Thanks, I have reedited my question and pasted part of the code. When I use [self.giftCollectionView scrollToItemAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:section] AtScrollPosition: UICollectionViewScrollPositionCenteredHorizontally animated: YES] ,self.giftCollectionView didn't slow slide to the target point, It takes some time to get back to the target location and refresh the cell。"animated: Yes" didn't seem to work