UITableView不使用单元格作为发件人

Question

我正在尝试segue并传递数据（从UITableView到UIViewController）。我的代码是

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "IndividualAchievementsSegue" {
         let destination = segue.destinationViewController as? IndividualAchievementsViewController
        let cell = sender as! UITableViewCell
        let selectedRow = AchievementsTable.indexPathForCell(cell)!.row
         destination!.viaSegue = achievements[selectedRow]
        print(selectedRow)
    }
}

但该行让cell = sender为！ UITableViewCell正在抛出

  

无法将'ProgramName.AchievementsViewController'类型的值转换为'UITableViewCell'

我也试过

  override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "IndividualAchievementsSegue" {
         let destination = segue.destinationViewController as? IndividualAchievementsViewController
         let selectedRow = AchievementsTable.indexPathForSelectedRow!.row
         destination!.viaSegue = achievements[selectedRow]
        print(selectedRow)
    }
}

失败是因为它在achievements[selectedRow]期间发现nil解包可选项，因为这显然给了let selectedRow = AchievementsTable.indexPathForSelectedRow!.row

的nil

Answer 1

我认为问题在于您的segue与AchievementsViewController到IndividualAchievementsViewController而不是UITableViewCell与IndividualAchievementsViewController相关联。检查故事板，并使用TableCell到IndividualAchievementsViewController更正segue。

Answer 2

所以解决方案是进入DidSelectrowAtIndexPath并删除DeselectRowAtIndexPath，它在那里偶然发生了两次。然后使用以下

 override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
    if segue.identifier == "IndividualAchievementsSegue" {
        let destination = segue.destinationViewController as? IndividualAchievementsViewController
        let selectedRow = AchievementsTable.indexPathForSelectedRow?.row
        destination!.viaSegue = achievements[selectedRow!]
        print(selectedRow)
    }
}