Question

Im slightly confused by a method in the UIGestureRecognizerDelegate protocol. When I implement the delegate method below, I don’t seem to ever get my UITapGestureRecognizers sent to this method with their state as UIGestureRecognizerStateRecognized. They are always in the state UIGestureRecognizerStatePossible. Is this right?

Below is the test code I used to setup my Tap Gesture and my test implementation of the delegate method:

UITapGestureRecognizer *singelTap = [[UITapGestureRecognizer alloc] initWithTarget:nil action:nil];    
singelTap.numberOfTapsRequired = 1;
singelTap.delegate = self;
[self.view addGestureRecognizer:singelTap];

.

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
        int i = 0;

        if(gestureRecognizer.state == UIGestureRecognizerStateBegan){
            i=1;
        }
        if(gestureRecognizer.state == ..... //testing for all possible states...


return YES;
}

Answer 1

Found this in the documents

This method is called before touchesBegan:withEvent: is called on the gesture recognizer for a new touch.

So I guess the touch can only ever be in the ‘possible’ state.