VC之间的快速传递数据

Question

我是新来的Swift，我想知道为什么我从Obj-C翻译的这段代码在这里不起作用。

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
     if segue.identifier == "scoreDetail" { 
      let indexPath = self.tableView.indexPathForSelectedRow() 
      let object = self.fetchedResultsController.objectAtIndexPath(indexPath) as NSManagedObject 

      let itemVC: ScoreVC = segue.destinationViewController as ScoreVC 
      itemVC.detailItem = object 
     } 
    } 

这是故事板。我一旦有从细胞Show Replace SEGUE到UINavigatorController

我得到这个错误，因为我在UITableViewCell

Answer 1

问题点击无关斯威夫特用。 destinationViewController是导航控制器，而不是您的ScoreVC，所以您翻译的代码不应该有效（如果它具有相同的设置）。它应该看起来像这样，

override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) { 
     if segue.identifier == "scoreDetail" { 
      let indexPath = self.tableView.indexPathForSelectedRow() 
      let object = self.fetchedResultsController.objectAtIndexPath(indexPath) as NSManagedObject 

      let nav : UINavigationController = segue.destinationViewController 
      let itemVC: ScoreVC = nav.topViewController as ScoreVC 
      itemVC.detailItem = object 
     } 
    }