Re: Exiting cleanly the init method under ARC
Re: Exiting cleanly the init method under ARC
- Subject: Re: Exiting cleanly the init method under ARC
- From: Quincey Morris <email@hidden>
- Date: Wed, 27 Jun 2012 09:54:13 -0700
On Jun 27, 2012, at 09:12 , Tito Ciuro wrote:
> However, if something critical happens within the init method when ARC is activated, what would be the proper way to exit? Would it look like this?:
>
> - (id)init
> {
> self = [super init];
>
> if (self) {
> if (<somecondition != good>) {
> // Cleanup here if needed...
> return nil;
> }
> }
>
> return self;
> }
Yes, just return nil.
Like other local variables, 'self' will be released automatically (if non-nil) at exit from its scope, which is the entire method in this case. Because this is an 'init'-family method, the return value is retained (if non-nil) on execution of the 'return' statement.
If you put those 2 behaviors together, you'll see that your ARC code has the same memory management effect as your non-ARC code, no matter which 'return' statement is executed.
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