I have a collectionView that will display a cell from the dataArray. The dataArray is changed to self.postsArray or self.eventsArray from a segmentControl as well as the reuseIdentifier to determine the cell(a post cell and a event cell). The events work fine, but the Post Cell, which contains a label with a tag of 95, does not work. When I NSLog(#"label: %#", label); I get nil. So i have no idea what the problem is.
#pragma mark Collection View:
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return [dataArray count];
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
if (dataArray == self.postsArray) {
UILabel *label = (UILabel *)[cell viewWithTag:95];
[label.text isEqualToString:#"Hello"];
NSLog(#"label: %#", label);
return cell;
}
if (dataArray == self.eventsArray) {
PFObject *temp = [dataArray objectAtIndex:indexPath.row];
UIButton *eventButton = (UIButton *) [cell viewWithTag:10];
NSLog(#"Event: %#", eventButton);
UIButton *groupButton = (UIButton *) [cell viewWithTag:11];
[eventButton setTitle:[temp objectForKey:#"Title"] forState:UIControlStateNormal];
[groupButton setTitle:[temp objectForKey:#"Group_Name"] forState:UIControlStateNormal];
eventButton.tag = indexPath.row;
groupButton.tag = indexPath.row;
return cell;
}
return cell;
}
#pragma mark SegmentControl:
- (void) segmentChanged: (id) sender{
UISegmentedControl *seg = (UISegmentedControl *) sender;
if (seg.selectedSegmentIndex == 0) {
dataArray = self.postsArray;
reuseIdentifier = #"postsCell";
[self.collectionView reloadData];
}
if (seg.selectedSegmentIndex == 1) {
dataArray = self.eventsArray;
reuseIdentifier = #"eventCell";
[self.collectionView reloadData];
}
}
[self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:groupReuseIdentifier]; was left in my viewDidLoad and was hiding my first cells
Related
I have a small problem ..
For convenience and to make you understand better how to share the collection View:
Collectionview 1 has the customized segment control function (it has a custom UICollectionView custom class)
Collectionview 2 contains the cells that function as pages (it has a UICollectionViewController class).
I have an UIViewController that contains the collectionview1 that I used to create a custom segment control (like a menu)
The cursor indicating which cell was selected was created with a uiview in the collectionView 1 class.
In my main view controller in addition to having a collectionview I also inserted a container view that contains a collectionview controller that will be used to show the selected pages through a horizontal scroll.
My problem now appears when I want to pass the ContentOffset value into the collectionView2 scrollViewDidScroll to the cursor in the collectionView 1.
I tried to initialize the collectionview 1 class in the collectionView 2 class to use the cursor directly but I do not get any results.
Can you help me understand how to solve this problem?
This is Class CollectionView 1 ( Menu )
-(instancetype)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
[self setupControl];
}
return self;
}
-(void)setupControl {
self.delegate = self;
self.dataSource = self;
self.pagingEnabled = YES;
self.showsHorizontalScrollIndicator = NO;
UINib *nib = [UINib nibWithNibName:#"UDSectionNavCell" bundle: nil];
[self registerNib:nib forCellWithReuseIdentifier:#"SCC"];
[self layout];
_horizontalCursorBar = [[UDSectionNavCursor alloc] init];
_horizontalCursorBar.frame = CGRectMake(0, self.frame.size.height - 6, self.frame.size.width / 4, 3);
_horizontalCursorBar.layer.cornerRadius = 3;
_horizontalCursorBar.backgroundColor = [UIColor colorWithHexString:#"#C1C1C1" setAlpha:1];
_horizontalCursorBar.alpha = 1;
[self addSubview:_horizontalCursorBar];
NSIndexPath *indexPath = [NSIndexPath indexPathForItem:0 inSection:0];
[self selectItemAtIndexPath:indexPath animated:NO scrollPosition:UICollectionViewScrollPositionNone];
}
-(void)layout {
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
layout.sectionInset = UIEdgeInsetsMake(0, 0, 0, 0);
layout.itemSize = CGSizeMake(self.frame.size.width / 4, self.frame.size.height);
layout.minimumInteritemSpacing = 10;
layout.minimumLineSpacing = 0;
layout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
self.collectionViewLayout = layout;
[self reloadData];
}
-(NSArray *)dataPage {
return [NSArray arrayWithObjects:#"ATENEO",#"STATISTICHE",#"CALENDARIO",#"NOTIFICHE", nil];
}
-(NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return [self dataPage].count;
}
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(nonnull NSIndexPath *)indexPath {
static NSString *cellID = #"SCC";
UDSectionNavCell *cell = (UDSectionNavCell *)[collectionView dequeueReusableCellWithReuseIdentifier:cellID forIndexPath:indexPath];
cell.titlePage.text = [[self dataPage] objectAtIndex:indexPath.item];
return cell;
}
-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath {
NSIndexPath *newIndexPath = [NSIndexPath indexPathForItem:indexPath.row inSection:0];
[self scrollToItemAtIndexPath:newIndexPath atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:YES];
if (indexPath == newIndexPath) {
[self scrollToItemAtIndexPath:indexPath atScrollPosition:UICollectionViewScrollPositionCenteredHorizontally animated:YES];
}
[UIView animateWithDuration:.5 delay:0 usingSpringWithDamping:1 initialSpringVelocity:1 options:UIViewAnimationOptionCurveEaseOut animations:^{
CGFloat x = (indexPath.item) * self.frame.size.width / 4;
_horizontalCursorBar.frame = CGRectMake(x, self.frame.size.height - 6, self.frame.size.width / 4, 3);
} completion:nil];
}
This is the code of CollectionView 2 (page cell)
static NSString * const reuseIdentifier = #"Cell";
- (void)viewDidLoad {
[super viewDidLoad];
[self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier];
UICollectionViewFlowLayout *collectionLayout = [[UICollectionViewFlowLayout alloc] init];
collectionLayout.scrollDirection = UICollectionViewScrollDirectionHorizontal;
collectionLayout.minimumLineSpacing = 0;
self.collectionView.collectionViewLayout = collectionLayout;
[self.collectionView reloadData];
self.collectionView.pagingEnabled = YES;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
#pragma mark <UICollectionViewDataSource>
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView {
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section {
return 4;
}
-(CGSize)collectionView:(UICollectionView *)collectionView layout:(nonnull UICollectionViewLayout *)collectionViewLayout sizeForItemAtIndexPath:(nonnull NSIndexPath *)indexPath {
return CGSizeMake(self.view.frame.size.width, self.view.frame.size.height);
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
NSArray *array = [NSArray arrayWithObjects:[UIColor redColor],[UIColor blueColor], [UIColor clearColor], [UIColor grayColor], nil];
cell.backgroundColor = array[indexPath.item];
return cell;
}
-(void)scrollViewDidScroll:(UIScrollView *)scrollView {
NSLog(#"%f",scrollView.contentOffset.x / 4);
}
I would need to pass the ContentOffset value of the scrollViewDidScroll method in the collectionView 2 class and use it in the collectionView class 1
I have a UICollectionView and Im trying to set a label and an image in the collectionViewCell. Unfortunately I cant seem to get any labels to display or anything else for that matter.
Here is my code:
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"cellIdentifier" forIndexPath:indexPath];
UILabel *issue = [[UILabel alloc] initWithFrame:CGRectMake(0,10,cell.bounds.size.width,40)];
if(indexPath.item %2 == 0){
cell.backgroundColor=[UIColor blueColor];
issue.text = #"Some Text";
issue.textColor = [UIColor greenColor];
issue.textAlignment = NSTextAlignmentCenter;
}
else {
cell.backgroundColor=[UIColor redColor];
issue.text = #"Some Text";
issue.textColor = [UIColor greenColor];
issue.textAlignment = NSTextAlignmentCenter;
}
}
Unfortunately no label is being displayed and neither is the text in the label.
Updated: I've added the rest of the code from this class file.
#import "ContainerListController.h"
#import "ContainerController.h"
#import "ContainerList.h"
#implementation ContainerListController
//Deallocate temp variables
- (void)dealloc {
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
//Initiate objects
- (id)init {
if (self = [super initWithTitle:LocStr(#"CONTAINER_LIST_TITLE") navBarHidden:NO]) {
m_paths = [ContainerList shared].paths;
[[NSNotificationCenter defaultCenter] addObserver:self
selector:#selector(onContainerListDidChange)
name:kSDKLauncherContainerListDidChange object:nil];
}
return self;
}
//Load all the views.
- (void)loadView {
//Allocate a UI view
self.view = [[UIView alloc] init];
//Create flow layout
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc] init];
//Force Horizontal Scroll
[layout setScrollDirection:UICollectionViewScrollDirectionHorizontal];
layout.minimumInteritemSpacing =[[UIScreen mainScreen] bounds].size.width;
layout.minimumLineSpacing=0.0;
//Create Collection
UICollectionView *coll =[[UICollectionView alloc] initWithFrame:self.view.frame collectionViewLayout:layout];
//Allocations
m_coll = coll;
coll.dataSource =self;
coll.delegate =self;
coll.pagingEnabled = YES;
coll.collectionViewLayout = layout;
//Customize Cells
[coll registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:#"cellIdentifier"];
[coll setBackgroundColor:[UIColor orangeColor]];
[layout invalidateLayout];
//Create the subview
[self.view addSubview:coll];
//set minimum spacing
/*if(UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation)){
NSLog(#"Changed to landscape Spacing");
layout.minimumLineSpacing = 100.0f;
layout.minimumInteritemSpacing = 100.0f;
}
else{
layout.minimumLineSpacing = 40.0f;
layout.minimumInteritemSpacing = 40.0f;
}*/
//Old Layout
//UITableView *table = [[UITableView alloc] initWithFrame:CGRectZero style:UITableViewStylePlain];
//m_table = table;
//table.dataSource = self;
//table.delegate = self;
//[self.view addSubview:table];
}
- (void)onContainerListDidChange {
m_paths = [ContainerList shared].paths;
[m_table reloadData];
[m_coll reloadData];
}
//Debugging components function
/*-(void)printComps:(NSArray* ) components{
for (NSInteger i =0; i<16; i++) {
NSString * item;
item=components[i];
}
}*/
//old tableview cell
- (UITableViewCell *)
tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault
reuseIdentifier:nil];
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
NSString *path = [m_paths objectAtIndex:indexPath.row];
NSArray *components = path.pathComponents;
cell.textLabel.text = (components == nil || components.count == 0) ?
#"" : components.lastObject;
return cell;
}
//Old tableView
- (void)
tableView:(UITableView *)tableView
didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableView deselectRowAtIndexPath:indexPath animated:YES];
NSString *path = [m_paths objectAtIndex:indexPath.row];
ContainerController *c = [[ContainerController alloc] initWithPath:path];
if (c != nil) {
[self.navigationController pushViewController:c animated:YES];
}
NSLog(#"Selected an item");
}
//old TableView count for epubs
- (NSInteger)
tableView:(UITableView *)tableView
numberOfRowsInSection:(NSInteger)section{
return m_paths.count;
}
- (void)viewDidLayoutSubviews {
//m_table.frame = self.view.bounds;
m_coll.frame = self.view.bounds;
}
//Collection View Cell Data Allocation
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView
cellForItemAtIndexPath:(NSIndexPath *)indexPath{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"cellIdentifier" forIndexPath:indexPath];
UILabel *issue = [[UILabel alloc] initWithFrame:CGRectMake(0,10,cell.bounds.size.width,40)];
//UICollectionViewCell *content = [[UICollectionViewCell alloc] init];
if(indexPath.item %2 == 0){
cell.backgroundColor=[UIColor blueColor];
issue.text = #"Some Text";
issue.textColor = [UIColor greenColor];
issue.textAlignment = NSTextAlignmentCenter;
}
else {
cell.backgroundColor=[UIColor redColor];
issue.text = #"Some Text";
issue.textColor = [UIColor greenColor];
issue.textAlignment = NSTextAlignmentCenter;
}
NSString *path = [m_paths objectAtIndex:indexPath.row];
NSArray *components = path.pathComponents;
NSString *Title = components.lastObject;
NSLog(#"Title: %#",Title);
NSString *Titletest = components.lastObject;
NSInteger comp1 = components.count;
NSString *comps = #"components";
NSLog(#"There are: %ld %#", (long)comp1,comps);
NSLog(#"Title: %#",Titletest);
for (NSInteger i =0; i<15; i++) {
NSString * item;
item=components[i];
NSLog(#"Component:%ld %#",(long)i,components[i]);
}
return cell;
}
//Collection View Cell Data De-Allocation
- (void)
collectionView:(UICollectionView *)collectionView
numberofItemsInSection:(NSIndexPath *)indexPath{
[collectionView deselectItemAtIndexPath:indexPath animated:YES];
NSString *path = [m_paths objectAtIndex:indexPath.row];
ContainerController *c = [[ContainerController alloc] initWithPath:path];
if(c !=nil){
[self.navigationController pushViewController:c animated:YES];
}
}
//Collection
-(NSInteger)
collectionView:(UICollectionView *)collectionView
numberOfItemsInSection:(NSInteger)section{
return m_paths.count;
}
//Set Collection View Cell Size
-(CGSize)
collectionView:(UICollectionView *) collectionView
layout:(UICollectionViewLayout*)collectionViewLayout
sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
//Set Landscape size of cells
/*if(UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation)){
CGFloat cellWidth = [[UIScreen mainScreen] bounds].size.width-360;
CGFloat cellHeigt = [[UIScreen mainScreen] bounds].size.height-60;
NSLog(#"Is Landscape");
return CGSizeMake(cellWidth, cellHeigt);
}
//Set Potrait size of cells
else{
CGFloat cellWidth = [[UIScreen mainScreen] bounds].size.width-60;
CGFloat cellHeigt = [[UIScreen mainScreen] bounds].size.height-160;
NSLog(#"Is Portrait");
return CGSizeMake(cellWidth, cellHeigt);
}*/
return CGSizeMake(collectionView.bounds.size.width, collectionView.bounds.size.height);
}
//Collection View Cell Position
- (UIEdgeInsets)collectionView:
(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section {
if(UIDeviceOrientationIsPortrait([UIDevice currentDevice].orientation)){
return UIEdgeInsetsMake(150.0,0.0,150.0,0.0); // top, left, bottom, right
}
else{
return UIEdgeInsetsMake(20.0,0.0,0.0,0.0); // top, left, bottom, right
}
}
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation{
[m_coll performBatchUpdates:nil completion:nil];
}
-(void)viewWillTransitionToSize:withTransitionCoordinator{
[m_coll performBatchUpdates:nil completion:nil];
}
/*-(CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)
collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section{
CGFloat cellSpacing = ((UICollectionViewFlowLayout *) collectionViewLayout).minimumLineSpacing;
CGFloat cellWidth = ((UICollectionViewFlowLayout *) collectionViewLayout).itemSize.width;
NSInteger cellCount = [collectionView numberOfItemsInSection:section];
CGFloat inset = (collectionView.bounds.size.width - ((cellCount-1) * (cellWidth + cellSpacing))) * 0.5;
inset = MAX(inset, 0.0);
if(UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation)){
NSLog(#"Changed to landscape Spacing");
return inset;
}
else{
return inset;
}
}*/
#end
Clear example to use custom collectionViewCell.
Create a separate class subclass ofUICollectionViewCell see below code:
.h file:
#import <UIKit/UIKit.h>
#interface CollectionViewCell : UICollectionViewCell
#property (weak, nonatomic) IBOutlet UILabel *customLabel;
#end
.m file:
#import "CollectionViewCell.h"
#implementation CollectionViewCell
#end
Now drag and drop the collectionView inside viewController using storyboard then by selecting cell set custom class for it and connect its IBOutlet of label see below image.
Setting up custom class:
Connecting label's outlet: if adding label and other ui component from storyboard
Note: Drag uilabel inside cell before you connect its IBOutlet.
Now configure cell inside your viewController class. And configure collectionView correctly by connecting its delegate, dataSuorce and IBOutlet.
#import "ViewController.h"
#import "CollectionViewCell.h"
#interface ViewController (){
// instance variable deceleration part
NSMutableArray *yourArray;
}
#end
#implementation ViewController
- (void)viewDidLoad{
[super viewDidLoad];
_yourCollView.delegate = self;
_yourCollView.dataSource = self;
yourArray = [[NSMutableArray alloc] initWithObjects:#"1st cell",#"2nd cell",#"3rd cell",#"4th cell", nil];
// Do any additional setup after loading the view, typically from a nib.
}
// collection view delegate methods
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
return [yourArray count];
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
CollectionViewCell *cell = (CollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:#"MyCustomCell" forIndexPath:indexPath];
// configuring cell
// cell.customLabel.text = [yourArray objectAtIndex:indexPath.row]; // comment this line if you do not want add label from storyboard
// if you need to add label and other ui component programmatically
UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, cell.bounds.size.width, cell.bounds.size.height)];
label.tag = 200;
label.text = [yourArray objectAtIndex:indexPath.row];
// this adds the label inside cell
[cell.contentView addSubview:label];
return cell;
}
//Note: Above two "numberOfItemsInSection" & "cellForItemAtIndexPath" methods are required.
// this method overrides the changes you have made to inc or dec the size of cell using storyboard.
- (CGSize)collectionView:(UICollectionView *)collectionView layout: (UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
return CGSizeMake(100, 100);
}
} // class ends
Setup the cell identifier (by selecting a cell) MyCustomCell you have given inside cellForItemAtIndexPath method before use see below image:
Note: Change the text color of uilabel to white before because by default collectionView appears black.
Hope here you understand.
Create subclass of UICollectionViewCell. For instance TestCollectionViewCell.
In Storyboard drag label in cell and set "Custom class" for this UICollectionViewCell with your created class. Set Reusable identifier, if your collection view in UIViewController don't forget to set DataSource and Delegate for that collectionView.
Connect IBOutlet in your Cell subclass.
Set at least 1 value inside numberOfItemsInSection method.
Then use your subclass of cell in cellForItemAt and try set text for a label.
You are missing the:
[cell.contentView addSubview:issue];
I want to hide the NSArrays (menuItems, about, and charting) on the click for the specific section header for the tableview cell arrays. I got the section header to highlight and de-highlight depending on tap gesture recognizer count but I can not get the tableview cells to hide when that specific section header is clicked. Can someone please help? Thank you! Here is my .m code. My GCF float method is located at the bottom of the .m.
#interface SidebarTableViewController ()
#end
#implementation SidebarTableViewController {
NSArray *menuItems;
NSArray *about;
NSArray *charting;
}
- (void)viewDidLoad {
[super viewDidLoad];
menuItems = #[#"Home",#"Field Goal", #"Punt", #"Kick Off", #"Snapper", #"Punter"];
about = #[#"Home",#"About Us", #"Tutorial"];
charting = #[#"Home",#"Charting"];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view data source
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = #"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}
if (indexPath.section==0) {
NSString *CellIdentifier = [menuItems objectAtIndex:indexPath.row];
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
return cell;
}
else if(indexPath.section==1) {
NSString *CellIdentifier2 = [charting objectAtIndex:indexPath.row];
UITableViewCell *cell2 = [tableView dequeueReusableCellWithIdentifier:CellIdentifier2 forIndexPath:indexPath];
return cell2;
}
else {
NSString *CellIdentifier1 = [about objectAtIndex:indexPath.row];
UITableViewCell *cell1 = [tableView dequeueReusableCellWithIdentifier:CellIdentifier1 forIndexPath:indexPath];
return cell1;
}
}
#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 {
// Set the title of navigation bar by using the menu items
NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
UINavigationController *destViewController = (UINavigationController*)segue.destinationViewController;
destViewController.title = [[menuItems objectAtIndex:indexPath.row] capitalizedString];
}
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 3 ;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (section==0)
{
return [menuItems count];
}
else if(section==1)
{
return [charting count];
}
else{
return [about count];
}
}
- (UIView*) tableView: (UITableView*) tableView viewForHeaderInSection: (NSInteger) section
{
UILabel *headerLabel = [[UILabel alloc]init];
headerLabel.tag = section;
headerLabel.userInteractionEnabled = YES;
headerLabel.backgroundColor = [UIColor grayColor];
if(section == 0){
headerLabel.text = [NSString stringWithFormat:#"Timers Without Charting"];
}
else if(section==1)
{
headerLabel.text = [NSString stringWithFormat:#"Charting with Timers"];
}
else{
headerLabel.text = [NSString stringWithFormat:#"About Us/Tutorial"];
}
headerLabel.frame = CGRectMake(0, 0, tableView.tableHeaderView.frame.size.width, tableView.tableHeaderView.frame.size.height);
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(catchHeaderGesture:)];
tapGesture.cancelsTouchesInView = NO;
[headerLabel addGestureRecognizer:tapGesture];
return headerLabel;
//return nil;
}
-(void)catchHeaderGesture:(UIGestureRecognizer*)sender
{
border ++;
if (border == 1)
{
UILabel *caughtLabel = (UILabel*)sender.view;
caughtLabel.layer.borderColor = [UIColor yellowColor].CGColor;
caughtLabel.layer.borderWidth = 2;
}
if (border == 2 )
{
UILabel *caughtLabel = (UILabel*)sender.view;
caughtLabel.layer.borderColor = [UIColor clearColor].CGColor;
caughtLabel.layer.borderWidth = 2;
border = 0;
}
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
border ++;
if (border == 1)
{
UITableViewCell* cell = [menuItems objectAtIndex:indexPath.row];
cell.hidden = YES;
return 40.0;
}
if (border == 2 )
{ border = 0;
UITableViewCell* cell = [menuItems objectAtIndex:indexPath.row];
cell.hidden = YES;
}
return 0;
}
#end
You need a few couple things to make this work.
section headers that respond to taps.
a method for expanding or collapsing a section.
some way to track which sections are collapsed.
The first is trivial. Return a UIView for the header, and attach a UITapGestureRecognizer to it. You'll need a method to figure out which section it is. You can use the tag property, or you can store the views in an NSMutableArray.
In tableView:numberOfRowsInSection: you return 0 if the section is collapsed, or the actual number, if not.
In the handler for the gesture recognizer, you toggle the collapsed/expanded state, and then you call `[self.tableView reloadSections:withRowAnimation:] to update the visuals.
(I do see in your posted code that you already handle part of this.)
I want to swipe cell on click a button . I am succesful on swiping a cell. But i want to swipe on button which is in cell. my code is
- (NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *simpleTableIdentifier = #"SimpleCell";
SimpleCell *cell = (SimpleCell *)[tableView dequeueReusableCellWithIdentifier:simpleTableIdentifier];
if (cell == nil)
{
NSArray *nib = [[NSBundle mainBundle] loadNibNamed:#"SimpleCell" owner:self options:nil];
cell = [nib objectAtIndex:0];
}
SimpleCell *cekks=[[SimpleCell alloc]init];
cekks.scrollButton.alpha =0.0;
NSString *titleString;
UIButton *sender = [[UIButton alloc]init];
//[sender setBackgroundImage:[UIImage imageNamed:#"swipe.png"] forState:UIControlStateNormal];
sender.tag = indexPath.row;
titleString =#"Send A Gift";
UITableViewRowAction *sendAGift = [UITableViewRowAction rowActionWithStyle:UITableViewRowActionStyleNormal title:titleString handler:^(UITableViewRowAction *action, NSIndexPath *indexPath){
// [self deleteMail:[NSArray arrayWithObject:indexPath]:YES];
}];
[sendAGift setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:#"swipe.png"]]];
return #[sendAGift];
}
I think your class SimpleCell should contain the UIButton, in order perform reusing correctly.
It will be simpler if you create a custom UITableViewCell that contains all the UI actions over the cell and operate them within the cell, not in the UITableView itself.
Let's see an example:
Here's the customCell.h file:
#interface customCell : UITableViewCell {
UIButton *buttonSwipe;
}
#end
Here's the customCell.h file:
#import "customCell.h"
#implementation customCell
- (instancetype) initWithFrame:(CGRect)frame {
self = [super initWithFrame:frame];
if (self) {
[self commonInit];
}
return self;
}
- (instancetype) initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
[self commonInit];
}
return self;
}
- (instancetype)initWithCoder:(NSCoder *)aDecoder {
self = [super initWithCoder:aDecoder];
if (self) {
[self commonInit];
}
return self;
}
- (void) commonInit {
buttonSwipe = [UIButton... // Initialize here your button
[buttonSwipe addTarget:self action:#selector(swipeCell:) forControlEvents:UIControlEventTouchUpInside];
}
- (void) swipeCell {
// Embed here the code that makes the effect of swipe the cell.
}
This is a fast-untested workaround with some predefined code, but I think it's a working example if you want to make your cells swipe with your own code.
But if you want a faster way, I recommend you to visit Chris Wendel and his SWTableViewCell on GitHub
You can call editActionsForRowAtIndexPath: method as
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:SELECTED_ROW_INDEX inSection:0];
[self tableView:self.tableView editActionsForRowAtIndexPath:indexPath];
try the below code
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:#"Cell" forIndexPath:indexPath];
//swipe button allocation
UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 30, 30)];
btn.tag = indexPath.row;
[cell.contentView addSubview:btn];
[btn addTarget:self action:#selector(buttonTouched:) forControlEvents:UIControlEventTouchUpInside];
cell.textLabel.text = [NSString stringWithFormat:#"%lu",indexPath.row];
return cell;
}
-(void)buttonTouched:(id)sender{
UIButton *btn = (UIButton *)sender;
NSIndexPath *indexPath = [NSIndexPath indexPathForRow:btn.tag inSection:0];
[self tableView:self.tableView editActionsForRowAtIndexPath:indexPath];
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return NO if you do not want the specified item to be editable.
return YES;
}
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
[self.objects removeObjectAtIndex:indexPath.row];
[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.
}
}
-(NSArray *)tableView:(UITableView *)tableView editActionsForRowAtIndexPath:(NSIndexPath *)indexPath{
NSLog(#"edit");
// code
return nil;
}
i have multiple image in uicollectionview like grid view. i want select multiple image at a time but not working this code.please any one give idea about this code.
i have already tried this code but not working.
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath: (NSIndexPath *)indexPath
{
NSMutableArray *indexPaths = [NSMutableArray arrayWithObject:indexPath];
if (self.selectedItemIndexPath)
{
// if we had a previously selected cell
if ([indexPath compare:self.selectedItemIndexPath] == NSOrderedSame)
{
// if it's the same as the one we just tapped on, then we're unselecting it
self.selectedItemIndexPath = nil;
}
else
{
// if it's different, then add that old one to our list of cells to reload, and
// save the currently selected indexPath
[indexPaths addObject:self.selectedItemIndexPath];
self.selectedItemIndexPath = indexPath;
}
}
else
{
// else, we didn't have previously selected cell, so we only need to save this indexPath for future reference
self.selectedItemIndexPath = indexPath;
}
// and now only reload only the cells that need updating
[self.collectionView reloadItemsAtIndexPaths:indexPaths];
}
// I Have Drag the UICollectionView Controller in storyboard
static NSString * const reuseIdentifier = #"Cell";
- (void)viewDidLoad
{
[super viewDidLoad];
[self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:reuseIdentifier];
arrImage = [[NSMutableArray alloc]initWithObjects:#"1.jpeg",#"2.jpeg",#"3.jpeg",#"4.jpeg",#"5.jpeg",#"6.jpeg",#"7.jpeg",#"8.jpeg",#"9.jpeg",#"10.jpeg",#"flower.jpeg",#"flower1.jpeg", nil];
[self.collectionView setAllowsMultipleSelection:YES];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark <UICollectionViewDataSource>
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section
{
return [arrImage count];
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:reuseIdentifier forIndexPath:indexPath];
UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];
recipeImageView.image = [UIImage imageNamed:[arrImage objectAtIndex:indexPath.row]];
[self.view addSubview:recipeImageView];
cell.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:[arrImage objectAtIndex:indexPath.row]]];
return cell;
}
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell* cell=[self.collectionView cellForItemAtIndexPath:indexPath];
cell.contentView.backgroundColor = [[UIColor yellowColor] colorWithAlphaComponent:0.15];
}
- (void)collectionView:(UICollectionView *)collectionView didDeselectItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionViewCell* cell=[self.collectionView cellForItemAtIndexPath:indexPath];
UIImageView *recipeImageView = (UIImageView *)[cell viewWithTag:100];
recipeImageView.image = [UIImage imageNamed:[arrImage objectAtIndex:indexPath.row]];
}