如何获取view的controller

[b]如何获取view的controller[/b]

//获取view的controller
- (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;
}
//点击提交按钮
-(void)buttonPress{

    ElectronFrom *electronForm=[[ElectronFrom alloc]init];
    [[self viewController].navigationController pushViewController:electronForm animated:YES];
    [electronForm release];
 
}