ios - 如何在标签中设置 Action ？

Question

这是我的代码:

在 viewDidLoad 中添加手势

let tap = UITapGestureRecognizer(target: self, action: #selector(tapLabel(tap:)))
            toastLabel.addGestureRecognizer(tap)
            toastLabel.isUserInteractionEnabled = true

func showLongToast( message: String) {        
    toastLabel = UILabel(frame: CGRect(x: controller.view.frame.origin.x + 20, y: controller.view.frame.size.height-200, width: controller.view.frame.size.width - 40, height: 125))
    toastLabel.numberOfLines = 0
    toastLabel.textAlignment = .center
    toastLabel.contentMode = .center
    toastLabel.backgroundColor = UIColor.white.withAlphaComponent(0.7)
    toastLabel.textColor = UIColor(red: 74/255, green: 74/255, blue: 74/255, alpha: 1)
    toastLabel.font = UIFont(name: "Montserrat-Medium", size: 15.0)
    let trimmedString = message.trimmingCharacters(in: .whitespacesAndNewlines)
    let string = NSMutableAttributedString(string: trimmedString)
    string.setColorForText("Enter Manually", with: #colorLiteral(red: 1, green: 0.4196078431, blue: 0.1812392979, alpha: 1))
    toastLabel.attributedText = string
    toastLabel.layer.cornerRadius = 25
    toastLabel.clipsToBounds = true
    controller.view.addSubview(toastLabel)
    controller.view.bringSubviewToFront(toastLabel)
  }

我已经从 viewController 调用了这个函数:

showLongToast(message: "Please Hold the lens or choose you can Enter Manually.", controller: self)

但是 toast 消息不能设置 Action 了？有什么想法请发表评论。谢谢。

Answer 1

这就是你的 viewDidLoad() 和 tapLabel(tap:) 的样子，

override func viewDidLoad() {
    super.viewDidLoad()
    self.showLongToast(message: "Please Hold the lens or choose you can Enter Manually.", controller: self)
    let tap = UITapGestureRecognizer(target: self, action: #selector(tapLabel(tap:)))
    toastLabel.addGestureRecognizer(tap)
    toastLabel.isUserInteractionEnabled = true
}

@objc func tapLabel(tap: UITapGestureRecognizer) {
    print("tapped..!!!")
}

并且 showLongToast 的签名不会与您的代码一起编译。应该是这样的，

func showLongToast( message: String, controller: UIViewController) {
    //your code here...
}