Objective-C: alloc of object within init of another object (memory management)
- by Stefan Klumpp
In my .h file I have:
NSMutableArray *myArray;
@property (nonatomic, retain) NSMutableArray *myArray;
My .m file looks basically like this:
@synthesize myArray;
- (id) init {
self = [super init];
if (self != nil)
{
self.myArray = .... ? // here I want to create an empty array
}
return self;
}
- (void) dealloc {
[self.myArray release];
[super dealloc];
}
What I'm not sure about is what do to in the init.
1)
self.myArray = [[NSMutableArray alloc] init];
2)
NSMutableArray *tmp = [[NSMutableArray alloc] init];
self.myArray = tmp;
[tmp release];
Solution 1 doesn't seem right to me, because of my @property (retain) setting I automatically increase the retain counter when setting self.myArray, but additionally I have already a "+1 retain" due to the [NSMutableArray alloc]. Thus the second solution seems more correct to me, even though it is cumbersome.
Also am I wondering if self.myArray = ... is actually the same as [self setMyArray:...] and thus does increase the retain count.
