Re: simple question about passing around pointers to objects
Re: simple question about passing around pointers to objects
- Subject: Re: simple question about passing around pointers to objects
- From: "Clark Cox" <email@hidden>
- Date: Fri, 27 Jun 2008 17:59:47 -0700
On Fri, Jun 27, 2008 at 5:19 PM, Daniel Richman
<email@hidden> wrote:
>
>> Here is a simple example:
>>
>> -(NSArray*) makeObject {
>> NSArray *a = [NSArray arrayFromObjects];someObject, anotherObject,
>> nil];
>
> This should be NSArray *a = [NSArray arrayFromObjects:someObject,
> anotherObject];
Almost. It should be:
NSArray *a = [NSArray arrayFromObjects:someObject, anotherObject, nil];
(that nil is important)
>>
>> // should I [a retain];
>
> I would use [a retain];
If you retain "a", then you're setting yourself up for a memory leak.
Please read the memory management documentation:
<http://developer.apple.com/documentation/Cocoa/Conceptual/MemoryMgmt/index.html>
--
Clark S. Cox III
email@hidden
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