PSCollectionView的代表不触发

问题描述

我在 Github 上关注了PSCollectionView的用法.

I followed PSCollectionView's usage on Github.

这是我的代码:

- (void)viewDidLoad
{
  self.collectionView = [[PSCollectionView alloc] init];
  self.collectionView.collectionViewDataSource = self;
  self.collectionView.collectionViewDelegate = self;
  self.collectionView.numColsPortrait = 2;

  [self.view addSubview:self.collectionView];
  [self.collectionView reloadData]; // If i don't call this my console will be empty.
}
- (NSInteger)numberOfRowsInCollectionView:(PSCollectionView *)collectionView 
{
  NSLog(@"num rows");
  return 2;
}
- (PSCollectionViewCell *)collectionView:(PSCollectionView *)collectionView cellForRowAtIndex:(NSInteger)index
{
  NSLog(@"cell for row");
  return nil;
}
- (CGFloat)collectionView:(PSCollectionView *)collectionView heightForRowAtIndex:(NSInteger)index
{
  NSLog(@"height for row");
  return 0.0;
}

我的控制台是空的.但是当我调用[collectionView reloadData]时，结果如下:

My console was empty. But when I called [collectionView reloadData], here is the result:

num rows
height for row
height for row
num rows

我不知道为什么没有打印出行单元格".

I have no idea why "cell for row" is not printed out.

有任何提示或建议吗?谢谢.

Any hint or suggestion? Thank you.

推荐答案

最后我可以使它起作用了！

Finally I can make it works!

您必须设置PSCollectionView实例的框架.

You must set the PSCollectionView instance's frame.

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