popTOViewController [英] popTOViewController

问题描述

我有一个名为"HOME"的按钮.在该按钮操作中，我有以下代码:

I have a button named 'HOME'. In that button action I have the following code:

[self.navigationController popToViewController:[self.navigationController.viewControllers objectAtIndex:1] animated:YES];

当我单击此按钮时，我的应用程序崩溃.

When I click this button my app crashes.

将索引从1更改为2，然后可以完美地弹出视图.

Changing the index from 1 to 2, then it pops the view perfectly.

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

我的查看顺序是Page1-> Page2-> Page3

My view sequence is Page1 --> Page2 --> Page3

我想从Page3转到Page1，但是该应用程序崩溃了.从Page3到Page2都可以正常工作.

I want to go from Page3 to Page1 but the app crashes. From Page3 to Page2 it works fine.

推荐答案

尝试一下.

在我编写SeeMyScoresViewController的地方，应该编写必须去的View Controller类.(例如Home类)

Where I have written SeeMyScoresViewController you should write your View Controller class on which you have to go.(eg. Class of Home)

NSArray *viewControllers = [[self navigationController] viewControllers];
for( int i=0;i<[viewControllers count];i++){
    id obj=[viewControllers objectAtIndex:i];
    if([obj isKindOfClass:[SeeMyScoresViewController class]]){
        [[self navigationController] popToViewController:obj animated:YES];
        return;
    }
}

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