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]; }