nsmanagedobject

I just simply created a demo project with Core Data. I created an entity Userinfo in my data model. Now I created a NSManagedObject subclass of this entity. Xcode autogenerated these 4 classes. Now when I build the project it throws this error: I have done everything I know to remove the error of duplicacy but nothing helped. I think its a Xcode bug. Please help. shallowThought You are generating files which have already been generated for you by Xcode and thus get duplicate declarations. Details about this feature (new in Xcode 8) can be found in this WWDC video . Two possible fixes: 1) Use

I'm trying to set up a relationship in Core Data. I have a list of Trees, and each Tree will have a list of Fruits. So I have a Tree entity and a Fruit entity. In code, I will want to list the Trees, in a table view for example. When you click on a Tree, it should then display a list of fruits that growing on that Tree. How do I set up this relationship? Do I need to give the Fruit an attribute called tree? And how do I set the relationship in code, for example when I create a Fruit how do I associate it with a given Tree ? Soleil, This is quite simple. First of of all, your model should look

I have a coredata entity named Record and has a property dateUpdated. I noticed that the generated NSManagedObject subclass has no optional mark (?) CoreData Editor: Generated Subclass: Expected: UPDATED: It's tedious in my part, because each time I want to regenerate the subclasses, it means I also need to update all optional values manually. Having a non-optional (without '?') in subclass lead me to check evalue before assigning, like example below: // sample value: // serverDateFormatter = "yyyy/MM/dd" // dateString = "" // Branch is a subclass of Record (see above images) var date = self

I have what I assume is a fairly standard setup, with one scratchpad MOC which is never saved (containing a bunch of objects downloaded from the web) and another permanent MOC which persists objects. When the user selects an object from scratchMOC to add to her library, I want to either 1) remove the object from scratchMOC and insert into permanentMOC, or 2) copy the object into permanentMOC. The Core Data FAQ says I can copy an object like this: NSManagedObjectID *objectID = [managedObject objectID]; NSManagedObject *copy = [context2 objectWithID:objectID]; (In this case, context2 would be

The following method gets called in order to populate my Core-Data after AFNetworking fetches information from my app server. The information seems to be perfectly working as when the table is updated I can see the new information being updated in the UITableView . Now the problem that I have is that even tho I can see the information ( after it has been fetches from the server, stored into Core-data and refetches to display in my UITableView ) If I then go and close my app and re open it, the information is not there anymore. It seems as if the information is not persistent and the problem