如何在UITextField的iOS键盘上检测大写锁定键敲击？

NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(_:)), name: UIResponder.keyboardWillShowNotification, object: nil)

@objc func keyboardWillShow(_ notification: Notification) {
    if let userInfo = notification.userInfo,
       let keyboardFrame = userInfo[UIResponder.keyboardFrameEndUserInfoKey] as? CGRect {
        let isCapsLockOn = keyboardFrame.intersects(CGRect(x: 0, y: UIScreen.main.bounds.height - 44, width: UIScreen.main.bounds.width, height: 44))
        if isCapsLockOn {
            print("大写锁定键被按下")
            // 在这里执行相应的逻辑操作
        }
    }
}

NotificationCenter.default.removeObserver(self, name: UIResponder.keyboardWillShowNotification, object: nil)