“Swift Core Data”和UISearchController

我有 tableView 与 NSFetchedResultsController ！我完全完成了 NSFetchedResultsController 的委托方法并且完美无缺！我的问题在于提交 UIAlertController . UIAlertController 在 tableView 上运行良好，但在 UISearchController 内部无效 . 我试图删除 UISearchController 内的对象 . 当我按下删除按钮Xcode给我这样的错误：

这是我的 commitEditingStyle 方法的代码和 UIAlertController ， UIAlertAction 的 handler ：

`//覆盖以支持编辑表格视图 . override func tableView（tableView：UITableView，commitEditingStyle editingStyle：UITableViewCellEditingStyle，forRowAtIndexPath indexPath：NSIndexPath）{if editingStyle == .Delete {

let itemToDelete:Manager = self.fetchedResultsController.objectAtIndexPath(indexPath) as! Manager
        prepareForDelete(itemToDelete)

        // Delete the row from the data source
        //tableView.deleteRowsAtIndexPaths([indexPath], withRowAnimation: .Fade)
    } else if editingStyle == .Insert {
        // Create a new instance of the appropriate class, insert it into the array, and add a new row to the table view
    }    
}

// Delete Action
var itemsToDelete:Manager!

// Delete function

private func prepareForDelete（managedObject：Manager）{

//
    self.itemsToDelete = managedObject

    // Alert
    let alert:UIAlertController = UIAlertController(title: "Warning!", message: "Do you want to delete this note?", preferredStyle: UIAlertControllerStyle.Alert)

    // Actions
    let deleteAction:UIAlertAction = UIAlertAction(title: "Delete", style: UIAlertActionStyle.Destructive, handler: deleteHandler)

    // Actions
    let cancelAction:UIAlertAction = UIAlertAction(title: "Cancel", style: UIAlertActionStyle.Cancel, handler: nil)

    // Add actions to the alert
    alert.addAction(deleteAction)
    alert.addAction(cancelAction)

    // Present alert
    self.presentViewController(alert, animated: true, completion: nil)
}

func deleteHandler(alert:UIAlertAction) -> Void {

    // Delete from the moc
    if let delete = self.itemsToDelete {
        self.managedObjectContext.deleteObject(delete)
        do {
            // Save changes
            try self.managedObjectContext.save()
        } catch {

        }
        self.itemsToDelete = nil
    }
}`

如何禁用 UIAlertController ？我不需要 UISearchController 内的警报 . 因为这个功能在 UISearchController 里面不起作用

感谢您的关注！