UIPanGestureRecognizer get cords of all touches

Question

I have added the following gesture recognizer:

UIPanGestureRecognizer *d2 = [[UIPanGestureRecognizer alloc] 
                              initWithTarget:self 
                              action:@selector(ViewDragging2:)];
[d2 setMinimumNumberOfTouches:2];
[d2 setMaximumNumberOfTouches:2];
[targetView addGestureRecognizer:d2];

and the method that get's fired when that event occurs is:

-(void)ViewDragging2:(UIPanGestureRecognizer*)sender {

    // some point
    CGPoint translatedPoint = [(UIPanGestureRecognizer*)sender translationInView:targetView];
}

that get's me the point of one touch even though I touch with two fingers. How can I retrieve the cords of the first and second touch?

Answer 1

You can access all the touches using these methods:

• (NSUInteger)numberOfTouches
• (CGPoint)locationOfTouch:(NSUInteger)touchIndex inView:(UIView *)view

They are defined in the base class, UIGestureRecognizer.

Answer 2

Try the following code.

UIPanGestureRecognizer *d2 = [[UIPanGestureRecognizer alloc] 
                          initWithTarget:self 
                          action:@selector(ViewDragging2:)];
  [d2 setMinimumNumberOfTouches:2];
  [d2 setMaximumNumberOfTouches:2];
 [targetView addGestureRecognizer:d2];

and the method that get's fired when that event occurs is:

   -(void)ViewDragging2:(UIPanGestureRecognizer*)sender
    {
      // where touchIndex is either 0 or 1.
       CGPoint location = [recognizer locationOfTouch:touchIndex inView:self.view];
   }

check this link locationOfTouch and numberOfTouches

Regards, Neil.