无法投类型TableViewCell的价值 'NSIndexPath'

无法投型 'Google_Books_1.BookTableViewCell' 的值（0x105557600）为 'NSIndexPath'（0x1061cb438）无法投类型TableViewCell的价值 'NSIndexPath'

func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell { 
     let cell = tableView.dequeueReusableCellWithIdentifier("BookCell", forIndexPath: indexPath) as!BookTableViewCell 
    ... 
} 


func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) { 
     // let contact = ContactList![indexPath.row] 
     performSegueWithIdentifier("BookDetailSegue", sender: indexPath) 
    } 
func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) { 
     // let contact = ContactList![indexPath.row] 
     performSegueWithIdentifier("BookDetailSegue", sender: indexPath) 
    } 

    override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
     if segue.identifier == "BookDetailSegue" { 
      let vc = segue.destinationViewController as! BookDetailViewController 

      let indexPath = sender as! NSIndexPath 
      vc.book = self.bookList[indexPath.row] **//error is here** 
      vc.index = indexPath.row 
     } 
    }

如何处理这样的错误？

来源

2016-06-12 Beibut

你确实知道你正在使用2个didDeselectRowAtIndexPath函数吗？你不是故意使用didSelectRowAtIndexPath吗？ – Devster101

声明变量的实例

var indexPath: NSIndexPath?

然后将所选indexPath像波纹管：

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) { 
      // let contact = ContactList![indexPath.row] 
      self.indexPath = indexPath 
      performSegueWithIdentifier("BookDetailSegue", sender: indexPath) 
     }

现在访问indexPath这样的：

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
      if segue.identifier == "BookDetailSegue" { 
       let vc = segue.destinationViewController as! BookDetailViewController 

       vc.book = self.bookList[self.indexPath.row!] **//error is here** 
       vc.index = indexPath.row 
      } 
     }

希望这有助于你。

来源

2016-06-12 09:51:02 iMuzahid

它不起作用。我猜它不进入功能tableView（tableView：UITableView，didDeselectRowAtIndexPath indexPath：NSIndexPath）方法 – Beibut

嗨，检查我编辑的答案，并删除方法didDeSelect，并确保prepareForSegue方法被调用。 – iMuzahid

为什么不把自己放在你的tableView的indexPathForSelectedRow属性上呢？

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
    if segue.identifier == "BookDetailSegue" { 
     let vc = segue.destinationViewController as! BookDetailViewController 
     if let indexPath = tableView.indexPathForSelectedRow { 
      vc.book = self.bookList[indexPath.row] **//error is here** 
      vc.index = indexPath.row 
     } 
    } 
}

来源

2016-06-12 09:53:21

它的工作原理。非常感谢你。 – Beibut

无法投类型TableViewCell的价值 'NSIndexPath'

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