Xamarin iOS ObserveOrientationDidChange Landscape 或 Portrait [英] Xamarin iOS ObserveOrientationDidChange Landscape or Portrait
本文介绍了Xamarin iOS ObserveOrientationDidChange Landscape 或 Portrait的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我需要检测用户何时将设备旋转到横向.我可以使用以下代码检测方向何时发生变化:
I need to detect when the user rotate the device to Landscape orientation. I can detect when the orientation changed with the code below:
UIDevice.CurrentDevice.BeginGeneratingDeviceOrientationNotifications();
this.orientationObserver = UIDevice.Notifications.ObserveOrientationDidChange(MyRotationCallback);
private void MyRotationCallback(object sender, NSNotificationEventArgs e)
{
// Landscape or Portrait ?
}
它可以工作,但我不知道它是改为横向还是纵向.我如何才能检测到这一点?
It works, but I can't tell if it was changed to landscape or portrait. How I can I detect this?
推荐答案
检查属性:
UIDevice.CurrentDevice.Orientation
值:
LandscapeLeft
PortraitUpsideDown
LandscapeRight
Portrait
示例设置:
在您的 ViewDidLoad
(或类似的)中:
Foundation.NSNotificationCenter.DefaultCenter.AddObserver(new NSString("UIDeviceOrientationDidChangeNotification"), DeviceRotated);
委托/行动:
void DeviceRotated(NSNotification notification)
{
System.Diagnostics.Debug.WriteLine(UIDevice.CurrentDevice.Orientation);
}
输出:
LandscapeLeft
PortraitUpsideDown
LandscapeRight
Portrait
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