UICollectionView's cellForItemAtIndexPath is not being called

Question

Only my second time using UICollectionView\'s and perhaps I have bitten off more than I can chew but nevertheless:

I am implementing a UICollectionView (myCollection

Answer 1

In my case, changing UINavigationBar's translucent to NO solved the problem.

Answer 2

It was happening for me when item height == 0 by fixing that cellForItem method was called.

Answer 3

Ten minutes ago I also encountered this problem, I made a silly mistake.

My intention is to use UICollectionViewFlowLayout,

But because of mistakes, I used UICollectionViewLayout.

Answer 4

Make sure -(NSInteger) collectionView:numberOfItemsInSection: is returning a positive (read, greater than zero) value. It may be a matter of placing [self.collectionView reloadData]; in the completion handler.

Answer 5

I was using autolayout, and in my case height constraint was missing

Answer 6

For me, I update the height of self.view (the collectionView's superview) via autolayout, and MUST call layoutIfNeeded after that.

[self.view mas_updateConstraints:^(MASConstraintMaker *make) {
    make.height.equalTo(@(height));
}];
[self.view layoutIfNeeded];