我可以弹出到特定的 ViewController 吗?

问题描述

我正在使用基于导航的应用程序.我将 First ViewController 推送到 Second ViewController 并从 Second ViewController 推送到 Third ViewController.现在我想从第三个 ViewController 弹出到第一个 ViewController.我正在使用下面的代码执行此任务，但我的应用程序崩溃了.

I am using navigation based application. I push First ViewController to Second ViewController and from Second ViewController to Third ViewController. Now I want to pop from Third ViewController to First ViewController.I am performing this task using the below code but my application crashed.

请任何人给我一些适当的指导.我不能使用 pop 到 rootViewController，因为它是不同的 viewController.提前谢谢...

Please any body give me some proper guidelines. I can't use pop to rootViewController because it's different viewController. Thanks in advance...

在第三个 ViewControler 我写了这个:

FirstViewCtr *x=[[FirstViewCtr alloc] initWithNibName:@"FirstViewCtr" bundle:nil];
[self.navigationController popToViewController:x animated:NO];

推荐答案

通过编写第一行，您可以获得所有视图控制器的索引，从第二行您将到达目的地.

By Writing the First Line you get the Indexes of all View Controllers and from second Line You will reach up to your Destination.

NSArray *array = [self.navigationController viewControllers];

[self.navigationController popToViewController:[array objectAtIndex:2] animated:YES];

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