The didSelectRowAtIndexPath not working.
Have I configured the 2 delegates. Everything is linked (tableview, tableviewcell).
Already deleted and did it again.
I searched for everything here and nothing worked.
I think this was one of the best link, still to no avail.
My last hope is that it is, I'm opening my ViewController, where has this tableview, for modal. But it would be VERY wrong the problem.
Other than that, I need some help
Somo codes .H
#interface simulator : UIViewController <UITableViewDelegate, UITableViewDataSource, UIScrollViewDelegate>
{
NSArray *array_products;
}
#property (nonatomic, strong) NSDictionary *plist_products;
#property (nonatomic, strong) IBOutlet UITableView *table_menu_left;
#property (nonatomic, strong) NSString *file_plist;
#end
Some codes .M
#import "cel_products.h"
- (void)viewDidLoad
{
NSString *path_root = [[NSBundle mainBundle] bundlePath];
NSString *full_path = [path_root stringByAppendingPathComponent:self.file_plist];
self.plist_products = [[NSDictionary alloc] initWithContentsOfFile:full_path];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"id_cell_products";
UITableViewCell *cell = [self.table_menu_left dequeueReusableCellWithIdentifier:CellIdentifier];
array_products = [self.plist_produtcs allKeys];
if (cell == nil)
{
NSArray *topLevelObjects = [[NSBundle mainBundle] loadNibNamed:#"cel_products" owner:self options:nil];
for(id currentObject in topLevelObjects)
{
if([currentObject isKindOfClass:[cel_products class]])
{
cell = (cel_products *)currentObject;
break;
}
}
}
cell.textLabel.text = [array_products objectAtIndex:indexPath.row];
return cell;
}
// numberofrowsinsection - OK
// numberofsectionintableviw - OK
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSLog(#"Hein?????");
// Nothing..........
}
I humbly thousand apologies to all!
I inadvertently clicked Attributes Inspector> Selection: NO SELECTION
So I do not find anything in the code.
Again, I apologize to everyone, but if someone, are having this problem, this is one more step to be verified. " Change to Attributes Inspector> Selection: SINGLE SELECTION or MULTIPLE SELECTION ( is up to you )
Thanks all for the answers and help
Did you set a break at didSelectRowAtIndexPath? Try and see if it breaks successfully there.
Expanding on rokjark's answer you have to manually set the delegate and data source to the file in question.
Your header file simulator.h simply declares it as A delegate/data source for SOME UITableView.
You still need to point table_menu_left to use simulator.h as THE delegate file to handle all of it's callbacks.
Set:
self.table_menu_left.delegate = self;
self.table_menu_left.datasource = self;
And again set a break in didSelectRowAtIndexPath and see if it gets called.
Related
I have UITableView I want to click on row and load detail view but I have null information in my Log in detail view
would you please help m win this implementation
Thanks in advance!
cellForRowAtIndexPath method:
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath
*)indexPath
{
//Load Cell for reuse
static NSString *CellIdentifier = #"TestCell";
TestCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell =[ [[NSBundle mainBundle] loadNibNamed:#"TestCell" owner:nil options:nil]
lastObject];
}
_tests = [server info];
_t = [NSMutableString stringWithFormat:#"%# ", [_tests objectAtIndex:indexPath.row]];
NSString *testdata = _t;
_components = [testdata componentsSeparatedByString:#","];
for (NSString *aComponent in _components) {
if ([aComponent hasPrefix:#"titletest"]) {
_subComponents = [aComponent componentsSeparatedByString:#":"];
_testString = [_subComponents[1] stringByTrimmingCharactersInSet:[NSCharacterSet
characterSetWithCharactersInString:#"\""]];
}if ([aComponent hasPrefix:#"note"]){
_subComponents = [aComponent componentsSeparatedByString:#":"];
_noteString = [_subComponents[1] stringByTrimmingCharactersInSet:[NSCharacterSet
characterSetWithCharactersInString:#"\""]];
break;
}
}
cell.title.text = _testString;
cell.note.text = _noteString;
return cell;
}
didSelectRowAtIndexPath method
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath
*)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
TestDetailView *c = [[TestDetailView alloc] init];
///I don't know what should I put here to c
[self.navigationController pushViewController:c animated:YES];
}
but in My detail view
- (void)viewDidAppear:(BOOL)animated{
[super viewDidAppear:YES];
NSLog(#" test : %#",_Info.datas); ==>> my log was (null)
}
My Detail View Header
#property (strong, nonatomic) IBOutlet UILabel *bDetailTitle;
#property (strong, nonatomic) IBOutlet UILabel *bDetailNote;
#property (nonatomic, strong) NSArray *datas;
#property (nonatomic,strong) TestTable *Info;
#end
I'm assuming that TestDetailView is a ViewController subclass and that you have a property on it possibly called datas. If that is the case you appear to create your detail view controller in didSelectRowAtIndexPath: like this:
TestDetailView *c = [[TestDetailView alloc] init];
But then immediately change it the pointer to something else (possibly nil):
c = [_datas objectAtIndex:indexPath.row];
objectAtIndex returns an id which means your code probably doesn't throw a warning in Xcode, but at run time if [_datas objectAtIndex:indexPath.row] does not return a UIViewController (and I suspect that it does not) your app could crash. If it is not throwing an error or crashing you possibly have another problem in that _datas is nil in your parent view controller.
It is a very common technique to pass values to view controllers I would recommend reading up on how to do this. This type of question has been asked on S.O. many times:
How to set value for NSString in another view controller from one viewcontroller
I'm writing an app and getting this error. Not sure how I would go about fixing it. Thank you.
The error is an undeclared identifier 'collectionView'
And the header file is being imported.
Header:
#import <UIKit/UIKit.h>
NSMutableData *content;
#interface AMCollectionViewController : UICollectionViewController
#property (weak, nonatomic) IBOutlet UIBarButtonItem *tagButton;
- (IBAction)tagButtonTouched:(id)sender;
#end
Implementation where error is occurring
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath*)indexPath
{
if(shareEnabled){
//determine the selected items by using the indexPath
NSString *selectedPhotos = [tagImages[indexPath.section] objectAtIndex:indexPath];
//add selected image into the array
[selectedPhotos addObject:selectedPhotos];
}
}
Thanks a lot guys
I use collectionView multiple times in the same .m file
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return 50;
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
static NSString *identifier =#"Cell";
AMCollectionViewCell *cell = (AMCollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:identifier forIndexPath:indexPath];
int imageNumber = indexPath.row % 10;
cell.imageView.image = [UIImage imageNamed:[NSString stringWithFormat:#"imageicon%d.jpg",imageNumber]];
cell.selectedBackgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:#"imageBorder.jpg"]];
return cell;
}
I don't know about that error, but
Your second reference to indexPath on this line can't be right:
NSString *selectedPhotos = [tagImages[indexPath.section] objectAtIndex:indexPath];
The objectAtIndex parameter needs an integer. You probably meant:
NSString *selectedPhotos = [tagImages[indexPath.section] objectAtIndex:indexPath.item];
or, to be more consistent (either use objectAtIndex or use the [] syntax, but using both is a little curious):
NSString *selectedPhotos = tagImages[indexPath.section][indexPath.item];
You haven't shown the declaration of tagImages, nor it's initialization, but I assume it is tagImages an array of an array of strings? If so, the above correction should fix it. If not, you should tell us how tabImages is populated/structured.
If selectedPhotos is a NSString, the use of the addObject method won't possibly work. The addObject method is a NSMutableArray method, not a NSString method.
I am using a UITableView that points to a UITabBarController to display a series of UIWebViews within these tabs.
I would like define a string to be used to construct a URL for each tab based on the item selected. The issue I am facing is how to pass the URL to the StateTrendViewController controller.
StateTableViewController.h
#import <UIKit/UIKit.h>
#interface StateTableViewController : UITableViewController
{
NSArray *StateList;
}
#property (nonatomic, retain) NSArray *StateList;
- (void) buildStateList;
#end
StateTableViewController.m
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [StateList count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
}
NSInteger rowNumber = indexPath.row;
NSString *stateName = [StateList objectAtIndex:rowNumber];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.textLabel.text = stateName.capitalizedString;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
NSInteger rowNumber = indexPath.row;
NSString *stateName = [StateList objectAtIndex:rowNumber];
[[self.navigationController.viewControllers objectAtIndex:2] setTitle:stateName.capitalizedString];
}
StateTrendViewController.h
#import <UIKit/UIKit.h>
#interface StateTrendViewController : UIViewController
{
IBOutlet UIWebView *StateTrendView;
IBOutlet NSString *ViewURL;
}
#property (nonatomic, retain) UIWebView *StateTrendView;
#property (nonatomic, retain) NSString *ViewURL;
#end
StateTrendViewController.m
#import "StateTrendViewController.h"
#implementation StateTrendViewController
#synthesize StateTrendView;
#synthesize ViewURL;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void) viewWillAppear:(BOOL)animated
{
NSString *baseURL = #"https://www.google.com/search?q=";
NSString *state = #"test";
NSString *fullURL = [baseURL stringByAppendingString:state];
NSURL *url = [NSURL URLWithString:fullURL];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; [StateTrendView loadRequest:requestObj];
}
I need to replace the static setting with the sting passed to the controller using the ViewURL property I have setup:
NSString *state = #"test";
I am using a Storyboard in my project in Xcode 4.2.1. How should I go about passing that string value to my controller?
You override prepareForSegue, more detail is here
If all you are passing is a string, the simplest way might be to define a property on your the view controller you are presenting to hold the string. I notice you already have one, *ViewURL defined, but I'm not sure if that's what you've setup for this specific task or if that is already intended for something else.
Based on the code you've shared, I'm assuming that in your didSelectRowAtIndexPath in your table controller, the controller you are setting the title, and presumably later pushing, is an instance of a StateViewController:
[[self.navigationController.viewControllers objectAtIndex:2] setTitle:stateName.capitalizedString];
If this line does indeed reference an instance of StateTrendViewController, you would assign your string in the same way you're assigning title. This needs to be set before you segue into the new view controller (I don't see that code):
[[self.navigationController.viewControllers objectAtIndex:2] setViewURL:#"MyPassedString"] //assign custom property
When your view controller appears on screen, it will have it's property ViewURL already set.
Also note that your naming style for instance variables is not a standard cocoa convention, ivars beginLowerCase. Additionally, it is unusual and may not work to push a TabBar controller inside an existing nav controller, presumably from table view view controller inside an existing nav controller. Typically a TabBar is considered a top-level navigational construct, and you may wish to rethink your architecture accordingly.
I am creating a custom UITableViewCells. I am using a NIB file as the cell. Its displaying some data from REST API's. The problem I am having is when I scroll down & then back up, the cells are not refreshed. It shows the data from when I scrolled down. Here's my code -
MyViewController.h
#interface FLOViewController : UIViewController <UISearchBarDelegate,
UITableViewDelegate,
UITableViewDataSource>
{
UISearchBar *sBar;
UITableView *searchResTable;
NSArray *searchRes;
UITableViewCell *resultsOne;
}
#property (nonatomic, retain) IBOutlet UILabel *photos;
#property(nonatomic, retain) IBOutlet UITableView *searchResTable;
#property (nonatomic, retain) NSArray *searchRes;
/* Search Results Templates */
#property (nonatomic, assign) IBOutlet UITableViewCell *resultsOne;
MyViewController.m
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
if(self.searchRes == nil)
return nil;
static NSString *cId = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cId];
if(cell == nil)
{
NSLog(#"CREATING NEW CELL");
[[NSBundle mainBundle] loadNibNamed:#"ResultsOne" owner:self options:nil];
cell = self.resultsOne;
self.resultsOne = nil;
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
//from here on displaying images etc from REST API.
UIImageView *uPhoto = (UIImageView *)[cell viewWithTag:2];
NSString *photoURL = [[self.searchRes objectAtIndex:[indexPath row]] objectForKey:#"originator_photo_url"];
if(photoURL)
{
[UIView beginAnimations:#"fadeIn" context:NULL];
[UIView setAnimationDuration:0.5];
NSString *urlString = [NSString stringWithString:photoURL];
[uPhoto setImageWithURL:[NSURL URLWithString:urlString]
placeholderImage:[UIImage imageNamed:[NSString stringWithFormat:#"ph%d.png",[indexPath row]]]];
[UIView commitAnimations];
}
//similarly display other sections in the cell...
Why are the contents of my cell not refreshing? Even when I put in completely new data (through search from REST API's) some of the cells still show old views in the tablecells.
UPDATE: If I comment out UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cId]; then the problem is solved. i.e. I dont see repetition of cell content on scrolling.
Because I am creating custom ImageViews in UITableViewCell do i need to do something special to clear out the cell content before new content can be added??
To me it looks like you forgot to reset the uPhoto-UIImageView, in case the photoURL is nil. This brings in cached data.
if (photoURL) {
...
}
else {
uPhoto.image = nil;
}
You are using
static NSString *cId = #"Cell";
Let's try different identifier for each cell. I face this problem and solve it by using different cell identifier like
static NSString *cId =[NSString StringWithFormat : #"Cell_%d_%d",[indexPath section], [indexPath row] ];
I think it may solve your problem.
I know this has been asked over and over again. I've tried all given solution but still it didn't work. I have set the datasource and delegate to my table view and also set it to my pointers.
Here is my code:
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
NSLog(#"%i", resultSoap.count);
return resultSoap.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell.
NSString *cellValue = [resultSoap objectAtIndex:indexPath.row];
cell.textLabel.text = cellValue;
NSLog(#"Celldisplay");
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
I've called the reloadData on my viewDidLoad: method. The thing is, it fired numberOfRowsInSection: method and I get the row count correct but it didn't fire this cellForRowAtIndexPath: method.
Any solution?
Use this code:
urtableview.delegate = self;
urtableview.datasource = self;
After declaring the resultsoap array in your code.
It must be due to calling reload method of table when table view datasource array "resultsoap" is empty.
Make sure that your datasource array is not empty and check if the array has objects saved.
Because if numberOfRowsInSection returns 0 then the cellForRowAtIndexPath may not be called.
And this must be in your case.
Please Add Bellow Code In Your Suitable Methods.
if You had take Simple Controller and Add Table View than
In your Header File .h
#import <UIKit/UIKit.h>
#interface TaskAndTax : UIViewController<UITableViewDelegate, UITableViewDataSource>
{
IBOutlet UITableView *MyTableView;
}
#property (nonatomic, retain) UITableView *MyTableView;
#end
And in Your .m File
#synthesize MyTableView;
-(void) viewWillAppear:(BOOL)animated
{
[MyTableView reloadData];
}
And Kindly Connect IBOutlet Of TableView in Our Case its MyTableView to TableView in XIB file.