Achieve "canBecomeFirstResponder" not start debugging interface

[p709723778]

1.UIViewController

• (BOOL)canBecomeFirstResponder
  {
  return YES;
  }

Return to "YES" when not activated, the case "NO" is possible

Shake the phone to realize it, the method must return YES

• (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event
  {
  if (motion == UIEventSubtypeMotionShake) {
  }
  }

I hope the author will give you a solution, thank you