Disappearing UICollectionViewCells on Add

[coreych]

Set a larger size for the UICollectionViewCells, horizontal scrolling and default 50 objects. Scroll to the end of the UICollection. Tap the Add button. You will see the the UICollectionViewCells disappearing (38 - 43) and came back on when you tap the Add button again. Any suggestion how to fix / debug this?

This is what I set for RFViewController's viewDidLoad, layout.blockPixels = CGSizeMake(310, 225), and at blockSizeForItemAtIndexPath returning only CGSizeMake(1.0, 1.0).

[coreych]

Resolved this by removing the line _furthestBlockPoint = CGPointZero; from - (void) invalidateLayout.

[p-blin]

you're patch causes a bug when changing orientation and no scroll is needed, a scroll appears and insets are incorrect

i added the line you removed inside the method 'shouldInvalidateLayoutForBoundsChange'

• (BOOL)shouldInvalidateLayoutForBoundsChange:(CGRect)newBounds {
  if (!(CGSizeEqualToSize(newBounds.size, self.collectionView.frame.size))){
  _furthestBlockPoint = CGPointZero;
  return YES;
  }
  return NO;
  // return !(CGSizeEqualToSize(newBounds.size, self.collectionView.frame.size));
  }

i'm aware it's not a good practice to change object state in a method that should simply return YES or NO but my time to investigate this bug is limited.

[coreych]

Thanks for this wasn't aware of the bugs created. I hope Bryce can investigate this further.