參考源

1. 監(jiān)聽設(shè)備旋轉(zhuǎn)方向 通過設(shè)備單例實(shí)現(xiàn)
   設(shè)備方向是根據(jù)Home鍵確定的
   必須先開始生成設(shè)備旋轉(zhuǎn)方向的通知 然后監(jiān)聽通知 才可以處理設(shè)備的旋轉(zhuǎn)

   //開啟設(shè)備方向通知
        if !UIDevice.current.isGeneratingDeviceOrientationNotifications {
            UIDevice.current.beginGeneratingDeviceOrientationNotifications()
        }
 //注冊(cè)通知   
        NotificationCenter.default.addObserver(self, selector: #selector(handleDeviceOrientationChange(notification:)), name: .UIDeviceOrientationDidChange, object: nil)
 func handleDeviceOrientationChange(notification:NSNotification) -> Void {
        
        //獲取設(shè)備方向
       //this will return UIDeviceOrientationUnknown unless device orientation notifications are being generated.
        let currentOri = UIDevice.current.orientation
        
        switch currentOri {
        case .faceUp:
            print("faceUp");
        case .faceDown:
            print("faceDown")
        case .landscapeLeft:
            print("landsapeLeft")
        case .landscapeRight:
            print("landscapeRight")
        case .portrait:
            print("portraint")
        case .portraitUpsideDown:
            print("portraintUpsideDown")
        case .unknown:
            print("unknown")
        }
    }
//移除通知
    deinit {
        //取消監(jiān)聽
        NotificationCenter.default.removeObserver(self)
        //關(guān)閉設(shè)備方向通知
        UIDevice.current.endGeneratingDeviceOrientationNotifications()
    }

2. 監(jiān)聽屏幕旋轉(zhuǎn)方向，
   如果要改變界面UI的話，大多情況這個(gè)更有用，因?yàn)槿绻O(shè)備發(fā)生旋轉(zhuǎn)，但屏幕并未旋轉(zhuǎn)就會(huì)出問題。
   屏幕方向是根據(jù)狀態(tài)欄來判斷的

//        用戶界面方向是參考狀態(tài)欄方向的UIApplication.shared.statusBarOrientation
//        注冊(cè)通知
        NotificationCenter.default.addObserver(self, selector: #selector(handleStatusBarOrientationChange(notification:)), name: NSNotification.Name.UIApplicationDidChangeStatusBarOrientation, object: nil)
    }
    
    
    func handleStatusBarOrientationChange(notification:NSNotification) -> Void {
        
       let interfaceor =  UIApplication.shared.statusBarOrientation
        
        switch interfaceor {
        case .portrait:
            print("portrait")
        case .portraitUpsideDown:
            print("portraintUpsideDown")
        case .landscapeLeft:
            print("landsacpeLeft")
        case .landscapeRight:
            print("landscapeRight")
        case .unknown:
            print("unknown")
        }
    }

控制器中常用的控制界面方向的方法

//    是否支持旋轉(zhuǎn)
    override var shouldAutorotate: Bool{
        return true
    }
//    屏幕支持的旋轉(zhuǎn)方向 UIInterfaceOrientation.portrait 表示僅支持豎直方向
    override var supportedInterfaceOrientations: UIInterfaceOrientationMask{
        
        return UIInterfaceOrientationMask.all
    }
    
//    由模態(tài)推出的視圖控制器 優(yōu)先支持的屏幕方向
    override var preferredInterfaceOrientationForPresentation: UIInterfaceOrientation{
        return UIInterfaceOrientation.portrait
    }