swift5距离传感器

override func viewDidLoad() {
        super.viewDidLoad()
        UIDevice.current.isProximityMonitoringEnabled = true
        
        NotificationCenter.default.addObserver(self, selector: #selector(stateChnage), name: UIDevice.proximityStateDidChangeNotification, object: nil)
    }
    @objc func stateChnage(){
        if UIDevice.current.isProximityMonitoringEnabled {
            debugPrint("有帅哥靠近")
        }else{
            debugPrint("有帅哥离开")
        }
    }
    deinit {
        NotificationCenter.default.removeObserver(self)
    }