issue with identifiers using dequeueReusableCellWithReuseIdentifier

Question

I'm getting this runtime error when I run my app in the simulator.

Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'could not dequeue a view of kind: UICollectionElementKindCell with identifier PlayingCard - must register a nib or a class for the identifier or connect a prototype cell in a storyboard'

The line it crashes on is

UICollectionViewCell* cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"PlayingCard"
                                                                       forIndexPath:indexPath];

in the method

-(UICollectionViewCell*) collectionView:(UICollectionView *)collectionView
             cellForItemAtIndexPath:(NSIndexPath *)indexPath{}

As I understand it, the error means the indentifier "PlayingCard" doesn' match up with any of the identifiers of CollectionViewCells in in the CollectionView, but I have made sure that the identifier in the storyboard is identical.

Thanks for your help

Answer 1

Your Error tell detail about your problem

must register a nib or a class for the identifier or connect a prototype cell in a storyboard

If you create UICollectionViewCell class only by code, use register class in viewDidLoad for collectionView

 [self.collectionView registerClass:[YourCell class] forCellWithReuseIdentifier:@"PlayingCard"];

If you create UICollectionViewCell by Xib, use registerNib

If you drag UICollectionViewCell into storyboard, specify UICollectionView class and reuse identifier

I think you forgot to specify class name for your Cell in storyboard

Answer 2

Here is a sample code of how to implement the cell with identifier for uicollectionview. I hope this helps out

 - (UICollectionViewCell *)collectionView:(UICollectionView *)cv cellForItemAtIndexPath:(NSIndexPath *)indexPath {
 UICollectionViewCell *cell = [cv dequeueReusableCellWithReuseIdentifier:@"YourIdentifier" forIndexPath:indexPath];
cell.backgroundColor = [UIColor whiteColor];
return cell; 
}

Also there is a great tutorial on uicollectionview view in ray' web site that would help you understand the whole concept a bit more. Here is the link Tutorial

Edit:

The issue with your project crashing was indeed in the storyboard part. You did everything correctly but your cell was never connected. It was an easy fix. I sent you back the project and left you a bit comments in there too.