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    <p>You're trying to subclass NSMutableDictionary? There's a blog entry for that!</p> <p><a href="http://cocoawithlove.com/2008/12/ordereddictionary-subclassing-cocoa.html" rel="nofollow noreferrer">http://cocoawithlove.com/2008/12/ordereddictionary-subclassing-cocoa.html</a></p> <p>First bit of advice?</p> <blockquote> <p>Best practice: don't subclass</p> </blockquote> <p>He's right. Trying to subclass a class not designed to be subclassed in Cocoa is usually harder than you think it'll be, and 99% of the time isn't necessary anyway. </p> <hr> <p>Looking at the code you posted, it doesn't look like you need to subclass anyway. Create a class that implements the title and begins methods and use a dictionary to handle the underlying storage.</p> <p>edit2: Clarified my last statement about subclassing. Some classes in Cocoa are designed to be subclassed (UIViewController, NSObject) and do so willingly, others are not designed to be subclassed and require a lot of careful coding (and in some cases, inside knowledge of how the objects work) to get them to work correctly. Bottom line: unless you're subclassing one of the classes designed for it, be careful and consider other alternatives (<a href="http://en.wikipedia.org/wiki/Decorator_pattern" rel="nofollow noreferrer">decorator class</a>, <a href="http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/ObjectiveC//Articles/ocCategories.html#//apple_ref/doc/uid/TP30001163-CH20-SW1" rel="nofollow noreferrer">categories</a>, <a href="http://en.wikipedia.org/wiki/Delegation_pattern#Objective-C_example" rel="nofollow noreferrer">delegation</a>, <a href="http://doronkatz.com/objective-c-about-notifications" rel="nofollow noreferrer">notification</a>, etc.)</p>
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    1. POObjC: Alloc instance of Class and performing selectors on it leads to __CFRequireConcreteImplementation
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    1. COThank you! I was googling like hell before posing this question here but it's hard to find something when you're going at it the wrong way & using the wrong keywords...
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    2. COI only had to search my Google Reader content, so I got lucky. Good luck!
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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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