获取当前试图的父试图

- (UIViewController*)viewController

{

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

        UIResponder*nextResponder = [nextnextResponder];

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

            return(UIViewController*)nextResponder;

        }

    }

    return nil;

}