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POObjective-C: alloc of object within init of another object (memory management)
 

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    <p>In my <code>.h file</code> I have:</p> <pre><code>NSMutableArray *myArray; @property (nonatomic, retain) NSMutableArray *myArray; </code></pre> <p>My <code>.m file</code> looks basically like this:</p> <pre><code>@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]; } </code></pre> <p>What I'm not sure about is what do to in the <code>init</code>.</p> <p>1)</p> <pre><code>self.myArray = [[NSMutableArray alloc] init]; </code></pre> <p>2) </p> <pre><code>NSMutableArray *tmp = [[NSMutableArray alloc] init]; self.myArray = tmp; [tmp release]; </code></pre> <p>Solution 1 doesn't seem right to me, because of my <code>@property (retain)</code> setting I automatically increase the retain counter when setting self.myArray, but additionally I have already a "+1 retain" due to the <code>[NSMutableArray alloc]</code> and then ending up with a retain count of 2 for that object, but only releasing once in the <code>dealloc</code>. Thus the second solution seems more correct to me, even though it is cumbersome.</p> <p>Also am I wondering if <code>self.myArray = ...</code> is actually the same as <code>[self setMyArray:...]</code> and thus does increase the retain count.</p> <p><strong>UPDATE</strong></p> <p>I actually found the answers (and even more details) <a href="http://www.iphonedevsdk.com/forum/iphone-sdk-tutorials/7295-getters-setters-properties-newbie.html" rel="nofollow noreferrer">here</a> in case anyone is interested in reading more.</p>
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