Xamarin.Forms菜鸟笔记--4.弹出框

因为不同平台弹出效果不一样，Xamarin只有简单的弹出样式
官方地址：https://docs.microsoft.com/zh-cn/xamarin/xamarin-forms/user-interface/pop-ups

当我们需要加载框的时候发现这完全不够用
所以，我用了Acr.UserDialogs包
参考链接：https://www.nuget.org/packages/Acr.UserDialogs/

不过在.Droid中需要适配一下，不然会报一下错误
In android, you must call UserDialogs.Init(Activity) from your first activity OR UserDialogs.Init(App) from your custom application OR provide a factory function to get the current top activity via UserDialogs.Init(() => supply top activity)

方法：
在MainActivity.cs中加一句UserDialogs.Init(this);

        protected override void OnCreate(Bundle savedInstanceState)
        {
            UserDialogs.Init(this);
            
            TabLayoutResource = Resource.Layout.Tabbar;
            ToolbarResource = Resource.Layout.Toolbar;

            base.OnCreate(savedInstanceState);

            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            global::Xamarin.Forms.Forms.Init(this, savedInstanceState);
            LoadApplication(new App());
        }

参考：https://stackoverflow.com/questions/40218229/using-userdialogs-in-android