觸發特定點擊區域

- (void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event{
   
    //如果touch到closeButton的區域，就觸發closeButton
    CGPoint pt = [[touches anyObject]locationInView:self.view];
    if (pt.x>closeButton.frame.origin.x &&
        pt.x<closeButton.frame.origin.x+closeButton.frame.size.width &&
        pt.y>closeButton.frame.origin.y &&
        pt.y<closeButton.frame.origin.y+closeButton.frame.size.height)
    {
        [self closeButtonTapped:touches];
    }

}