Csharp MAUI CoreApplication.MainView.CoreWindow.Dispatcher 方法在意外时间被调用

在WinUI3中，您应该使用DispatcherQueue.

这是一个基于默认毛伊岛项目的示例:

MainPage.xaml.cs个

namespace MauiApp1;

public partial class MainPage : ContentPage
{
    int count = 0;

    public MainPage()
    {
        InitializeComponent();
    }

    private void OnCounterClicked(object sender, EventArgs e)
    {
        count++;

        if (count == 1)
            CounterBtn.Text = $"Clicked {count} time";
        else
            CounterBtn.Text = $"Clicked {count} times";

        SemanticScreenReader.Announce(CounterBtn.Text);
    }

    private Microsoft.UI.Dispatching.DispatcherQueue? _dispatcherQueue;

    private async void OnAsyncClicked(object sender, EventArgs e)
    {
        _dispatcherQueue ??= Microsoft.UI.Dispatching.DispatcherQueue.GetForCurrentThread();

        await Task.Run(async () =>
        {
            while (true)
            {
                count++;
                
                _dispatcherQueue.TryEnqueue(() =>
                {
                    CounterBtn.Text = $"Clicked {count} times";
                    SemanticScreenReader.Announce(CounterBtn.Text);
                });

                await Task.Delay(1000);
            }
        });
    }
}