UIGestureRecognizer blocks subview for handling touch events

andershqst picture andershqst · Mar 7, 2011 · Viewed 65k times · Source

I'm trying to figure out how this is done the right way. I've tried to depict the situation: enter image description here

I'm adding a UITableView as a subview of a UIView. The UIView responds to a tap- and pinchGestureRecognizer, but when doing so, the tableview stops reacting to those two gestures (it still reacts to swipes).

I've made it work with the following code, but it's obviously not a nice solution and I'm sure there is a better way. This is put in the UIView (the superview):

-(UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {
    if([super hitTest:point withEvent:event] == self) {
        for (id gesture in self.gestureRecognizers) {
            [gesture setEnabled:YES];
        }
        return self;
    }
    for (id gesture in self.gestureRecognizers) {
        [gesture setEnabled:NO];
    }
    return [self.subviews lastObject];
}

Answer

Justin picture Justin · May 4, 2011

I had a very similar problem and found my solution in this SO question. In summary, set yourself as the delegate for your UIGestureRecognizer and then check the targeted view before allowing your recognizer to process the touch. The relevant delegate method is:

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
       shouldReceiveTouch:(UITouch *)touch