title: how to move the UIButton
body: <p>i create a UIButton *actionbtn,it's default image is 1.png,and hightlight image is 2.png, i select this button,and move it to any place of the screen.my code is </p>
  
  <pre><code>-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
  UITouch *touch = [touches anyObject];
  CGPoint touchMoved = [touch locationInView:self];
      actionbtn.frame = CGRectMake(touchMoved.x-40, touchMoved.y-40, 80, 80);
  }
  </code></pre>
  
  <p>if i clicked the button and move it,it can not be moved,but if i touch the screen,and move on the screen the button can work...</p>