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Editorial Team
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Asked: 2026-06-07T13:08:43+00:00

Say I wanna create an array of images and i used this: NSMutableArray *images

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Say I wanna create an array of images and i used this:

NSMutableArray *images = [[NSMutableArray alloc]init];

what role does init really play here? won’t it work if I simply use:

NSMutableArray *images = [NSMutableArray alloc];

Please help. Thanks.

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1 Answer

  1. Editorial Team

    No, you absolutely cannot just say [NSMutableArray alloc]. Calling a method on the results of sending +alloc to any class is absolutely incorrect unless that method is one of the -init... methods. All +alloc does is reserve the memory for the object. It’s basically equivalent to calling calloc(sizeof(class), 1). The -init method is crucial to actually initialize the object into a working state.

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