title: TouchesBegan only in specific UIView
body: <p>I have three <code>UIView</code> instances:</p>
  
  <pre><code>UIView *view1;
  UIView *view2;
  UIView *view3;
  
  -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
  
   UITouch *touch =[touches anyObject];
   CGPoint startPoint =[touch locationInView:self.view];
  
  }
  </code></pre>
  
  <p>But i want that the toch-action only go in view2. It doesnt work if i make: locationInView:view2</p>
  
  <pre><code>-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
  
   UITouch *touch =[touches anyObject];
   CGPoint startPoint =[touch locationInView:view2];
  
  }
  </code></pre>
  
  <p>What do I wrong? How can i check, which view is the view i actually can see on my iphone?</p>