ios - 如何从 UITableView 中获取对象 ID 并根据对象 ID 删除对象？

Question

现在我遇到了这个问题，我不知道如何在用户从 UITableView 中选择对象 ID 并将其传递到另一个 View Controller 后，我想根据我已经获取的对象 ID 删除对象从上一个。所有数据均来自user实体。

UITableView

var myList: Array <AnyObject> = []

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

        let appDel: AppDelegate = (UIApplication.sharedApplication().delegate as AppDelegate)
        let context: NSManagedObjectContext = appDel.managedObjectContext!

        /* grab object id here from core data object and pass to NSUserDefault*/
        NSUserDefaults.standardUserDefaults().setObject(objectId, forKey: "userId")

        let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

        let deleteViewController = storyBoard.instantiateViewControllerWithIdentifier("accessView") as DeleteViewController
        self.presentViewController(deleteViewController, animated:true, completion:nil)

    }

删除 View Controller

 let objectId = NSUserDefaults.standardUserDefaults().stringForKey("userId")
/* Grab object id from NSUserDefault and delete object here*/

Answer 1

我已经找到了答案。

UITableView

var myList: Array <AnyObject> = []

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

        let data: NSManagedObject = myList[indexPath.row] as NSManagedObject

        let userId = data.valueForKeyPath("userId") as? String
        NSUserDefaults.standardUserDefaults().setObject(objectId, forKey: "userId")

        let storyBoard : UIStoryboard = UIStoryboard(name: "Main", bundle:nil)

        let deleteViewController = storyBoard.instantiateViewControllerWithIdentifier("accessView") as DeleteViewController
        self.presentViewController(deleteViewController, animated:true, completion:nil)

    }

删除 View Controller

let userId = NSUserDefaults.standardUserDefaults().stringForKey("userId")

                    //reference to our app delegate
                    let appDel: AppDelegate = (UIApplication.sharedApplication().delegate as AppDelegate)
                    let context: NSManagedObjectContext = appDel.managedObjectContext!

                    let request = NSFetchRequest(entityName: "EntityOne")
                    request.includesSubentities = false
                    request.returnsObjectsAsFaults = false
                    request.predicate = NSPredicate(format: "userId = %@", userId!)
                    let items = context.executeFetchRequest(request, error: nil)!

                    for item in items {
                        context.deleteObject(item as NSManagedObject)
                    }