Windows Phone 8页面方向

Question

当页面已加载或页面正在加载时，如何检测方向？我实现了OrientationChanged方法。但是，当我将第一页设置为景观时，第二页不会触发此方法。页面是在景观模式，但UI不是。我的意思是，页面定位是可以的，但是OrientationChanged是否会被触发？我在此方法中更改UI对象的外观。如果没有触发，UI将显示为纵向模式。

private void PhoneApplicationPage_OrientationChanged(object sender, OrientationChangedEventArgs e)
{
    if (e.Orientation == PageOrientation.Landscape || e.Orientation == PageOrientation.LandscapeLeft || e.Orientation == PageOrientation.LandscapeRight)
    {
        SwitchPanel.Margin = new Thickness(12, 100, 250, 0);
        StatusPanel.HorizontalAlignment = System.Windows.HorizontalAlignment.Right;
    }
    else
    {
        SwitchPanel.Margin = new Thickness(12, 100, 12, 0);
        StatusPanel.HorizontalAlignment = System.Windows.HorizontalAlignment.Stretch;
    }
}

我怎样才能解决这个问题？

Answer 1

只需将代码放在一个不同的方法中，并从OrientationChanged和Loaded事件调用此方法：

private void PhoneApplicationPage_Loaded(object sender, RoutedEventArgs e)
{
    this.SetOrientation(this.Orientation);
}

private void PhoneApplicationPage_OrientationChanged(object sender, OrientationChangedEventArgs e)
{
    this.SetOrientation(e.Orientation);
}

private void SetOrientation(PageOrientation orientation)
{
    if (orientation == PageOrientation.Landscape || orientation == PageOrientation.LandscapeLeft || orientation == PageOrientation.LandscapeRight)
    {
        SwitchPanel.Margin = new Thickness(12, 100, 250, 0);
        StatusPanel.HorizontalAlignment = System.Windows.HorizontalAlignment.Right;
    }
    else
    {
        SwitchPanel.Margin = new Thickness(12, 100, 12, 0);
        StatusPanel.HorizontalAlignment = System.Windows.HorizontalAlignment.Stretch;
    }
}

Answer 2

你把事件连接到事件处理程序了吗？构造函数中应该有类似于以下内容的内容.

this.OrientationChanged += PhoneApplicationPage_OrientationChanged;