ios - 如何从同一个类中的 prepareForSegue 方法访问覆盖 func tableView 属性

Question

我有两个 viewController。第一个是 tableViewController，第二个是 webViewController。我想使用 segue 将数据从第一个 vc 传递到第二个 vc。出于这个原因，我希望“chosenCellIndex”的值从覆盖 func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) 到 prepareForSegue 方法。但是我无法从 prepareForSegue 方法访问 chosenCellIndex 值。请帮忙。

类 NewsTableViewController: UITableViewController {

@IBOutlet var Alphacell: UITableView!

var chosenCellIndex = 0
//var temp = 0
var newspaper = ["A","B","C"]


override func viewDidLoad() {
    super.viewDidLoad()

}
override func numberOfSectionsInTableView(tableView: UITableView) -> Int {
    return 1
}

override func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
    return newspaper.count
}


override func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
    let cell = tableView.dequeueReusableCellWithIdentifier("Alphacell", forIndexPath: indexPath) as UITableViewCell

    cell.textLabel?.text = newspaper[indexPath.row]

   // Alphacell.tag = indexPath.row
    //Alphacell.addTarget(self, action: "buttonClicked:",forControlEvents: UIControlEvents.TouchUpInside)

    return cell
}

override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

    chosenCellIndex = indexPath.row
    //println(chosenCellIndex)

    // Start segue with index of cell clicked
    //self.performSegueWithIdentifier("Alphacell", sender: self)

}


override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {

    let secondViewController = segue.destinationViewController as WebViewController
    secondViewController.receivedCellIndex = chosenCellIndex
    println(chosenCellIndex)
}

Answer 1

为了获取选定的单元格索引，您需要获取所选行的索引路径，然后您需要从索引路径获取节或行索引。

获取行索引见下面的代码

    let indexPath = tableName.indexPathForSelectedRow
    let section = indexPath?.section
    let row = indexPath?.row