跳转(pop)到指定界面

闲来无事，便随便记录写东西。iOS中pop到任意指定界面的方法有两种：

一、    

for (UIViewController *controller in self.navigationController.viewControllers) {

          if ([controller isKindOfClass:[YouController class]]) {

                   YouController  *youVC = [[YouController alloc] init];

                   [self.navigationController popToViewController:youVC animated:YES];

          }

 }

二、

UIViewController *controller = self.navigationController.viewControllers[需要跳转的界面，此处填数字]；

[self.navigationController popToViewController:controller animated:YES];