ios - 错误无法使 UICollectionElementKindCell 类型的 View 出列

Question

第一次尝试 Collection View 并遇到此错误:

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

代码很简单，如下所示。我一生都无法弄清楚我错过了什么。

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

Collection View Controller 是使用 nib 创建的，委托(delegate)和数据源都设置为文件的所有者。

View Controller 的头文件也非常基本。

@interface NewMobialViewController_3 : UICollectionViewController <UICollectionViewDataSource, UICollectionViewDelegateFlowLayout>
@end

Answer 1

来自UICollectionView documentation对于出列方法:

Important: You must register a class or nib file using the registerClass:forCellWithReuseIdentifier: or registerNib:forCellWithReuseIdentifier: method before calling this method.