Re: NSString initWithFormat and stringWith
Re: NSString initWithFormat and stringWith
- Subject: Re: NSString initWithFormat and stringWith
- From: Graham Cox <email@hidden>
- Date: Thu, 28 May 2009 00:33:26 +1000
On 27/05/2009, at 11:59 PM, Ignacio Enriquez wrote:
I have a basic question regarding Class methods and instance methods
and memory allocation. (this is in iPhone OS 3.0 beta 5)
1.- What is the difference between string1 and string2? where
NSString *string1 = [NSString stringWithFormat:@"myFirstString"];
NSString *string2 = [[NSString alloc]
initWithFormat:@"mySecondString"];
I thought that string1's memory allocation and release would be done
by the system (autoreleased) and string2's memory and release should
be done by me (by [string2 release])
Am i mistaking?
No, you are correct.
A funny thing is when doing:
NSLog(@"retainCount %i %i", [string1 retainCoung], [string2
retainCount]);
I got :
"retainCount 2147483647 2147483647"
So It seems that both objects are autorelease objects... Why is that?
I thougth that string2 retainCount would be 1.
2.- How can I get two simple NSString instances with a retainCount
equal to 1
Forget retain counts. They are unintuitive and highly misleading. You
can never know what a retain count can be expected to be. Just follow
the rules and all will be well.
--Graham
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