虽然在is6上工作正常，但UICollectionVIew在ios7上无法充分显示单元格

Question

I have a simple implementation of a UICollectionView with default layout that works fine on iOS6 . When transitioning the code on iOS7 , the default UICollectionViewFlowLayout seems not to work: all the cells are located on the top left corner at the exact same locations (one on top of the others).

Note that I do not update cell.frame.origin, nor cell.center in:

(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath {} 

Am I wrong? What should I do it?

Thank you in advance

Answer 1

I understood my problem:

I had the follwoing line in my code:

   [cell.layer setPosition: CGPointMake(-5, -5)];

which explains why the cell was located at the top left corner.

But strangely, when running on ios6, this line had no effect (and that's why I even forgotten it was there) whereas it does have on ios7.

I simply delete the line, and now everything is running fine on both ios6 and ios7.