iOS:键盘的头是存储联想词的，如果我点击了这个词，哪种方法在监听点击事件？

func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool {
    // 判断是否是联想词点击事件
    if range.length == 0 && string.isEmpty {
        let selectedWord = (textField.text as NSString?)?.substring(with: range)
        // 处理联想词点击事件
        handleSelectedWord(selectedWord)
    }
    return true
}

func handleSelectedWord(_ selectedWord: String?) {
    // 处理联想词点击事件的逻辑
    // ...
}

func textView(_ textView: UITextView, shouldChangeTextIn range: NSRange, replacementText text: String) -> Bool {
    // 判断是否是联想词点击事件
    if range.length == 0 && text.isEmpty {
        let selectedWord = (textView.text as NSString?)?.substring(with: range)
        // 处理联想词点击事件
        handleSelectedWord(selectedWord)
    }
    return true
}

func handleSelectedWord(_ selectedWord: String?) {
    // 处理联想词点击事件的逻辑
    // ...
}