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Editorial Team
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Asked: 2026-06-12T03:32:14+00:00

NSFetchRequest has methods predicate and setPredicate . I wonder why Apple not make predicate

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NSFetchRequest has methods predicate and setPredicate. I wonder why Apple not make predicate a property of NSFetchRequest? That would make life a little bit easier.

More, it appears that NSFetchRequest has no properties at all.. What’s the underlying principle behind this?

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1 Answer

  1. Editorial Team

    There’s one very good reason it has no properties:

    • NSFetchRequest was introduced with Core Data in Mac OS X 10.4.
    • Properties were introduced with Objective-C 2.0 in Mac OS X
      10.5.

    So the class predates the invention of Objective-C properties, and for whatever reason has never been revisited.

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