从 Appdelegate 打开 ViewModel [英] Open ViewModel from Appdelegate

问题描述

我正在尝试通过 Web-Url 在我的 Xamarin.Ios-Project 中打开特定视图.url-scheme 工作正常，我还检查了 AppDelegate 类中的 url，如下所示:

I am trying to open a specific view in my Xamarin.Ios-Project via a Web-Url. The url-scheme works fine and i also check the url in the AppDelegate class as shown below:

[Register("AppDelegate")]
public partial class AppDelegate : MvxApplicationDelegate
{
    // other methods ...

    public override bool OpenUrl(UIApplication application, NSUrl url, string sourceApplication, NSObject annotation)
    {
        if (url == null) return false;

        var uri = new Uri(url.ToString());
        if(uri.Host.Equals("myscheme-host"))
        {
            var param = GetParameters(uri);

            // What can i do here?
            ShowViewModel<MyViewModel>();

            return true;
        }
    }
}

如何从这一点上显示我的 Viewmodel?我试图在静态类中设置一个值，并在下一个视图加载时检查它.但是，当应用在后台运行时，用户点击了 Url-Scheme-Link，则不会引发任何事件(ViewDidLoad、ViewWillAppear、..).

How can I show my Viewmodel from this point? I tried to set a value in a static class and check it when the next view loads. But when the app is in the background bevore the user clicked the Url-Scheme-Link, no event (ViewDidLoad, ViewWillAppear, ..) will raise.

感谢任何帮助.非常感谢

Any help is appreciated. Thanks a lot

推荐答案

我正在使用自定义方案来启动一个应用程序(类似于 myscheme-host:xxxx)，所以我会在 OpenUrl 上写下这样的内容:

I am using a custom scheme to start an application (something like myscheme-host:xxxx) so what I would write on the OpenUrl is something like this:

    public override bool OpenUrl(UIApplication application, NSUrl url, string sourceApplication, NSObject annotation)
    {
        if (url.AbsoluteString.StartsWith("myscheme-host:"))
        {
            this.window.RootViewController = new MySchemeViewController();

在您的情况下，您可能会从xxxx"参数创建一个新的视图模型并将该视图模型传递给视图控制器(无论是直接来自代码还是通过将视图模型与控制器配对的解析器).

In your case you would probably create a new view model from the "xxxx" parameters and pass that view model to a view controller (whether that is straight from the code or through a resolver that pairs the view model with a controller).

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