如何在iOS中使用Storyboard创建自定义UICollectionViewCell？

Question

I have a UIViewController in which I have a UICollectionView .The cells of the UICollectionView need to be images so I understand that I need to subclass the UICollectionViewCell class. So basically, I need a UIViewController which has a UICollectionView that has a custom UICollectionViewCell. I am using a storyboard and when I need to create a custom UITableVieCell , I do the following:

• Create a subclass of UITableViewCell
• Set this subclass as the class for the UITableViewCell in the storyboard
• Set a reuse identifier.
• Import this class in my view controller implementation, declare a cell of this subclass and proceed.

But when I follow the same for a UICollectionViewCell , for eg. I create a subclass called CustomCollectionViewCell , and declare it in the cellForItemAtIndexPath like

CustomCollectionViewCell *cell = (CustomCollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];

NSLog(@"%@",cell);

This logs <UICollectionViewCell: 0x137529010; frame = (10 10; 300 164); layer = <CALayer: 0x170220880>> <UICollectionViewCell: 0x137529010; frame = (10 10; 300 164); layer = <CALayer: 0x170220880>> <UICollectionViewCell: 0x137529010; frame = (10 10; 300 164); layer = <CALayer: 0x170220880>> no matter what I do. I can just not initialize my custom UICollectionViewCell class and hence cannot add the images.

I looked at other StackOverflow answers and read answers saying not to do this:

[self.collectionView registerClass:[CustomCollectionViewCell class] forCellWithReuseIdentifier:@"Cell"];

if I'm using storyboard, so I commented it out.

All the reuse identifiers, outlets etc have been set. I can't seem to find where the error is.

Any help is appreciated.

Answer 1

Try this,

set your custom collectionview cell class in Identity Inspector like

and in cellForItemAtIndexPath

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

    CollectionViewCell *cell = (CollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:@"cell" forIndexPath:indexPath];
    NSLog(@"%@", cell);
    return cell;
}

and got log as

<CollectionViewCell: 0x7af70000; baseClass = UICollectionViewCell; frame = (0 0; 70 69); clipsToBounds = YES; opaque = NO; layer = <CALayer: 0x7af70210>>

Answer 2

I figured it out.

It was a stupid mistake. The reuse identifier that I was using was already being used by a different cell someplace else. Changed it and it works perfectly now.