DisplayPromptAsync 在 Uno Platform for Xamarin Forms WASM 上挂起

Question

我有一个适用于 UWP 的应用程序。它包含这段代码：

        private async void Button_Clicked(object sender, EventArgs e)
        {
            var response1 = await App.Current.MainPage.DisplayPromptAsync("", "message1", "OK", "Cancel", "");
            if (string.IsNullOrEmpty(response1)) return;
            var response2 = await App.Current.MainPage.DisplayPromptAsync("", "message2", "OK", "Cancel", "");
            if (string.IsNullOrEmpty(response2)) return;
        }

代码在 UWP 上正常运行。然而，在 Uno for WASM 上，只有第一个响应被正确捕获。第二个响应完全挂起 Web 应用程序。

查看控制台，可能是线程错误，AFTER 我在第一次提示时按了确定按钮：

  Failed to raise 'PointerReleasedEvent': System.InvalidOperationException
dotnet.js:1         at System.Threading.Tasks.TaskCompletionSource`1[TResult].SetResult (TResult result) [0x00009] in /__w/1/s/mono/external/corefx/src/Common/src/CoreLib/System/Threading/Tasks/TaskCompletionSource.cs:298 
dotnet.js:1         at Windows.UI.Xaml.Controls.ContentDialog.<ProcessPrimaryButton>g__Complete|52_0 (Windows.UI.Xaml.Controls.ContentDialogButtonClickEventArgs a) [0x00022] in C:\a\s\src\Uno.UI\UI\Xaml\Controls\ContentDialog\ContentDialog.cs:355 
dotnet.js:1         at Windows.UI.Xaml.Controls.ContentDialog.ProcessPrimaryButton () [0x0002d] in C:\a\s\src\Uno.UI\UI\Xaml\Controls\ContentDialog\ContentDialog.cs:365 
dotnet.js:1         at Windows.UI.Xaml.Controls.ContentDialog.OnPrimaryButtonClicked (System.Object sender, Windows.UI.Xaml.RoutedEventArgs e) [0x00000] in C:\a\s\src\Uno.UI\UI\Xaml\Controls\ContentDialog\ContentDialog.cs:291 
dotnet.js:1         at (wrapper delegate-invoke) <Module>.invoke_void_object_RoutedEventArgs(object,Windows.UI.Xaml.RoutedEventArgs)
dotnet.js:1         at Windows.UI.Xaml.Controls.Primitives.ButtonBase.OnClick (Windows.UI.Xaml.Input.PointerRoutedEventArgs args) [0x00000] in C:\a\s\src\Uno.UI\UI\Xaml\Controls\Primitives\ButtonBase\ButtonBase.cs:304 
dotnet.js:1         at Windows.UI.Xaml.Controls.Primitives.ButtonBase.RaiseClick (Windows.UI.Xaml.Input.PointerRoutedEventArgs args) [0x00000] in C:\a\s\src\Uno.UI\UI\Xaml\Controls\Primitives\ButtonBase\ButtonBase.cs:294 
dotnet.js:1         at Windows.UI.Xaml.Controls.Primitives.ButtonBase.OnPointerReleased (Windows.UI.Xaml.Input.PointerRoutedEventArgs args) [0x00065] in C:\a\s\src\Uno.UI\UI\Xaml\Controls\Primitives\ButtonBase\ButtonBase.cs:266 
dotnet.js:1         at Windows.UI.Xaml.Controls.Control+<>c.<.cctor>b__346_11 (System.Object sender, Windows.UI.Xaml.Input.PointerRoutedEventArgs args) [0x00000] in C:\a\s\src\Uno.UI\UI\Xaml\Controls\Control\Control.cs:865 
dotnet.js:1         at Windows.UI.Xaml.UIElement.InvokeHandler (System.Object handler, Windows.UI.Xaml.RoutedEventArgs args) [0x000e7] in C:\a\s\src\Uno.UI\UI\Xaml\UIElement.RoutedEvents.cs:826 
dotnet.js:1         at Windows.UI.Xaml.UIElement.RaiseEvent (Windows.UI.Xaml.RoutedEvent routedEvent, Windows.UI.Xaml.RoutedEventArgs args, Windows.UI.Xaml.UIElement+BubblingContext ctx) [0x0007f] in C:\a\s\src\Uno.UI\UI\Xaml\UIElement.RoutedEvents.cs:613 
dotnet.js:1         at Windows.UI.Xaml.UIElement.RaisePointerEvent (Windows.UI.Xaml.RoutedEvent evt, Windows.UI.Xaml.Input.PointerRoutedEventArgs args) [0x0000d] in C:\a\s\src\Uno.UI\UI\Xaml\UIElement.Pointers.cs:933

那我做错了什么？如何在运行 on Uno 中正确显示两个连续的事件提示？

Answer 1

这 is/was Uno 平台中的错误。

如果有人再次遇到这个问题，只需将 Uno.UI 软件包更新到最新版本（3.8.0 或更高版本）即可。

DisplayPromptAsync 在 Uno Platform for Xamarin Forms WASM 上挂起

DisplayPromptAsync hangs on Uno Platform for Xamarin Forms WASM

c#

xamarin.forms

uno-platform