panGesture iOS

panGesture.m

/**
 * listener for pan gesture
 */
- (void)panListener
{
    UIPanGestureRecognizer *panGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panHandler:)];
    [self.view addGestureRecognizer:panGestureRecognizer];
}

/**
 * trigger on touch move
 */
-(void)panHandler:(UIPanGestureRecognizer *)panGestureRecognizer
{
    CGPoint touchLocation = [panGestureRecognizer locationInView:self.view];
    
    // begin
    if (panGestureRecognizer.state == UIGestureRecognizerStateBegan) {
        NSLog(@"Begin touch");
        NSLog(@"Begin pos x %f", touchLocation.x);
        NSLog(@"Begin pos y %f", touchLocation.y);
    } else if (panGestureRecognizer.state == UIGestureRecognizerStateEnded || panGestureRecognizer.state == UIGestureRecognizerStateFailed || panGestureRecognizer.state == UIGestureRecognizerStateCancelled) {
        NSLog(@"end touch");
    } else {
        NSLog(@"current pos x %f", touchLocation.x);
        NSLog(@"current pos y %f", touchLocation.y);
    }

}