使用dequeuereusablecellwithreuseidentifier出错

Question

我在一个故事板中有一个集合视图，其中有4个集合视图单元原型，具有以下标识符:" cell "， "NoAlbumSelectedCell"， " nophotocell "one_answers"NoVideosCell"。

这是我用来加载单元格的代码:

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView
              cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
if (self.noAlbumSelected) {
    return [collectionView dequeueReusableCellWithReuseIdentifier:@"NoAlbumSelectedCell" forIndexPath:indexPath];
}
if ([self.medias count] == 0) {
    if ([self.listType isEqualToString:@"photo"]) {
        UICollectionViewCell *noPhotosCell = [collectionView dequeueReusableCellWithReuseIdentifier:@"NoPhotosCell" forIndexPath:indexPath];
        return noPhotosCell;
    } else {
        UICollectionViewCell *noVideosCell = [collectionView dequeueReusableCellWithReuseIdentifier:@"NoVideosCell" forIndexPath:indexPath];
        return noVideosCell;
    }
}
MediaCollectionViewCell *cell = (MediaCollectionViewCell *)[collectionView dequeueReusableCellWithReuseIdentifier:@"Cell" forIndexPath:indexPath];
[self configureCell:cell forItemAtIndexPath:indexPath];
return cell;
}

当我尝试显示"nophotocell"单元格时，我得到以下错误:

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

我试图做一个干净的重建。

Answer 1

您是否在viewController的viewDidLoad末尾添加了以下行?

[self.collectionView registerClass:[MediaCollectionViewCell class] forCellWithReuseIdentifier:@"Cell"];
[self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"NoAlbumSelectedCell"];
[self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"NoPhotosCell"];
[self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"NoVideosCell"];

如果您有子类UICollectionViewCell，那么您应该将[YourUICollectionViewSubClass class]与上述行结合使用。

Answer 2

您在viewdidload

中编写了以下代码

// Do any additional setup after loading the view from its nib.
    [self.collectionView registerClass:[CollectionViewImageCell class] forCellWithReuseIdentifier:@"Cell"];