Question

i have a property

//.h
@property (nonatomic, retain) SomeCLass * someSynthInstance;
//.m
@synthesize someSynthInstance = _someSynthInstance;

- (void) foo 
{
    self.someSynthInstance = [[SomeCLass alloc] init];
    //[self.someSynthInstance release]; <- SHOULD I RELEASE HERE???
}

- (void) dealloc 
{
    self.someSynthInstance = nil;
}

my theory goes, that [alloc, init] creates a count of 1, and the setter, inc that count, so it becomes 2, therefore i should release it, right after

but aim getting exc_bad_access in the application after i changed everything like this, so aim not sure if its ok

Answer 1

you want to be releasing the instance variable rather than the property. so you can do either:

self.someSynthInstance = [[[SomeCLass alloc] init] autorelease]; // puts it in the autoreleasepool so it'll get released automatically at some point in the near future

or

_someSynthInstance = [[SomeCLass alloc] init]; // skip the property

or

self.someSynthInstance = [[SomeCLass alloc] init];
[_someSynthInstance release]; // call release on the instance variable