CODEWITHSUNDEEP
iosuicollectionviewuiswipegesturerecognizer
user694688
user694688

Reputation: 683

UICollectionView Swipe

I want to detect when a user swipes left or right in a collectionView in which one cell occupies the entire screen width. Is it possible to do without adding gesture recognizer. I have tried adding gesture recogniser, but it only works when we set scrollEnabled property of collectionView to NO.

UISwipeGestureRecognizer *swipeRight = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(didSwipeRight:)];
swipeRight.delegate = self;
swipeRight.numberOfTouchesRequired = 1;
[swipeRight setDirection:UISwipeGestureRecognizerDirectionRight];

UISwipeGestureRecognizer *swipeLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(didSwipeLeft:)];
swipeLeft.delegate = self;
swipeLeft.numberOfTouchesRequired = 1;
[swipeLeft setDirection:UISwipeGestureRecognizerDirectionLeft];

[self.collectionView addGestureRecognizer:swipeLeft];
[self.collectionView addGestureRecognizer:swipeRight];

Upvotes: 4

Views: 5537

Answers (4)

kocakmstf
kocakmstf

Reputation: 135

Maybe you have disabled userInteraction. Did you check it? And define gestures as property to the class.

self.collectionView.setUserInteractionEnabled=true;

Upvotes: 2

PowHu
PowHu

Reputation: 2189

I add swipe gesture to collectionView. And it work fine.

So like Stephen Johnson said. I guess your cell have a scrollView. So It block gestures.

Upvotes: 1

Stephen Johnson
Stephen Johnson

Reputation: 5121

I am not sure I fully understand the context of your problem. I see that you have a collection view within a collection view. I am going to assume that the outer collection view scrolls vertical and the inner one scrolls horizontal. You will want to set up a fail dependency between the gesture recognizers for both collections.

//Data source for your outer collection view
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView
                  cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
   ...
   UICollectionView* innerCollectionView = ...;

   [collectionView. panGestureRecognizer requireGestureRecognizerToFail:innerCollectionView. panGestureRecognizer];

   ...
}

If there is more going on than this with nested collection views can you give some more details?

Upvotes: 0

STEX
STEX

Reputation: 291

Try to override scrollViewWillEndDragging:scrollView withVelocity:velocity targetContentOffset:targetContentOffset, since the collection view inherits from a scroll view. This way you should be able to evaluate the velocity parameter to determine the direction. Therefore you'll want to implement the UIScrollViewDelegate protocol.

Upvotes: 1

Related Questions