CODEWITHSUNDEEP
core-dataautomatic-ref-counting
theiOSguy
theiOSguy

Reputation: 608

CoreData model objects in ARC uses retain

When I create the model objects for my entity in CoreData in ARC mode, it generates retain instead or strong. So does retain work and compiles in ARC mode also? I thought in ARC mode we cannot use release, autorelease and retain keywords?

Upvotes: 10

Views: 2337

Answers (2)

Daniel
Daniel

Reputation: 23359

Please check out this answer: https://stackoverflow.com/a/10036821/662605

The gist of it is that if you @synthesize your properties, then the code generated under the hood will rely on the retain type (retain, assign, copy).

Generated Managed Object subclasses use @dynamic not @synthesize, all this stuff is happening magically for you, so actually, although it's confusing, the retain keyword isn't being used it would seem, therefore the ARC isn't complaining... I'm pretty sure that's it.

Although I did try to swap the implementation to use @synthesize and still didn't get errors, but I think we could be onto something with that answer on the link

Any other insights would be nice.

Upvotes: 4

rob mayoff
rob mayoff

Reputation: 385500

Do you mean that it generates a @property declaration like this?

@property (nonatomic, retain) MyObject *object;

The retain property attribute means strong under ARC.

4.1.1. Property declarations

Upvotes: 4

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