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Asked: 2026-05-14T14:33:19+00:00

here’s the scenario, I have this array of Person objects. copyWithZone is implemented on

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here’s the scenario, I have this array of Person objects. copyWithZone is implemented on Person and works as expected.

I have an array of Person objects, however when I create a copy of the array and modify things in original array (change attributes of a Person) it changes the copy as well. So my best guess is that when I call copyWithZone on NSArray, it does not call it on its elements. Please confirm.

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1 Answer

  1. Editorial Team

    Confirmed. Cocoa’s collection classes implement NSCopying by creating a shallow copy. If you need a deep copy, you will have to implement it yourself.

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