未调用 cellForItemAtIndexPath 但 numberOfItemsInSection 调用 [英] cellForItemAtIndexPath not called but numberOfItemsInSection does

问题描述

这可能是重复的帖子，但我没有找到解决方案.

This could be a duplicate post but I haven't found the solution.

我将 UICollectionView 设置为:

UINib *nib = [UINib nibWithNibName:@"CollectionViewCell"
                           bundle:[NSBundle mainBundle]];
[_collectionView registerNib: nib forCellWithReuseIdentifier:@"bCell"];

(我尝试设置委托，没有委托等).

(I've tried to set a delegate, without delegate, etcetera).

然后，只有

- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section 被调用而

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath 没有.

我检查了我返回的 numberOfItemsInSection，它总是 >0(正好是 17).

I've checked the numberOfItemsInSection I return, and it's always > 0 (it's exactly 17).

我检查过调用 [_collectionView reloadData]; 也没有任何反应.

I've checked to call [_collectionView reloadData]; and nothing happens either.

我尝试了不同的方法，但无法成功.

I've tried different things but I can't make it work.

此外，我的 UICollectionView 应该在这里，但它不是:

Furthermore, my UICollectionView should be here but it's not:

有人知道吗?谢谢.

推荐答案

好的，我认为这对未来的问题很有用...

Ok I think this could be useful for future problems with this...

这是因为 StoryBoard 的限制.我真的不明白为什么会发生这种情况，因为我刚刚固定了一个水平空间.我删除了水平空间作为该视图的约束，一切正常.

It was because of constraints on the StoryBoard. I don't really understand why that happens, because I just had fixed an horizontal space. I removed the horizontal space as constraint for that View and everything works fine.

好吧，让我们生活下去吧.

Well, let's life flow.

这篇关于未调用 cellForItemAtIndexPath 但 numberOfItemsInSection 调用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！