CODEWITHSUNDEEP
iosobjective-c
Donny
Donny

Reputation: 94

How to get the location of the UICollectionViewCell in self.view?

I used the code below to get the location of the cell when touched. However, when the UICollectionView.bounds.size.width > 320, or > 640, the "origin.x" returned often > 320, for example, 657, 469. Cause there are some images inside cells. So when I touched the cell on the second page. The value X returned may be 368.0 or other values.

I just need to get the value X in the current view.(320 * 480).



UICollectionViewLayoutAttributes *attributes = [self.collectionView layoutAttributesForItemAtIndexPath:indexPath];

- (void)viewDidLoad
{
// attach long press gesture to collectionView
UILongPressGestureRecognizer *lpgr 
   = [[UILongPressGestureRecognizer alloc]
                 initWithTarget:self action:@selector(handleLongPress:)];
lpgr.minimumPressDuration = .5; //seconds
lpgr.delegate = self;
[self.collectionView addGestureRecognizer:lpgr];
}

-(void)handleLongPress:(UILongPressGestureRecognizer *)gestureRecognizer
{
if (gestureRecognizer.state != UIGestureRecognizerStateEnded) {
    return;
}
CGPoint p = [gestureRecognizer locationInView:self.collectionView];

NSIndexPath *indexPath = [self.collectionView indexPathForItemAtPoint:p];
if (indexPath == nil){
    NSLog(@"couldn't find index path");            
} else {
    // get the cell at indexPath (the one you long pressed)
    UICollectionViewCell* cell =
    [self.collectionView cellForItemAtIndexPath:indexPath];
    // do stuff with the cell
}
}

Upvotes: 0

Views: 359

Answers (1)

Stonz2
Stonz2

Reputation: 6396

If I understand your question correctly, your collection view may have multiple pages horizontally. Assuming these pages are frame-width, you could do this:

int xVal = (int)p.x % (int)self.view.frame.size.width;

Keep in mind that you will lose decimal precision.

Upvotes: 1

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