获取控制器的方法

/**
 *  获取UIView所在的视图控制器
 */
//- (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;
//}