ios - 带有按钮 addTarget 事件的标签不会触发

Question

我在表格 View 单元格中有一个标签。标签有文本文本的结尾有一个按钮，该按钮代表用户喜欢的按钮。一切正常，但问题是 hitForLike 未触发。按钮单击事件未触发。我错过了什么吗

var titleLabel : UILabel = {
        var label = UILabel()
        label.font = UIFont.systemFont(ofSize: 21)
        label.translatesAutoresizingMaskIntoConstraints = false
        return label
    }()    

func hitForLike(_ sender : UIButton){

        print("i miss you ....")

    }

func titleWithLikeButton(title:String,isFavorite : Bool){

          titleLabel.text = title

        let button = UIButton(frame: CGRect(x: titleLabel.intrinsicContentSize.width, y: 0, width: 44, height: 44))

        //setup your button here
        button.setTitleColor(UIColor.red, for: UIControlState.normal)
        let image = UIImage(named: "heart-empty.png")
        button.setImage(image, for: UIControlState.normal)

        button.addTarget(self, action: #selector(hitForLike(_:)), for: UIControlEvents.touchUpInside)

        //Add the button to the text label
        titleLabel.addSubview(button)

}

Answer 1

我认为您需要在标签上启用用户交互，如下所示:

titleLabel.isUserInteractionEnabled = true

所以你的整个函数最终看起来像这样:

func titleWithLikeButton(title:String,isFavorite : Bool){
    titleLabel.text = title
    titleLabel.isUserInteractionEnabled = true //enable userinteraction

    let button = UIButton(frame: CGRect(x: titleLabel.intrinsicContentSize.width, y: 0, width: 44, height: 44))

    //setup your button here
    button.setTitleColor(UIColor.red, for: UIControlState.normal)
    let image = UIImage(named: "heart-empty.png")
    button.setImage(image, for: UIControlState.normal)

    button.addTarget(self, action: #selector(hitForLike(_:)), for: UIControlEvents.touchUpInside)

    //Add the button to the text label
    titleLabel.addSubview(button)
}

希望对您有所帮助。