UICollectionView单元格消失

Question

I am using collectionView in my iPad application. I have used custom layout class which inherited UICollectionViewFlowLayout class.

I am using horizontal scroll directional. The problem is, whenever we use scroll for collection view, some times cell get disappear. I debugged the code, and found that in data source method after creating cell, its hidden property get automatically ON.

I tried using below line but its not working

   cell.hidden = NO  

I have below method also to invalidate layout on bound change.

    - (BOOL)shouldInvalidateLayoutForBoundsChange:(CGRect)newBounds {
          return YES;
        }

But still I am facing problem. Any solution on this ?

Thanks in advance.

Answer 1

There is a known issue which may cause cells to disappear in UICollectionView. If their fix doesn't work for you, try PSTCollectionView , which is an open source replacement for UICollectionView. If PSTCollectionView works, you should file a radar ticket to Apple.

Answer 2

In my project, the UICollectionViewCell disappear also ,the flowLayout i use is a custom layout named UICollectionViewLeftAlignedLayout . Its scroll direction is horizontal .I debug the project again and again, have tried every solution i can find through google.com . All that did not work for me.

At the end ,i delete the UICollectionViewLeftAlignedLayout and use native UICollectionViewFlowLayout through:

UICollectionViewFlowLayout *layout   = [[UICollectionViewFlowLayout alloc] init];
[layout setScrollDirection:UICollectionViewScrollDirectionHorizontal];

layout.scrollDirection               = UICollectionViewScrollDirectionHorizontal;
_collectionView.collectionViewLayout = layout;
_CollectionView.autoresizingMask     = UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight;

And I set the cell spacing through storyboard（also you can set them through the layout's propery）:

Then i run the project again , the UICollectionViewCell DO NOT DISAPPEAR anymore. Hope my case can help you .