swift - 单元格中的 2 个项目具有相同的 tapGestureRecognizer (swift)

Question

在我的应用程序中，我有一个带有个人资料图像和用户名标签的表格 View 。如果你点击2个之一那么需要做这个功能:

 func goToProfileScreen(gesture: UITapGestureRecognizer) {
    self.performSegueWithIdentifier("profile", sender: nil)
 }

但是，如果我尝试在 cellForRowAtIndexPath 中实现此功能，它仅在我最后一次添加它时有效。

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {

        if let cell = tableView.dequeueReusableCellWithIdentifier("NewsCell") as? NewsCell {
            let post = self.posts[indexPath.row]

            cell.request?.cancel()

            let profileTapRecognizer = UITapGestureRecognizer(target: self, action: #selector(NewsVC.goToProfileScreen(_:)))
            profileTapRecognizer.numberOfTapsRequired = 1
            // profileTapRecognizer.delegate = self

            cell.profileImg.tag = indexPath.row
            cell.profileImg.userInteractionEnabled = true
            cell.profileImg.addGestureRecognizer(profileTapRecognizer)

            cell.usernameLabel.tag = indexPath.row
            cell.usernameLabel.userInteractionEnabled = true
            cell.usernameLabel.addGestureRecognizer(profileTapRecognizer)

            var img: UIImage?

            if let url = post.profileImageURL {
                if url != "" {
                    img = NewsVC.imageCache.objectForKey(url) as? UIImage
                }
            }

            cell.configureCell(post, img: img)
            cell.selectionStyle = .None

            return cell

        } else {

            return NewsCell()
        }
    }

所以现在它适用于用户名标签。如果我将 usernamelabel 首先放在代码中，然后放在 profileImg 中，那么它只适用于 profileImg？

我怎样才能让它对他们俩都起作用？

Answer 1

您需要使用 2 个不同的 tapRecognizer，因为 UITapGestureRecognizer 只能附加到一个 View 。(“它们是附加到 View 的对象”，Apple Doku)

let profileTapRecognizer1 = UITapGestureRecognizer(target: self, action: #selector(NewsVC.goToProfileScreen(_:)))
let profileTapRecognizer2 = UITapGestureRecognizer(target: self, action: #selector(NewsVC.goToProfileScreen(_:)))
profileTapRecognizer1.numberOfTapsRequired = 1
profileTapRecognizer2.numberOfTapsRequired = 1

// profileTapRecognizer1.delegate = self
// profileTapRecognizer2.delegate = self

cell.profileImg.tag = indexPath.row
cell.profileImg.userInteractionEnabled = true
cell.profileImg.addGestureRecognizer(profileTapRecognizer1)

cell.usernameLabel.tag = indexPath.row
cell.usernameLabel.userInteractionEnabled = true
cell.usernameLabel.addGestureRecognizer(profileTapRecognizer2)