手动创建UIDeviceOrientationDidChangeNotification事件

Question

我们可以手动创建UIDeviceOrientationDidChangeNotification事件吗？

在AppDelegate.swift我有

func application(_ application: UIApplication, supportedInterfaceOrientationsFor window: UIWindow?) -> UIInterfaceOrientationMask 

此方法将返回结果取决于用户设置。

它运行良好但用户需要在应用程序运行期间更改设置。

但是用户旋转设备后设置会生效，我想要的是让它立即生效

Answer 1

使用NotificationCenter -

setupRotationListener()

/// Setup rotation listener
    func setupRotationListener() -> Void {
        NotificationCenter.default.addObserver(self, selector: #selector(self.rotated), name: NSNotification.Name.UIDeviceOrientationDidChange, object: nil)

    }

    /// Remove rotationListener
    func removeRotationlistener() -> Void {
        NotificationCenter.default.removeObserver(self, name: NSNotification.Name.UIDeviceOrientationDidChange, object: nil)

    }

    /// Rotate camera
    func rotated() {
        //do your task 
 if UIDevice.current.orientation.isLandscape {
        print("Landscape")
    } else {
        print("Portrait")
    }
    }

Answer 2

I found a solution from stackoverflow

他的解决方案真的解决了我的问题：

在iOS <= 4和iOS> = 6中：

UIViewController *vc = [[UIViewController alloc]init];
[self presentModalViewController:vc animated:NO];
[self dismissModalViewControllerAnimated:NO];
[vc release];

在iOS 5中：

UIWindow *window = [[UIApplication sharedApplication] keyWindow];
UIView *view = [window.subviews objectAtIndex:0];
[view removeFromSuperview];
[window addSubview:view];