有没有办法知道iOS设备何时锁定/解锁？

import UIKit

class ViewController: UIViewController {

    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 注册通知
        NotificationCenter.default.addObserver(self, selector: #selector(deviceWillLock), name: UIApplication.willResignActiveNotification, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(deviceDidUnlock), name: UIApplication.didBecomeActiveNotification, object: nil)
    }
    
    override func viewWillDisappear(_ animated: Bool) {
        super.viewWillDisappear(animated)
        
        // 取消注册通知
        NotificationCenter.default.removeObserver(self, name: UIApplication.willResignActiveNotification, object: nil)
        NotificationCenter.default.removeObserver(self, name: UIApplication.didBecomeActiveNotification, object: nil)
    }
    
    @objc func deviceWillLock() {
        // 设备即将锁定时的操作
        print("Device will lock")
    }
    
    @objc func deviceDidUnlock() {
        // 设备解锁时的操作
        print("Device did unlock")
    }
}