Why scrollToItem isn't working in my CollectionView? I want to work scrollToItem on EnabledID
. So what's a problem and how fixed it?
Code:
var dataArray = NSMutableArray() // dataArray is has a data from Database
var EnabledID = Int()
EnabledID = UserDefaults.standard.integer(forKey: "EnabledID")
if EnabledID == 0 {
EnabledID = 1
UserDefaults.standard.set(1, forKey: "EnabledID")
} else {
if EnabledID < dataArray.count {
let index = NSIndexPath(item: EnabledID, section: 0)
self.myCollectionView.scrollToItem(at: index as IndexPath, at: .centeredVertically, animated: true)
}
}
Try this code...
Objective-C
[collectionView setDelegate:self];
[collectionView reloadData];
[collectionView layoutIfNeeded];
[collectionView scrollToItemAtIndexPath:[NSIndexPath indexPathForItem:0 inSection:0] atScrollPosition:UICollectionViewScrollPositionTop animated:YES];
Swift - 4.x
collectionView.delegate = self
collectionView.reloadData()
collectionView.layoutIfNeeded()
collectionView.scrollToItem(at: IndexPath(item: 0, section: 0), at: .top, animated: true)
When the scroll direction is horizontal you need to use left,right or centeredHorizontally.
top is for the vertical direction.
collectionView.scrollToItem(at: index, at: .top, animated: true)