如果单元格被触摸 - 在另一个 VC [SWIFT] 上移动

Question

如果单元格被触摸 - 移动到另一个VC，我该怎么做？ 我试图这样做，但我没有工作。 这是我的代码

override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "transData" {
let destination = segue.destination as! WinnerViewController
let cell = sender as? UITableViewCell
if cell == cell {
let indexPath = tableView.indexPath(for: cell!)
if indexPath == indexPath {
let productName = users[(indexPath?.row)!]
destination.winner = productName.name
}
}
}

当我触摸每个单元格时 - 它没有移动。 请帮忙

Answer 1

有两个选项可以在点击单元格时执行 segue。

1. Segue 从表视图单元格连接到目标控制器

   在这种情况下，单元格作为sender参数传递

   override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
   if segue.identifier == "transData", let cell = sender as? UITableViewCell {
   let destination = segue.destination as! WinnerViewController
   let indexPath = tableView.indexPath(for: cell)!  
   let productName = users[indexPath.row]
   destination.winner = productName.name
   }
   }
   

2. Segue 从源控制器连接到目标控制器

   在这种情况下，您必须实现didSelectRowAt，调用performSegue(withIdentifier并将索引路径作为参数传递sender

   func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
   performSegue(withIdentifier: "transData", sender: indexPath)
   }
   

   那么prepare(for必须是

   override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
   if segue.identifier == "transData", let indexPath = sender as? IndexPath {
   let destination = segue.destination as! WinnerViewController
   let productName = users[indexPath.row]
   destination.winner = productName.name
   }
   }
   

Answer 2

Hi you can do like this :
take Indexpath as golbal variable eg : var indexPathTemp : IndexPath?
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
indexPathTemp = indexPath
performSegueWithIdentifier("transData", sender: self)
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "transData" {
let destination = segue.destination as! WinnerViewController
let productName = users[(indexPath?.row)!]
destination.winner = productName.name
}
}

Answer 3

编辑

@vadian的答案是详细而正确的。以下是从一个视图控制器导航到另一个视图控制器的其他方法。

如果您使用segue，并且想要导航到WinnerViewController：

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
performSegue(withIdentifier: "YOUR_SEGUE_IDENTIFIER", sender: indexPath)            
}
override func prepare(for segue: UIStoryboardSegue, sender: Any?) {
if segue.identifier == "YOUR_SEGUE_IDENTIFIER", let indexPath = sender as? IndexPath {
let destinationVC = segue.destination as? WinnerViewController
let productName = users[indexPath.row]
destinationVC.winner = productName.name
}
}

如果您使用Storyboard和pushViewController：

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let productName = users[indexPath.row]
let storyboard = UIStoryboard(name: "Main", bundle: nil)
guard let destinationVC = storyboard.instantiateViewController(withIdentifier: "YOUR_WINNER_VIEW_IDENTIFIER") as? WinnerViewController else { return}
destinationVC.winner = productName.name
navigationController?.pushViewController(destinationVC, animated: true)
}

如果您使用Interface Builder和pushViewController：

func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
let productName = users[indexPath.row]    
let destinationVC = WinnerViewController(nibName: "YOUR_WINNER_VIEW_NAME", bundle: nil)
destinationVC.winner = productName.name
navigationController?.pushViewController(destinationVC, animated: true)
}