WinUI 3 全屏转最大化窗口抖动问题及修复咨询

问题原因 #

从全屏模式切换回重叠式窗口时，默认会先进入还原状态，再手动切换最大化会导致视觉抖动。核心解决思路是跳过中间的还原状态，直接从全屏过渡到最大化。

修改后的代码实现 #

替换原FullScreenButton_Click方法为以下代码：

private void FullScreenButton_Click(object sender, RoutedEventArgs e)
{
    if (AppWindow.Presenter is OverlappedPresenter overlappedPresenter)
    {
        if (overlappedPresenter.State == OverlappedPresenterState.Maximized)
        {
            AppWindow.SetPresenter(AppWindowPresenterKind.FullScreen);
        }
    }
    else if (AppWindow.Presenter is FullScreenPresenter)
    {
        // 切换到重叠式窗口 presenter
        var overlappedPresenter = AppWindow.SetPresenter(AppWindowPresenterKind.Overlapped) as OverlappedPresenter;
        // 立即触发最大化，跳过还原状态
        overlappedPresenter?.Maximize();
    }
}

原理说明 #

切换到OverlappedPresenter后立刻调用Maximize()，系统会合并这两个窗口状态变更操作，不会渲染中间的还原状态，从而避免视觉闪烁。此操作的连贯性确保窗口直接从全屏模式过渡到最大化模式。

内容的提问来源于stack exchange，提问作者Socrates