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Editorial Team
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Asked: 2026-05-25T09:30:42+00:00

I looked through a core data tutorial which puts the core data code in

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I looked through a core data tutorial which puts the core data code in the AppDelegate class that is created upon creating a Window project. I was able to successfully save and retrieve data from the premade AppDelegate class.

My question is, if i have a ViewController that saves data, how do i go about saving data from that specific class.

  • Do i need to redefine the persistent store and managedObjectModel in that class?
  • If that is the case, what is the programmatic way to do it (since previously it was generated for me) i.e what methods/instancevariables/properties do i need to declare.

Standing by for any clarifications there may be

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1 Answer

  1. Editorial Team

    No need to go through the app delegate or redefine persistent store etc. All you need is a reference to the managedObjectContext. Normally, this is a property (say, of a view controller) that you can set from the outside after creation and easily access from inside the view controller class (much easier than going through the app delegate!). You can pass this on easily to other view controllers, and read from and write to core data with the standard methods.

    If you want to save your own objects, yes – you have to create your own managed object model (by modifying the one the template generated for you).

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