the behavior of the UICollectionViewFlowLayout is not defined, because the cell width is greater than collectionView width

Question

2015-08-18 16:07:51.523 Example[16070:269647] the behavior of the UICollectionViewFlowLayout is not defined because: 2015-08-18 16:07:51.523
Example

Answer 1

XCode 11

For me, the reason was that the CollectionView's Estimate option size was set to Automatic. It seems it is the default behavior in XCode 11.

Hence for me which I loaded the images in the cells, because of the size of the images and the automatic option (which wants to adapt the size of the cell with the size of the image) the cell's width became greater than the CollectionView's width.

By setting this option to None the problem solved.