UICollectionview is empty - ios

Question

Hi i have created one UIViewController in that i added one UICollectionView with CustomCell. Then, i created a uicollectionviewcell class for cell. Finally set the delegate and datasource in storybord itself. But it showing empty page. like in below image
CODE:
- (void)viewDidLoad
{
[super viewDidLoad];
self.collectionview = _collectionview;
self.collectionview.dataSource = self;
self.collectionview.delegate = self;
speakersImages=[[NSMutableArray alloc]init];
// Do any additional setup after loading the view, typically from a nib.
imageLabels=[[NSMutableArray alloc]initWithObjects:#"RB Forum 2013",#"Agenda",#"Speakers",#"Contact",#"Map",#"Websites",#"#Responsible Biz",#"Partners",#"Sustainability",nil];
imagePaths=[[NSMutableArray alloc]initWithObjects:[UIImage imageNamed:#"RBform.png"],[UIImage imageNamed:#"agenda.png"],[UIImage imageNamed:#"speakers.png"],[UIImage imageNamed:#"contact.png"],[UIImage imageNamed:#"map.png"],[UIImage imageNamed:#"website.png"],[UIImage imageNamed:#"twitter.png"],[UIImage imageNamed:#"partners.png"],[UIImage imageNamed:#"sustainability.png"], nil];
[self.collectionview registerClass:[NewCell class] forCellWithReuseIdentifier:#"Cell"];
}
- (NSInteger)numberOfSectionsInCollectionView:(UICollectionView *)collectionView
{
return 1;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView
numberOfItemsInSection:(NSInteger)section
{
return [imageLabels count];
}
//THE BELOW DELEGATE METHOD DOES NOT GET CALLED!
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
// we're going to use a custom UICollectionViewCell, which will hold an image and its label
//
static NSString *CellIdentifier = #"Cell";
NewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:CellIdentifier forIndexPath:indexPath];
// make the cell's title the actual NSIndexPath value
cell.labels.text = [NSString stringWithFormat:#"%#",[imageLabels objectAtIndex:indexPath.row]];
// load the image for this cell
NSLog(#"%#",imageLabels);
//NSString *imageToLoad = [NSString stringWithFormat:#"%d.JPG", indexPath.row];
// cell.image.image = [UIImage imageNamed:imageToLoad];
cell.images.image = [imagePaths objectAtIndex:indexPath.row];
return cell;
}

Answer 1

Solution is remove
[self.collectionview registerClass:[NewCell class] forCellWithReuseIdentifier:#"Cell"];
in storybord we dont need this

Answer 2

Code is ok but order is different.Assigning datasource and delegates before array is populated makes the number of cell returned to 0 ,since array is not yet populated
Try like this
speakersImages=[[NSMutableArray alloc]init];
// Do any additional setup after loading the view, typically from a nib.
imageLabels=[[NSMutableArray alloc]initWithObjects:#"RB Forum 2013",#"Agenda",#"Speakers",#"Contact",#"Map",#"Websites",#"#Responsible Biz",#"Partners",#"Sustainability",nil];
imagePaths=[[NSMutableArray alloc]initWithObjects:[UIImage imageNamed:#"RBform.png"],[UIImage imageNamed:#"agenda.png"],[UIImage imageNamed:#"speakers.png"],[UIImage imageNamed:#"contact.png"],[UIImage imageNamed:#"map.png"],[UIImage imageNamed:#"website.png"],[UIImage imageNamed:#"twitter.png"],[UIImage imageNamed:#"partners.png"],[UIImage imageNamed:#"sustainability.png"], nil];
[self.collectionview registerClass:[NewCell class] forCellWithReuseIdentifier:#"Cell"];
[self.collectionview reloadData];
this line is not needed
self.collectionview = _collectionview;
self.collectionview.dataSource = self;
self.collectionview.delegate = self;
also make sure your collection view is connected via outlet
make sure the <UICollectioniewDatasource,UICollectionviewDelegate> is there in the class header

Answer 3

In Your storyboard give your imageview a tag e.g. 1, and your label another tag e.g. 2
Give your cell reuse identifier that you have already gave eg. "Cell"
Now in your storyboard right click on collection view and create datasource and delegate to your viewController or file owner. alternatively you can use <UICollectionViewDataSource,UICollectionViewDelegate> in your viewController and set the delegate and datasource to self.
Now in your viewDidLoad
-(void) viewDidLoad {
self.collectionview.dataSource = self;
self.collectionview.delegate = self;
speakersImages=[[NSMutableArray alloc]init];
// Do any additional setup after loading the view, typically from a nib.
imageLabels=[[NSMutableArray alloc]initWithObjects:#"RB Forum 2013",#"Agenda",#"Speakers",#"Contact",#"Map",#"Websites",#"#Responsible Biz",#"Partners",#"Sustainability",nil];
imagePaths=[[NSMutableArray alloc]initWithObjects:[UIImage imageNamed:#"RBform.png"],[UIImage imageNamed:#"agenda.png"],[UIImage imageNamed:#"speakers.png"],[UIImage imageNamed:#"contact.png"],[UIImage imageNamed:#"map.png"],[UIImage imageNamed:#"website.png"],[UIImage imageNamed:#"twitter.png"],[UIImage imageNamed:#"partners.png"],[UIImage imageNamed:#"sustainability.png"], nil];
}
number of items in collection view
(NSInteger)collectionView:(UICollectionView *)collectionView
numberOfItemsInSection:(NSInteger)section
{
return [imageLabels count];
}
create cell and reuse
(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
UICollectionView *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"Cell"];
// make the cell's title the actual NSIndexPath value
UIlabel *label = (UIlabel *) [cell viewWithTag:2]
label.text = [NSString stringWithFormat:#"%#",[imageLabels objectAtIndex:indexPath.row]];
// load the image for this cell
UIImageView *imageView = (UIImageView *) [cell viewWithTag:1]
imageView.image = [imagePaths objectAtIndex:indexPath.row];
return cell;
}

Answer 4

- (void)viewDidLoad
{
[super viewDidLoad];
[self.collectionView registerNib:[UINib nibWithNibName:#"NewCell" bundle:nil] forCellWithReuseIdentifier:#"CELL"];
self.collectionview.dataSource = self;
self.collectionview.delegate = self;
self.imageLabels = [NSArray arrayWithObjects:#"RB Forum 2013",#"Agenda",#"Speakers",#"Contact",#"Map",#"Websites",#"#Responsible Biz",#"Partners",#"Sustainability",nil];
self.imagePaths=[NSArray arrayWithObjects::#"RBform.png",#"agenda.png",#"speakers.png",#"contact.png",#"map.png",#"website.png",#"twitter.png",#"partners.png",#"sustainability.png", nil];
}
- (NSInteger)collectionView:(UICollectionView *)collectionView
numberOfItemsInSection:(NSInteger)section
{
return [self.imageLabels count];
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
NewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:#"CELL" forIndexPath:indexPath];
cell.labels.text = [self.imageLabels objectAtIndex:indexPath.row]];
cell.images.image = [UIImage imageNamed:[self.imagePaths objectAtIndex:index path.row]];
return cell;
}