在Swift上单击文本字段时隐藏UIButton

@IBOutlet weak var button: UIButton!
@IBOutlet weak var textField: UITextField!

override func viewDidLoad() {
    super.viewDidLoad()
    
    // 添加一个手势识别器，当点击文本字段时调用hideButton方法
    let tapGesture = UITapGestureRecognizer(target: self, action: #selector(hideButton))
    textField.addGestureRecognizer(tapGesture)
}

@objc func hideButton() {
    button.isHidden = true
}