Question

我想实现一个功能，如果在tableviewCell中点击了profileImage，则segue到detailView。我添加tapGesture但我仍然无法弄清楚如何让indexPath传递数据。我试过这样但应用程序会崩溃。

    override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

        if segue.identifier == "detailSegue" {
            let next: DetailViewController = segue.destination as! DetailViewController
          // pattern1
 let indexPath = tableView.indexPath(for: sender as! CustomTableViewCell)
         // pattern2
        let indexPath = tableView.indexPathForSelectedRow! as NSIndexPath

            next.data = datas[indexPath.row]
        }
    }

我该如何解决这个问题？提前谢谢！

Answer 1

如果您将UITapGestureRecognizer添加到UIImageView，请不要忘记将isUserInteractionEnabled属性设置为true。

创建一个变量来存储选定的indexPath.row

var selectedCell:Int!

在cellForRow方法中，向图像视图添加手势。

let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.tapBtnAction(_:)))
cell.imageView.tag = indexPath.row
cell.imageView.addGestureRecognizer(tapGesture)

在目标方法中执行segue

func tapBtnAction(_ sender: UITapGestureRecognizer) {
    print("\(sender.view.tag) Tapped")
    self.selectedCell = sender.view.tag
    self.performSegueWithIdentifier("detailSegue", sender: self)
}

在prepareforsegue方法中从数组中获取数据。

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {

   if segue.identifier == "detailSegue" {
      let next: DetailViewController = segue.destination as! DetailViewController
       next.data = datas[self.selectedCell]
   }
}

Answer 2

解决方案1：使用touchBegun方法，确保启用imageView UserInteraction

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {
    let touch = touches.first
      if let cell = touch?.view?.superview?.superview as? YourCellClass {
        let indexPath = yourTablView.indexPath(for: cell)
    //Do whatever you want
    }
}

解决方案2：您可以使用按钮。

@IBAction func onBtnClick(_ sender : UIButton) {
    if let cell = sender.superview?.superview as? UITableViewCell {
        let indexPath = tbl_songsInfo.indexPath(for: cell)
    //Do whatever you want
    }
}

解决方案3：与上述相同，但使用sender.tag

@IBAction func onBtnClick(_ sender : UIButton) {
    let data = yourDataArray[sender.tag] 
    //Do whatever you want
}

Answer 3

我已经制作了一个示例项目来演示解决方案。它工作得非常好。看到gif！

您可以使用该链接下载示例项目代码 https://drive.google.com/file/d/1zF8Uq2H6eQYyrHU6KqnZu7b5cU_HtZY0/view?usp=sharing

实际上，您必须为图像添加手势识别器并将动作附加到此手势。请参阅cellforRowAt的实现。

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

 let cell = tableView.dequeueReusableCell(withIdentifier:"TableViewCellUser") as! TableViewCellUser
 //handle image and its gesture

 cell.imgUser.image = userImagesArray[indexPath.row]
 //enable the interaction so that touch could be captured.
 cell.imgUser.isUserInteractionEnabled = true
 let gesture = UITapGestureRecognizer(target: self, action:  #selector(userImageTapped(gesture:)))
 gesture.numberOfTouchesRequired = 1
 gesture.delegate = self as? UIGestureRecognizerDelegate
 cell.imgUser.tag = indexPath.row
 cell.imgUser.addGestureRecognizer(gesture)
 //handle label
 cell.lblUserName.text = userNames[indexPath.row]
 return cell

}

//用户点击操作

guard let indexPathRow = gesture.view?.tag else {
  return
}
print(indexPathRow)
guard indexPathRow >= 0 else {
  print("Array index must be greater than zero. Going to  return")
  return
}
selectedUserImage = userImagesArray[indexPathRow]
selectedUserName = userNames[indexPathRow]
self.performSegue(withIdentifier: "UsersToDetail", sender: self)

您可以从上面提到的链接下载完整的代码。如果发生任何问题，请在评论中告诉我

此链接也会有所帮助 [UITapGestureRecognizer tag]: unrecognized selector sent to instance

Answer 4

1：在cellForRowAtIndexpath方法中设置ImageView的标签，标签将等于indexPath.row

  int dynamicHeight = 0;
        int padding = 10;

        for (int i = 0; i <= dt.Columns.Count - 1; i++)
        {

            foreach (DataColumn column in dt.Columns)
            {
                    CheckBox[] chk = new CheckBox[dt.Columns.Count];
                    chk[i] = new CheckBox();
                    chk[i].Name = column.ColumnName;
                    chk[i].Text = column.ColumnName;
                    chk[i].AutoCheck = true;
                    chk[i].Bounds = new Rectangle(10, 20 + padding + dynamicHeight, 40, 22);
                    panelCol.Controls.Add(chk[i]);
                    dynamicHeight += 20;
                    panelCol.Size = new Size(120, dynamicHeight);
                    panelCol.Controls.Add(chk[i]);
                    chk[i].Location = new Point(0, dynamicHeight);
                    chk[i].Size = new Size(120, 21);
                    panelCol.BackColor = Color.White;
                    panelCol.AutoScroll = true;
                    //panelCol.AutoScrollMinSize = new Size (0, 1200);
            }
        }

2：将目标添加到imageView

上附带的tapGuestureRecognizer

3：在该方法中获取imageView的标签

imgView.tag = indexPath.row

4：相应地获取数据，然后按

let imgView = sender as! UIImageView
let tag = imgView.tag

Answer 5

有多种方法可以实现这一点，但最简单的方法是在UIImageView上方添加UIButton。并根据UITableViewCell的IndexPath设置UIButton的标记，并添加UIButton的click事件。

cell.btnImage.tag = indexPath.row

当用户尝试单击UIImage时，将单击图像上方的UIButton并触发按钮的单击事件，在这里您可以获得与该特定单元格中的UIImageView相同的UIButton tapped的索引

@IBAction func BtnClick(_ sender : UIButton) {

     print(sender.tag)//here you will get the IndexPath for that particular UIImageView in Cell.

}

当单元格内的图像被点击时如何获取indexPath

5 个答案: