从堆栈中删除 ViewController [英] Remove ViewController from stack

问题描述

在我们的应用程序中，我们有一个登录ViewController A.在用户登录时，会自动调用导航请求以导航到下一个 ViewController B.但是，当这完成后，我们想从堆栈中删除登录 ViewController A，这样用户就不能返回"到登录视图，而是返回之前的 ViewController 代替登录.

In our App we have a log-in ViewController A. On user log-in, a request navigate is automatically called to navigate to the next ViewController B. However when this is done we want to remove the log-in ViewController A from the stack so the user cannot "go back" to the log-in view but goes back the previous ViewController before the log-in instead.

我们考虑过在加载 ViewController B 时将 ViewController A 从堆栈中移除，但有没有更好的方法?

We thought about removing the ViewController A from the stack when ViewController B is loaded, but is there a better way?

在应用程序的 Android 版本中，我们设置了 history=no(如果我没记错的话)然后它就可以工作了.

In the Android version of the App we've set history=no (if I recall correctly) and then it works.

在 MonoTouch 和 MvvmCross 中是否有类似的方法来实现这一点?

Is there an similar way to achieve this in MonoTouch and MvvmCross?

推荐答案

我最终从导航控制器中删除了不需要的视图控制器.在我登录的 ViewDidDisappear() 中 ViewController 我做了以下事情:

I ended up with removing the unwanted viewcontroller from the navigation controller. In ViewDidDisappear() of my login ViewController I did the following:

public override void ViewDidDisappear (bool animated)
{
    if (this.NavigationController != null) {
        var controllers = this.NavigationController.ViewControllers;
        var newcontrollers = new UIViewController[controllers.Length - 1];
        int index = 0;
        foreach (var item in controllers) {
            if (item != this) {
                newcontrollers [index] = item;
                index++;
            }

        }
        this.NavigationController.ViewControllers = newcontrollers;
    }
    base.ViewDidDisappear(animated);
}

这样我就可以在从视图中删除不需要的 ViewController 时删除它.我不完全相信这是否是正确的方法，但它工作得相当好.

This way I way remove the unwanted ViewController when it is removed from the view. I am not fully convinced if it is the right way, but it is working rather good.

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