CODEWITHSUNDEEP
cocoa
malik
malik

Reputation: 95

does copyWithZone on an NSArray call copyWithZone on its elements too?

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.

Upvotes: 3

Views: 707

Answers (1)

Ole Begemann
Ole Begemann

Reputation: 135550

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.

Upvotes: 5

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