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    <p>You need to analyse this in light of Apple's <a href="http://developer.apple.com/library/mac/#documentation/cocoa/Conceptual/MemoryMgmt/Articles/mmRules.html" rel="nofollow">Memory Management Rules</a>.</p> <p>Starting with this line:</p> <pre><code>self.mutableDictionary = [self.immutableDictionary mutableDeepCopy]; </code></pre> <p>I would expect mutableDeepCopy to return an object I own, so at some point I need to release or autorelease it. e.g.</p> <pre><code>NSMutableDeepCopy* temp = [self.immutableDictionary mutableDeepCopy]; self.mutableDictionary = temp; [temp release]; </code></pre> <p>or</p> <pre><code>self.mutableDictionary = [[self.immutableDictionary mutableDeepCopy] autorelease]; </code></pre> <p>So now we need to look at mutableDeepCopy. Because it has 'copy' in the name it needs to returned an "owned" object which, in practice means "forgetting" to release the returned object. You have already failed to do that when you create the returned object in the first line, since dictionaryWithCapacity: gives you an object you do not own. Replace it with </p> <pre><code>NSMutableDictionary *dictionaryToReturn = [[NSMutableDictionary alloc] initWithCapacity:[self count]]; </code></pre> <p>Now you own it.</p> <p>It is important that you make your mutableDeepCopy obey the rules because it means you can treat the objects returned from mutableDeepCopy, mutableCopy and copy in exactly the same way. In all three cases you own the object copy that you insert into the array. Because you own it, you must release it or it'll leak as you found out. So, at the end of the loop, you need</p> <pre><code>[copy release]; </code></pre> <p>That'll stop the leak.</p>
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    1. COGreat explanation Jeremy. It helped me a lot.
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    2. CO@aahrens: no problem
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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