swift - 试图找出一种使用单个 UITableview 的不那么笨拙的方法

Question

我有一个 UITableViewController 连接到一个 UIViewController。我制作了一个全局 counter 来跟踪 UITableView 中的哪一行被选中。因为根据选择的行，呈现的 UIViewController 中的一些信息会发生变化。

我认为可以对其进行整理，这样 dayx segue 只需调用一次并且 counter 可以根据选择的行相应地更改？但我无法弄明白。

这就是我目前拥有的，它可以工作但看起来很乱？:

//what happens when row is selected
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
    if indexPath.row == 0 {
        counter = 0
        self.performSegue(withIdentifier: "dayx", sender: self)
    } else if indexPath.row == 1 {
        counter = 1
        self.performSegue(withIdentifier: "dayx", sender: self)
    }
    else if indexPath.row == 2 {
        counter = 2
        self.performSegue(withIdentifier: "dayx", sender: self)
    }
    else if indexPath.row == 3 {
        counter = 3
        self.performSegue(withIdentifier: "dayx", sender: self)
    }
    else if indexPath.row == 4 {
        counter = 4
        self.performSegue(withIdentifier: "dayx", sender: self)
    }
    else if indexPath.row == 5 {
        counter = 5
        self.performSegue(withIdentifier: "dayx", sender: self)
    }
    else if indexPath.row == 6 {
        counter = 6
        self.performSegue(withIdentifier: "dayx", sender: self)
    }
}

Answer 1

使用flatMap:

swift 4.0

indexPath.flatMap {
    print($0) 
    counter = $0
    self.performSegue(withIdentifier: "dayx", sender: self)
}

后来:

let _ = indexPath.compactMap {
     counter = $0
     self.performSegue(withIdentifier: "dayx", sender: self)
 }

了解 flatMap 的基础知识。阅读本文 Replacing flatMap With compactMap

更新

如果您的所有行都旨在执行 performSegue。简单:

//what happens when row is selected
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {

   counter = indexPath.row
   self.performSegue(withIdentifier: "dayx", sender: self)
}