CODEWITHSUNDEEP
iosios9
Chris G.
Chris G.

Reputation: 25974

UICollectionViewController moveItemAtIndexPath - how to know when done dragging

I need to get an event/information when CollectionView is starting and stopping dragging.

I think this must be a normal scenario when dragging cells around - to be able to save the list behind the CollectionView.

- (void)collectionView:(UICollectionView *)collectionView
   moveItemAtIndexPath:(NSIndexPath *)sourceIndexPath
           toIndexPath:(NSIndexPath *)destinationIndexPath{

Upvotes: 1

Views: 280

Answers (2)

Andrew Veresov
Andrew Veresov

Reputation: 319

use this methods to get start scrolling and end scrolling of collection view:

 func scrollViewWillBeginDecelerating(_ scrollView: UIScrollView) {

 }

 func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {

 }

Upvotes: 0

Annie Gupta
Annie Gupta

Reputation: 2822

Idea #1:

Use below two delegate methods :-

func collectionView(collectionView: UICollectionView, willDisplayCell cell: UICollectionViewCell, forItemAtIndexPath indexPath: NSIndexPath) {

}

//Method Signature Changed for Swift 3

func collectionView(UICollectionView, didEndDisplaying: UICollectionViewCell, forItemAt: IndexPath) {

}

Idea #2: UICollectionView is a subclass of UIScrollView. So if you have set the delegate and implemented UIScrollViewDelegate, you should be able to detect this the same way as UIScrollView

Check in this function:

func scrollViewDidEndDecelerating(_ scrollView: UIScrollView) {
}

This should work..

Cheers!

Upvotes: 2

Related Questions