无法打开Xamarin.Forms“页面"来自Xamarin.Android [英] Cannot open a Xamarin.Forms "Page" from Xamarin.Android

问题描述

上下文::我们的团队正在尝试使用Xamarin.Forms(XF)

Context: Our team is trying to use Xamarin.Forms (XF) Embedding to slowly convert our project from using Xamarin.Native to XF, for easier maintenance & implementation of features in the future.

问题:您可以在链接所引用的行的函数参数中看到，Xamarin允许您将任何类型的XF Page转换为ViewController href ="https://github.com/xamarin/Xamarin.Forms/blob/master/Xamarin.Forms.Platform.Android/AppCompat/PageExtensions.cs#L75" rel ="nofollow noreferrer"> iOS ，但它仅允许在ContentPage转换为本机Fragment. cs#L8"rel =" nofollow noreferrer> Android .

The Problem: As you can see in the function parameters on the lines referenced by the links, Xamarin allows you to convert any type of XF Page to a native ViewController in iOS, but it only allows converting a XF ContentPage to a native Fragment in Android.

重要性:这种差异起主要作用，因为通过Xamarin.Native Android，您不能实现XF NavigationPage.那是什么意思?在Xamarin.Native Android内部，您无法将应用程序转换为使用XF，因此无法调用PushAsync或PopAsync之类的函数.

Importance: This difference plays a major role, because through Xamarin.Native Android, you can't implement a XF NavigationPage. What does that mean? From within Xamarin.Native Android, you can't convert your app to use XF, so you can't call functions like PushAsync or PopAsync.

添加的解释:您可以在 iOS，如您在此示例中所见，它只需执行以下操作即可使用PushAsync或PopAsync之类的功能:

Added Explanation: You can open NavigationPages on iOS, as you can see in this sample here which allows using functions like PushAsync or PopAsync, by simply doing:

UIViewController user2 = new NavigationPage(new TestPage()).CreateViewController();

因此对于 >，目前我们只能这样做

So for Android as seen here, currently we can only do this

Android.Support.V4.App.Fragment fragment = new TestPage().CreateSupportFragment(this);

我想知道是否有办法做这样的事情?

and I was wondering is there a way to do something like this?

Android.Support.V4.App.Fragment fragment = new NavigationPage(new TestPage()).CreateSupportFragment(this);

问题:以前有人从Xamarin.Android本机打开Xamarin.Forms NavigationPage吗?有谁知道一种允许我们使用PushAsync和PopAsync函数的解决方法?

Question: Has anyone opened a Xamarin.Forms NavigationPage from Xamarin.Android native before? Does anyone know of a workaround that will allow us to use the PushAsync and PopAsync functions?

PS:这是 Github 操场，它是斯派克

推荐答案

目前该API尚无法实现.

As the API currently stands, it is not possible to implement.

我确实创建了一个 GitHub问题，所以如果可以的话并给它竖起大拇指来创建一种可能的方法，那太好了

I did create a GitHub issue, so if you could go there and give it a few thumbs up to create a possible way, that would be great

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