title: No touchesbegan: in live camera area of UIImagePickerController
body: <p>in my UIImagePickerController (camera shooting view), I want to track touches.
  Every touch event gets properly called except for touchesbegan:</p>
  
  <p>It's not a typo or something because touchesbegan: had been called up to the moment,
  I've changed the controller from UIViewController to UIImagePickerController.</p>
  
  <p>Why is touchesbegan: not called in UIImagePickerController?
  How do I achieve this?</p>
  
  <hr>
  
  <p>Update: It works. But only on the controls (which are located at the bottom). It doesn't work in the camera live picture.</p>