Question

我在tableview单元格中有一个标签。标签有文本文本末尾有一个按钮，该按钮代表用户喜欢。一切都很好，但问题是hitForLike没有火。按钮点击事件不火。我什么都错过了

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互动，例如：

titleLabel.isUserInteractionEnabled = true

所以你的整个功能看起来像这样：

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)
}

希望有所帮助。

Answer 2

您必须在func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell中设置单元格按钮目标，如下所示：

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {


        let cell = tableViewForPAC.dequeueReusableCell( withIdentifier: "TableViewCell", for: indexPath) as! TableViewCell
        cell.yourButton.tag = indexpath.row
        cell.yourButton.addTarget(self, action: #selector(hitForLike(_:)), for: UIControlEvents.touchUpInside)
       return cell

 }

func hitForLike(_ sender : UIButton){

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

    }

标签与按钮addTarget事件不会激发

2 个答案: