Re: Object Ownership
Re: Object Ownership
- Subject: Re: Object Ownership
- From: Dave Carrigan <email@hidden>
- Date: Sat, 22 May 2010 10:13:55 -0700
On May 22, 2010, at 8:18 AM, Michael Jackson wrote:
> Hi all,
>
> First day with Cocoa, so please excuse the basic newbness of this
> question. ;) I've read through the documentation about object
> ownership and disposal and just wanted to make sure I'm doing
> everything correctly in the following method.
>
>
> - (NSURL *)makeURL:(NSString *)aURLString
> {
> NSMutableString *aCopy = [aURLString mutableCopy];
>
> // do some stuff with aCopy here
>
> NSURL *aURL = [NSURL URLWithString:aCopy];
> [aCopy release];
>
> return aURL;
> }
>
>
> The question is whether or not NSURL's URLWithString: is going to
> retain aCopy, so it's safe to be released on the next line. I'm just
> looking for some confirmation or any pointers from people who are more
> used to managing memory than I am.
This is fine. If NSURL needs to keep aCopy, it will retain it; if it doesn't, it will not. That's not your concern; only the implementor of NSURL needs to worry about that.
Your only concern is to release aCopy when you don't need it any more, which is what you are doing.
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