iosobjective-cuikituicollectionviewuigesturerecognizer

UICollectionView drag finger over cells to select them

Using UICollectionView, is it possible to select multiple cells by dragging your finger over a few of them? E.g., if you drag your finger over a row of 6, and down into the next row, it would select all of them.

Tried something simple:

UISwipeGestureRecognizer *swipeGuesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeGesture:)];
[self.collectionView addGestureRecognizer:swipeGuesture];

But that seemed to only call the method on the first cell that was touched.

Any ideas?

Solution

  • You could use UIPanGestureRecognizer. And based on the location of the pan events, tracking what cells are passed through. When the gesture ends, you would have an array of selected cells.

    Make sure that cancelsTouchesInView is set to NO. You'll need to set the delegate with gestureRecognizer:shouldRecognizeSimultaneouslyWithGestureRecognizer: and gestureRecognizerShouldBegin implemented to make sure the CollectionView can still scroll