以编程方式设置目标时，UITapGestureRecognizer 不起作用

Question

我正在尝试在 UITableViewCell 内的 UIImageView 上添加点击事件侦听器，所以我在其上添加了一个 UITapGestureRecognizer 并使用了此代码

override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        ...
        cell.editTap.addTarget(self, action: #selector(ProfileTVC.editTapped(sender:))) 
        //editTap is an UITapGestureRecognizer
        ...
    }
}

func editTapped(sender: UITapGestureRecognizer) {
    print("tapped")
    if sender.state == UIGestureRecognizerState.ended {
        let tapLocation = sender.location(in: self.tableView)
        if let tapIndexPath = self.tableView.indexPathForRow(at: tapLocation) {
            if fields[tapIndexPath.row].field == "languages_spoken" {

            } else if fields[tapIndexPath.row].field == "password" {

            } else {

            }
        }
    }
}

但是当我点击我的 UIImageView 时，editTapped 没有被调用。 UIImageView 的用户交互也已启用

Answer 1

您添加的是目标而不是手势

  let tapPress = UITapGestureRecognizer(target: self, action: #selector(ProfileTVC. editTapped(_:)))
 cell.editTap.addGestureRecognizer(tapPress)

//

@objc func editTapped(_ gestureRecognizer:UIGestureRecognizer)
{ 


}

Answer 2

您无法使用 "addTarget"

添加 UITapGestureRecognizer

在您的 CellForRowAt 函数中使用此方法更改 addTarget 方法；

let tapGesture = UITapGestureRecognizer(target: self, action: #selector(ProfileTVC.editTapped(sender:)))
cell.editTap.addGestureRecognizer(tapGesture) //editTap should be the ImageView inside cell.

以编程方式设置目标时，UITapGestureRecognizer 不起作用

UITapGestureRecognizer not working when setting target programmatically

ios

uitapgesturerecognizer

swift