Question

将方向更改动画添加到Windows Phone 8应用程序的最简单方法是什么？我感兴趣的东西看起来像本地应用程序，如消息，日历等。我一直在寻找一个快速简单的解决方案，我发现唯一的工作是NuGet中的DynamicOrientionChanges库，但它在Windows上的帧速率有一个巨大的问题电话8。

Answer 1

您可以使用Windows.Phone.Toolkit并处理OrientationChangedEvent，如下所示：

http://mobileworld.appamundi.com/blogs/andywigley/archive/2010/11/23/windows-phone-7-page-orientation-change-animations.aspx

我将在此处复制链接文章的源代码部分，以防页面脱机。它包含用于跟踪当前方向的附加逻辑，以便动画与更改匹配：

public partial class MainPage : PhoneApplicationPage
{
    PageOrientation lastOrientation;

    // Constructor
    public MainPage()
    {
        InitializeComponent();

        this.OrientationChanged += new EventHandler<OrientationChangedEventArgs>(MainPage_OrientationChanged);

        lastOrientation = this.Orientation;
    }

    void MainPage_OrientationChanged(object sender, OrientationChangedEventArgs e)
    {
        PageOrientation newOrientation = e.Orientation;
        Debug.WriteLine("New orientation: " + newOrientation.ToString());

        // Orientations are (clockwise) 'PortraitUp', 'LandscapeRight', 'LandscapeLeft'

        RotateTransition transitionElement = new RotateTransition();

        switch (newOrientation)
        {
            case PageOrientation.Landscape:
            case PageOrientation.LandscapeRight:
                // Come here from PortraitUp (i.e. clockwise) or LandscapeLeft?
                if (lastOrientation == PageOrientation.PortraitUp)
                    transitionElement.Mode = RotateTransitionMode.In90Counterclockwise;
                else
                    transitionElement.Mode = RotateTransitionMode.In180Clockwise;
                break;
            case PageOrientation.LandscapeLeft:
                // Come here from LandscapeRight or PortraitUp?
                if (lastOrientation == PageOrientation.LandscapeRight)
                    transitionElement.Mode = RotateTransitionMode.In180Counterclockwise;
                else
                    transitionElement.Mode = RotateTransitionMode.In90Clockwise;
                break;
            case PageOrientation.Portrait:
            case PageOrientation.PortraitUp:
                // Come here from LandscapeLeft or LandscapeRight?
                if (lastOrientation == PageOrientation.LandscapeLeft)
                    transitionElement.Mode = RotateTransitionMode.In90Counterclockwise;
                else
                    transitionElement.Mode = RotateTransitionMode.In90Clockwise;
                break;
            default:
                break;
        }

        // Execute the transition
        PhoneApplicationPage phoneApplicationPage = (PhoneApplicationPage)(((PhoneApplicationFrame)Application.Current.RootVisual)).Content;
        ITransition transition = transitionElement.GetTransition(phoneApplicationPage);
        transition.Completed += delegate
        {
            transition.Stop();
        };
        transition.Begin();

        lastOrientation = newOrientation;
    }
}

WP8方向更改动画

1 个答案: