/*
      
      
        *

 *獲取視圖當(dāng)前的控制器

*
      
      
        */
      
      

- (UIViewController*
      
        )viewController {

    
      
      
        for
      
       (UIView* next = [self superview]; next; next =
      
         next.superview) {

        UIResponder
      
      * nextResponder =
      
         [next nextResponder];

        
      
      
        if
      
       ([nextResponder isKindOfClass:[UIViewController 
      
        class
      
      
        ]]) {

            
      
      
        return
      
       (UIViewController*
      
        )nextResponder;

        }

    }

    
      
      
        return
      
      
         nil;

}