手动创建UIDeviceOrientationDidChangeNotification事件

Question

我们可以手动创建UIDeviceOrientationDidChangeNotification事件吗？

在AppDelegate.swif中，我有

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

此方法将根据用户设置返回结果。

它工作正常，但用户需要在应用程序运行过程中更改设置。

但设置会在用户旋转设备后生效，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

他的解决方案是真正解决我的问题：

iOS <= 4和iOS >= 6中的：

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

iOS 5中的：

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