Re: NSPredicate predicateWithFormat:
Re: NSPredicate predicateWithFormat:
- Subject: Re: NSPredicate predicateWithFormat:
- From: Keary Suska <email@hidden>
- Date: Thu, 23 Oct 2008 12:03:29 -0600
On Oct 23, 2008, at 11:05 AM, chaitanya pandit wrote:
NSArray *namesArray = [NSArray arrayWithObjects:@"Tom" , @"Matt" ,
@"Joe", nil];
NSPredicate *predicate = [NSPredicate predicateWithFormat: @"Name
IN %@", namesArray];
NSMutableArray *foundNames = [[arrayController
arrangedObjects]filteredArrayUsingPredicate:predicate];
It works but he problem is that i have a memory leak over here,
before creating the predicate, the retain count of namesArray is 1,
but after i create the predicate it is 2 and in instruments i see a
memory leak with the namesArray.
There is no memory leak in the code you provided. Everything is
autoreleased, and should be deallocated when the pool is drained. The
NSPredicate is probably retaining its arguments, and it should release
them when itself is released.
To check this, use alloc/init for the predicate and explicitly release
it before re-checking the retain count.
Anyway, you shouldn't rely on retain count for memory-related issues,
as you now see.
HTH,
Keary Suska
Esoteritech, Inc.
"Demystifying technology for your home or business"
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