOG(#"outlineView:child:ofItem: called for item %#", item);
return [[self _childrenForItem:item] objectAtIndex:index];
}
- (BOOL)outlineView:(NSOutlineView *)outlineView isItemExpandable:(id)item {
LOG(#"outlineView:isItemExpandable: called");
if ([outlineView parentForItem:item] == nil) {
return YES;
} else {
return YES;
}
}
- (NSInteger) outlineView:(NSOutlineView *)outlineView numberOfChildrenOfItem:(id)item {
LOG(#"outlineView:numberOfChildrenOfItem: called");
FLOG(#" children count is %d", [[self _childrenForItem:item] count]);
return [[self _childrenForItem:item] count];
}
#end
#implementation TaskLookupViewController (NSOutlineViewDelegate)
- (BOOL)outlineView:(NSOutlineView *)outlineView isGroupItem:(id)item {
LOG(#"outlineView:isGroupItem: called");
return [_topLevelItems containsObject:item];
}
- (void)outlineView:(NSOutlineView *)outlineView willDisplayCell:(id)cell forTableColumn:(NSTableColumn *)tableColumn item:(id)item
{
LOG(#"willDisplayCell called");
[cell setTitle:#"Cell Title"];
}
- (NSView *)outlineView:(NSOutlineView *)outlineView viewForTableColumn:(NSTableColumn *)tableColumn item:(id)item {
LOG(#"outlineView:viewForTableColumn called");
// We just return a regular text view.
if ([_topLevelItems containsObject:item]) {
NSTextField *result = [outlineView makeViewWithIdentifier:#"HeaderTextField" owner:self];
// Uppercase the string value, but don't set anything else. NSOutlineView automatically applies attributes as necessary
NSString *value = [item uppercaseString];
[result setStringValue:value];
return result;
} else {
NSTextField *result = [outlineView makeViewWithIdentifier:#"ItemTextField" owner:self];
[result setStringValue:value];
return result;
}
}
- (BOOL)outlineView:(NSOutlineView *)outlineView shouldExpandItem:(id)item;
{
LOG(#"outlineView:shouldExpandItem: called");
return YES;
}
- (BOOL)outlineView:(NSOutlineView *)outlineView shouldSelectItem:(id)item;
{
LOG(#"outlineView:shouldSelectItem: called");
return YES;
}
- (BOOL)outlineView:(NSOutlineView *)outlineView shouldCollapseItem:(id)item;
{
LOG(#"outlineView:shouldCollapseItem: called");
return NO;
}
#end
#implementation TaskLookupViewController (NSTableViewDelegate)
- (NSCell *)tableView:(NSTableView *)tableView dataCellForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
LOG(#"tableView:dataCellForTableColumn:row: called");
NSString *identifier = [tableColumn identifier];
if ([identifier isEqualToString:#"task"]) {
//LOG(#" task column setting the cell");
LookupPopupButtonCell *cellView = [[LookupPopupButtonCell alloc] init];
return cellView;
}
NSTextFieldCell *cellView = [tableView makeViewWithIdentifier:#"hoursCell" owner:self];
return cellView;
}
#end
It seems you must use a VIEW based tableView to get the delegate messages. Blah, now to figure out how to bind one of them to Core Data, hopefully its not too hard !
Is there any way to reuse the same menu for each row ? I guess as long as the dataSource is not recreated each time its probably not too bad, still there could be lots of rows in this hierarchy!
Can anyone help me to implement drag and drop in an NSTableView? I used this code below, but these methods are not getting called during execution.
- (BOOL)tableView:(NSTableView *)tv writeRowsWithIndexes:(NSIndexSet *)rowIndexes toPasteboard:(NSPasteboard*)pboard
{
// Copy the row numbers to the pasteboard.
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:rowIndexes];
[pboard declareTypes:[NSArray arrayWithObject:#".gif"] owner:self];
[pboard setData:data forType:#".gif"];
return YES;
}
- (NSDragOperation)tableView:(NSTableView*)tv validateDrop:(id <NSDraggingInfo>)info proposedRow:(NSInteger)row proposedDropOperation:(NSTableViewDropOperation)op
{
// Add code here to validate the drop
if (row > [ m_imageArray count])
return NSDragOperationNone;
if (nil == [info draggingSource]) // From other application
{
return NSDragOperationNone;
}
else if (self == [info draggingSource]) // From self
{
return NSDragOperationNone;
}
else // From other documents
{
[tv setDropRow: row dropOperation: NSTableViewDropAbove];
return NSDragOperationCopy;
}
NSLog(#"validate Drop");
return NSDragOperationCopy;
}
- (BOOL)tableView:(NSTableView *)aTableView acceptDrop:(id <NSDraggingInfo>)info
row:(NSInteger)row dropOperation:(NSTableViewDropOperation)operation
{
NSPasteboard* pboard = [info draggingPasteboard];
NSData* rowData = [pboard dataForType:#".gif"];
NSIndexSet* rowIndexes = [NSKeyedUnarchiver unarchiveObjectWithData:rowData];
NSInteger dragRow = [rowIndexes firstIndex];
// Move the specified row to its new location...
}
Here is an example
#import "TableViewController.h"
#import "Person.h"
#define MyDataType #"MyDataType"
#implementation TableViewController {
NSMutableArray *list;
NSInteger sourceIndex;
}
#synthesize tableView;
-(void)awakeFromNib {
[tableView registerForDraggedTypes:[NSArray arrayWithObjects:MyDataType, nil]];
list = [[NSMutableArray alloc] init];
Person *person = [[Person alloc] initWithName:#"Newton" age:64];
[list addObject:person];
person = [[Person alloc] initWithName:#"Archimedes" age:74];
[list addObject:person];
person = [[Person alloc] initWithName:#"Euler" age:44];
[list addObject:person];
person = [[Person alloc] initWithName:#"Poincare" age:24];
[list addObject:person];
person = [[Person alloc] initWithName:#"Gauss" age:34];
[list addObject:person];
}
-(void)reArrange:(NSMutableArray *)array sourceNum:(NSInteger)sourceNum destNum:(NSInteger)destNum {
Person *person = list[sourceNum];
[list insertObject:person atIndex:destNum];
if (sourceNum < destNum) {
[list removeObjectAtIndex:sourceNum];
} else {
[list removeObjectAtIndex:sourceNum+1];
}
[tableView reloadData];
}
#pragma mark - Table
// how many rows are there in the table?
-(NSInteger)numberOfRowsInTableView:(NSTableView *)tv {
return list.count;
}
// What object should I show in a particular cell?
-(id)tableView:(NSTableView *)tv objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
Person *person = list[row];
NSString *identifier = [tableColumn identifier];
return [person valueForKey:identifier];
}
// Should I accept the drag with the rows specified by rowIndexes? If YES then place the data on the provided paste board.
- (BOOL)tableView:(NSTableView *)tv writeRowsWithIndexes:(NSIndexSet *)rowIndexes toPasteboard:(NSPasteboard *)pboard {
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:rowIndexes];
[pboard declareTypes:[NSArray arrayWithObject:MyDataType] owner:self];
[pboard setData:data forType:MyDataType];
sourceIndex = [rowIndexes firstIndex];
return YES;
}
// What kind of drag operation should I perform?
- (NSDragOperation)tableView:(NSTableView*)tv validateDrop:(id )info proposedRow:(NSInteger)row proposedDropOperation:(NSTableViewDropOperation)op {
return op == NSTableViewDropAbove; // Specifies that the drop should occur above the specified row.
}
// The mouse button was released over a row in the table view, should I accept the drop?
- (BOOL)tableView:(NSTableView*)tv acceptDrop:(id )info row:(NSInteger)row dropOperation:(NSTableViewDropOperation)op {
[self reArrange:list sourceNum:sourceIndex destNum:row]; // let the source array reflect the change
return YES;
}
#end
You need to declare a custom drag type for your table view and then call registerForDraggedTypes: with your custom type. Otherwise, as you have noticed, none of these methods will get called.
Drag and Drop NSTableview using core data
Register table-view object for drag and drop:-
[tblCategory registerForDraggedTypes:[NSArray arrayWithObject:#"public.text"]];
Drag and drop Delegate methods:-
- (id <NSPasteboardWriting>)tableView:(NSTableView *)tableView pasteboardWriterForRow:(NSInteger)row
{
Category *category = (Category *)[self.arrCategoryList objectAtIndex:row];
NSString *identifier = category.categoryname;
NSPasteboardItem *pboardItem = [[NSPasteboardItem alloc] init];
[pboardItem setString:identifier forType: #"public.text"];
return pboardItem;
}
- (NSDragOperation)tableView:(NSTableView *)tableView validateDrop:(id <NSDraggingInfo>)info proposedRow:(NSInteger)row proposedDropOperation:(NSTableViewDropOperation)dropOperation
{
if(dropOperation == NSTableViewDropOn)
{
NSPasteboard *p = [info draggingPasteboard];
NSString *title = [p stringForType:#"public.text"];
Category* category ;
NSInteger srcIndex;
for (srcIndex = 0; srcIndex < [_arrCategoryList count]; srcIndex++)
{
category = [_arrCategoryList objectAtIndex:srcIndex];
if ([category.categoryname isEqualToString:title])
{
break;
}
category = nil;
}
if(!category)
{
// Not found
return NO;
}
[_arrCategoryList removeObjectAtIndex:srcIndex];
[_arrCategoryList insertObject:category atIndex:row];
[tblCategory reloadData];
return NSDragOperationMove;
}
return NSDragOperationNone;
}
- (BOOL)tableView:(NSTableView *)tableView acceptDrop:(id <NSDraggingInfo>)info row:(NSInteger)row dropOperation:(NSTableViewDropOperation)dropOperation
{
return YES;
}
I usually observe this kind of error when I forgot to hook up the dataSource to the NSTabeView in IB, i.e. the class implementing the tableView:writeRowsWithIndexes:toPasteboard: method of the NSTableViewDataSource.
You can register for draggedTypes for an NSMutableArray or NSMutableDictionary or any other object.Following Code snippet is for a NSMutableArray.
[tableView registerForDraggedTypes:[NSArray arrayWithObject:#"NSMutableArray"] ];
You need to declare a registerForDraggedTypes method in awakFromnib
like this.
[table_view registerForDraggedTypes:[NSArray arrayWithObjects:BasicTableViewDragAndDropDataType, nil]];
I have to recommend both this excellent Red Sweater blog post
http://www.red-sweater.com/blog/274/a-moveable-beast
It provides an NSArrayController sub-class which will enable drag and drop re-ordering of table items, and if you want to support dragging outside of the tableview with your objects, we've just written up a neat and simple addition to that class:
http://www.rwe-uk.com/blog/comments/nstableview_drag_and_drop_with_bindings_and_nsarraycontroller
It builds on the original post