在 Xamarin iOS 的单页中强制横向模式?
Force Landscape mode in single page in Xamarin iOS?
我在 Android 和 iOS 中使用依赖服务强制横向显示单个页面,
这是 Android:
public class OrientationService : IOrientationService
{
public void Landscape()
{
((Activity)Forms.Context).RequestedOrientation = ScreenOrientation.Landscape;
}
public void Portrait()
{
((Activity)Forms.Context).RequestedOrientation = ScreenOrientation.Portrait;
}
}
它运行良好并且符合要求:强制横向模式,即使手中的设备方向是纵向,我需要为 iOS 实现相同的效果,试过这个(也试过注释代码):
public class OrientationService : IOrientationService
{
public void Landscape()
{
UIDevice.CurrentDevice.SetValueForKey(new NSNumber((int)UIInterfaceOrientation.LandscapeLeft), new NSString("orientation"));
//((AppDelegate)UIApplication.SharedApplication.Delegate).CurrentOrientation = UIInterfaceOrientationMask.Landscape;
//UIApplication.SharedApplication.SetStatusBarOrientation(UIInterfaceOrientation.LandscapeLeft, false);
}
public void Portrait()
{
UIDevice.CurrentDevice.SetValueForKey(new NSNumber((int)UIInterfaceOrientation.Portrait), new NSString("orientation"));
//((AppDelegate)UIApplication.SharedApplication.Delegate).CurrentOrientation = UIInterfaceOrientationMask.Portrait;
//UIApplication.SharedApplication.SetStatusBarOrientation(UIInterfaceOrientation.Portrait, false);
}
}
但这只会在设备处于横向模式时切换到横向,而不像 Android 版本
你应该在 iOS
中做更多的事情
in AppDelegate.cs
public bool allowRotation;
并重写方法
public override UIInterfaceOrientationMask GetSupportedInterfaceOrientations(UIApplication application, [Transient] UIWindow forWindow)
{
if(allowRotation==true)
{
return UIInterfaceOrientationMask.Landscape;
}
else
{
return UIInterfaceOrientationMask.Portrait;
}
}
in dependency service
public class OrientationService : IOrientationService
{
public void Landscape()
{
AppDelegate appDelegate = (AppDelegate)UIApplication.SharedApplication.Delegate;
appDelegate.allowRotation = true;
UIDevice.CurrentDevice.SetValueForKey(new NSNumber((int)UIInterfaceOrientation.LandscapeLeft), new NSString("orientation"));
//((AppDelegate)UIApplication.SharedApplication.Delegate).CurrentOrientation = UIInterfaceOrientationMask.Landscape;
//UIApplication.SharedApplication.SetStatusBarOrientation(UIInterfaceOrientation.LandscapeLeft, false);
}
public void Portrait()
{
AppDelegate appDelegate = (AppDelegate)UIApplication.SharedApplication.Delegate;
appDelegate.allowRotation = true;
UIDevice.CurrentDevice.SetValueForKey(new NSNumber((int)UIInterfaceOrientation.Portrait), new NSString("orientation"));
//((AppDelegate)UIApplication.SharedApplication.Delegate).CurrentOrientation = UIInterfaceOrientationMask.Portrait;
//UIApplication.SharedApplication.SetStatusBarOrientation(UIInterfaceOrientation.Portrait, false);
}
}
我在 Android 和 iOS 中使用依赖服务强制横向显示单个页面, 这是 Android:
public class OrientationService : IOrientationService
{
public void Landscape()
{
((Activity)Forms.Context).RequestedOrientation = ScreenOrientation.Landscape;
}
public void Portrait()
{
((Activity)Forms.Context).RequestedOrientation = ScreenOrientation.Portrait;
}
}
它运行良好并且符合要求:强制横向模式,即使手中的设备方向是纵向,我需要为 iOS 实现相同的效果,试过这个(也试过注释代码):
public class OrientationService : IOrientationService
{
public void Landscape()
{
UIDevice.CurrentDevice.SetValueForKey(new NSNumber((int)UIInterfaceOrientation.LandscapeLeft), new NSString("orientation"));
//((AppDelegate)UIApplication.SharedApplication.Delegate).CurrentOrientation = UIInterfaceOrientationMask.Landscape;
//UIApplication.SharedApplication.SetStatusBarOrientation(UIInterfaceOrientation.LandscapeLeft, false);
}
public void Portrait()
{
UIDevice.CurrentDevice.SetValueForKey(new NSNumber((int)UIInterfaceOrientation.Portrait), new NSString("orientation"));
//((AppDelegate)UIApplication.SharedApplication.Delegate).CurrentOrientation = UIInterfaceOrientationMask.Portrait;
//UIApplication.SharedApplication.SetStatusBarOrientation(UIInterfaceOrientation.Portrait, false);
}
}
但这只会在设备处于横向模式时切换到横向,而不像 Android 版本
你应该在 iOS
中做更多的事情in AppDelegate.cs
public bool allowRotation;
并重写方法
public override UIInterfaceOrientationMask GetSupportedInterfaceOrientations(UIApplication application, [Transient] UIWindow forWindow)
{
if(allowRotation==true)
{
return UIInterfaceOrientationMask.Landscape;
}
else
{
return UIInterfaceOrientationMask.Portrait;
}
}
in dependency service
public class OrientationService : IOrientationService
{
public void Landscape()
{
AppDelegate appDelegate = (AppDelegate)UIApplication.SharedApplication.Delegate;
appDelegate.allowRotation = true;
UIDevice.CurrentDevice.SetValueForKey(new NSNumber((int)UIInterfaceOrientation.LandscapeLeft), new NSString("orientation"));
//((AppDelegate)UIApplication.SharedApplication.Delegate).CurrentOrientation = UIInterfaceOrientationMask.Landscape;
//UIApplication.SharedApplication.SetStatusBarOrientation(UIInterfaceOrientation.LandscapeLeft, false);
}
public void Portrait()
{
AppDelegate appDelegate = (AppDelegate)UIApplication.SharedApplication.Delegate;
appDelegate.allowRotation = true;
UIDevice.CurrentDevice.SetValueForKey(new NSNumber((int)UIInterfaceOrientation.Portrait), new NSString("orientation"));
//((AppDelegate)UIApplication.SharedApplication.Delegate).CurrentOrientation = UIInterfaceOrientationMask.Portrait;
//UIApplication.SharedApplication.SetStatusBarOrientation(UIInterfaceOrientation.Portrait, false);
}
}