IOS: Selecting UICollectionView Cell by Long Press

Question

I'm using UICollectionView to generate a image gallery.I used UIImage inside the UICollectionView Cell to load the images.I need to select UICollectionView Cell by Long Press (not by single tap).

- (IBAction)longPress:(UILongPressGestureRecognizer *)gestureRecognizer
{

    UICollectionViewCell *cell=(UICollectionViewCell *)[gestureRecognizer view];
    int index=cell.tag;

    OverlayImage = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, cell.frame.size.width,     cell.frame.size.height)];
    OverlayImage.image = [UIImage imageNamed:@"Overlay@2x.png"];
    [cell addSubview:OverlayImage];

}

You can use `UILongPressGestureRecognizer` – Exploring Aug 14 '13 at 06:12 — Exploring, Aug 14 '13 at 06:12

score 10 · Answer 1 · edited Jun 20 '20 at 09:12

Swift 4

updated answer of it

{
    let longPressGR = UILongPressGestureRecognizer(target: self, action: #selector(handleLongPress(longPressGR:)))
    longPressGR.minimumPressDuration = 0.5
    longPressGR.delaysTouchesBegan = true
    self.collectionView.addGestureRecognizer(longPressGR)
}

@objc
func handleLongPress(longPressGR: UILongPressGestureRecognizer) {
    if longPressGR.state != .ended {
        return
    }
    
    let point = longPressGR.location(in: self.collectionView)
    let indexPath = self.collectionView.indexPathForItem(at: point)
    
    if let indexPath = indexPath {
        var cell = self.collectionView.cellForItem(at: indexPath)
        print(indexPath.row)
    } else {
        print("Could not find index path")
    }
}

It unwraps the indexPath, which is `self.collectionView.indexPathForItem(at: point)` — Nik Kov, Jul 11 '18 at 08:58

score 0 · Answer 2 · answered Aug 14 '13 at 06:15

You can use LongPressGesture

UILongPressGestureRecognizer *longpressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressHandler:)];
    longpressGesture.minimumPressDuration = 5;
    [longpressGesture setDelegate:self];
    [self.yourImage addGestureRecognizer:longpressGesture];


    - (void)longPressHandler:(UILongPressGestureRecognizer *)gestureRecognizer {
        NSLog(@"longPressHandler");
        UIImageView *tempImage=(UIImageView*)[gestureRecognizer view];
    }

IOS: Selecting UICollectionView Cell by Long Press

2 Answers2

Swift 4

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