#core-data

Fix: Delete/Reset all entries in Core Data? #answer #programming #fix

Delete/Reset all entries in Core Data?

Do you know of any way to delete all of the entries stored in Core Data? My schema should stay the same; I just want to reset it to blank.

Edit

I’m looking to do this programmatically so that a user can essentially hit a reset button.

Answer [by Hunter]: Delete/Reset all entries in Core Data?

Delete the persistent store file and setup a new persistent store…

Answer: Xcode 4, Core Data Model Version – Set Current Version #dev #it #fix

Xcode 4, Core Data Model Version – Set Current Version

I’m confused about how to perform the following function in Xcode 4 to set the model to use after creating a versioned model.

Design > Data Model > Set Current Version

Answer [by Ben]: Xcode 4, Core Data Model Version – Set Current Version

Click on the top level .xcdatamodelId file (the one that has the many versions of .xcdatamodel under it…

Solution: Core Data: Quickest way to delete all instances of an entity #dev #answer #programming

Core Data: Quickest way to delete all instances of an entity

I’m using Core Data to locally persist results from a Web Services call. The web service returns the full object model for, let’s say, “Cars” – could be about 2000 of them (and I can’t make the Web Service return anything less than 1 or ALL cars.

The next time I open my application, I want to refresh the Core Data persisted copy by…

Resolved: Best way to implement Enums with Core Data #development #fix #computers

Best way to implement Enums with Core Data

What is the best way to bind Core Data entities to enum values so that I am able to assign a type property to the entity? In other words, I have an entity called Item with an itemType property that I want to be bound to an enum, what is the best way of going about this.

Answer [by iKenndac]: Best way to implement Enums with Core Data

You’d have to…

How to: How to delete an old/unused Data Model Version in xCode 4

How to delete an old/unused Data Model Version in xCode 4

How can I delete an old Data Model in xCode 4? The option is disabled on the menu. (The models I want to delete have not been released to the public – they are interim development models.)

Answer: How to delete an old/unused Data Model Version in xCode 4

I’ve just found the need to do this. I created a new model version then realised I…

How to: Adding Core Data to existing iPhone project

Adding Core Data to existing iPhone project

I’d like to add core data to an existing iPhone project, but I still get a lot of compile errors:

- NSManagedObjectContext undeclared - Expected specifier-qualifier-list before 'NSManagedObjectModel' - ...

I already added the Core Data Framework to the target (right click on my project under “Targets”, “Add” – “Existing Frameworks”,…

How to: What do I have to do to get Core Data to automatically migrate models?

What do I have to do to get Core Data to automatically migrate models?

I have read in the documentation about automatic /lightweight migration for Core Data models – but am having problems in the reality of implementing it.

As I understand it the application should notice that the model it has and the model that exists on a device already are not the same. If you have only added attributes or…

Fixed How to Sync iPhone Core Data with web server, and then push to other devices? #dev #it #asnwer

How to Sync iPhone Core Data with web server, and then push to other devices?

I have been working on a method to sync core data stored in an iPhone application between multiple devices, such as an iPad or a Mac. There are not many (if any at all) sync frameworks for use with Core Data on iOS. However, I have been thinking about the following concept:

A change is made to the local core data…