SWIFT中CollectionView内部的单元格自动滚动

Question

How can I scroll inside a collection view such that I will always see one cell at a time, occupying the whole screen? Like what you do when browsing individual photos in your iPhone's gallery. Let's say:

(cell 1) |space| (cell 2)

when I scroll to the left and the space position is less than half of screen width, automatically, (cell 1) should go back to its position and occupy the screen. But when I scroll left and space is greater than screen width, (cell 2) will automatically occupy the screen and pushing the (cell 1) away..

How can I achieve that?

Answer 1

The behaviour you're looking for is called paging , but if you want a space between cells then you will need to use a custom layout ( UICollectionViewLayout subclass) and implement - targetContentOffsetForProposedContentOffset:withScrollingVelocity: . This tells the collection view where to come to a halt after the user stops interacting.