Question

I am populating a UITableView with cells containing a UIImageView subview. I would like to detect touches on the image view, so I am also adding a gesture recognizer to it. However, nothing is getting called. Here is my code:

UIImageView *delete = [[UIImageView alloc] initWithFrame:CGRectMake(1.0, 8.0, 33.0, 33.0)];
delete.image = [UIImage imageNamed:@"Delete.png"];
delete.userInteractionEnabled = YES;
delete.contentMode = UIViewContentModeCenter;

UIGestureRecognizer *gesture = [[UIGestureRecognizer alloc] initWithTarget:self action:@selector(deleteTapped)];
gesture.delegate = self;

[delete addGestureRecognizer:gesture];
[self.cellView addSubview:delete];

Note: I am technically adding the image view to a container which is then added to the the cell itself, hence [self.cellView addSubview:delete]. But I have had the same results adding the image view to the cell directly.

According to this answer on a similar post this is a known bug in iOS 5.0; the solution is to override a delegate method to force the gesture recognizer to begin:

The fix is to override -gestureRecognizerShouldBegin: in the gesture recognizer’s delegate and return YES. This bug should be fixed in a future version of iOS 5.x. This is only safe as long as you are not using the new UITableViewCell copy/paste API’s.

I’ve tried this, but the delegate method never gets called. I’ve set the delegate property (see above) and implemented <UIGestureRecognizerDelegate> as follows:

- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
    NSLog(@"gesture delegate method called");
    return YES;
}

Does any one have an idea why this still wouldn’t be working? Or perhaps what this status of this bug is in iOS 5.1?

Answer 1

try to return YES for this delegate methode - (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer;

and if you want to detect the tap action use UITapGestureRecognizer