Master data does not store data in essence for the first time

Question

I am developing an application using basic data in ios. And there are a lot of objects, and a lot of data needs to be saved, which is why I am storing the data in the return stream using the “private context” approach and using blocks. Everything is fine with all objects except one.

In this object, data is not saved the first time the application is launched and the data is synchronized, but after that, if I synchronize the data, all data in this object will be saved. Here is my code for saving data:

let programAttendeeAssignArray:NSArray? = dict["data_assign"] as AnyObject? as? NSArray for var paAssignIndex = 0; paAssignIndex < programAttendeeAssignArray?.count; paAssignIndex++ { let programAttendeeAssignObj:NSDictionary? = programAttendeeAssignArray?.objectAtIndex(paAssignIndex) as AnyObject? as? NSDictionary if let paAssignDict = programAttendeeAssignObj as? [String: AnyObject] { var keyString: String = "" if let eID = paAssignDict["id"]! as? Int { keyString = String(eID) } let paAssign: Conf_speakers = Utilities.sharedInstance.getOrCreateObjectOfEntityName("Conf_speakers", key: "id", identifier: keyString, localContext: privateContext) as! Conf_speakers if let eeid = paAssignDict["id"]! as? Int { paAssign.id = String(eeid) } if let attendee_id = paAssignDict["id1"]! as? Int { paAssign.attendee_id = String(attendee_id) } if let agenda_id = paAssignDict["id2"]! as? Int { paAssign.agenda_id = String(agenda_id) } if let updated_at = paAssignDict["id3"]! as? String { paAssign.updated_at = updated_at } } } let error: NSErrorPointer = nil do { try privateContext.save() } catch let error1 as NSError { error.memory = error1 } catch { fatalError() } dispatch_async(dispatch_get_main_queue(), { appDelegate.managedObjectContext.performBlock { () -> Void in //var fds:Bool do { try print("Result MSG: \(appDelegate.managedObjectContext.save())") // fds = true } catch _ { //fds = false } } }) 

Answer 1

  let appDel : AppDelegate = UIApplication.sharedApplication().delegate as! AppDelegate let context : NSManagedObjectContext = appDel.managedObjectContext let request = NSFetchRequest(entityName: "TableName") request.returnsObjectsAsFaults = false do { var results :NSArray try results = context.executeFetchRequest(request) if results.count == 0 { } else{ let managedObject = results[0] managedObject.setValue(text, forKey: "TableEntity") //save data into table try context.save() } } catch{}