旋转iPhone,并实例化一个新的UIViewController？

// 获取当前设备的方向
let orientation = UIDevice.current.orientation

// 创建一个新的UIViewController
let newViewController = UIViewController()

// 设置新的UIViewController的view属性
newViewController.view.frame = CGRect(x: 0, y: 0, width: 320, height: 568)

// 创建旋转屏幕视图
let rotationView = UIView(frame: CGRect(x: 0, y: 0, width: 320, height: 568))
rotationView.backgroundColor = UIColor.red

// 将旋转屏幕视图添加到新的UIViewController中
newViewController.view.addSubview(rotationView)

// 将新的UIViewController添加到我们的应用程序中
self.addChildViewController(newViewController)
self.view.addSubview(newViewController.view)

// 旋转屏幕
let animationDuration = 0.3
UIDevice.current.orientation.setDeviceOrientation(orientation, duration: animationDuration)

// 移除新的UIViewController
newViewController.willMoveToParentViewController(nil)
newViewController.removeFromParentViewController()