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    <p>(Assuming deep copy is what you want) for the copy we want to make, use copyWithZone: for object instance variables and simply set primitive instance variables using =.</p> <pre><code>- (id)copyWithZone:(NSZone *)zone { MyClass *copy = [[MyClass alloc] init]; // deep copying object properties copy.objectPropertyOne = [[self.objectPropertyOne copyWithZone:zone] autorelease]; copy.objectPropertyTwo = [[self.objectPropertyTwo copyWithZone:zone] autorelease]; ... copy.objectPropertyLast = [[self.objectPropertyLast copyWithZone:zone] autorelease]; // deep copying primitive properties copy.primitivePropertyOne = self.primitivePropertyOne copy.primitivePropertyTwo = self.primitivePropertyTwo ... copy.primitivePropertyLast = self.primitivePropertyLast // deep copying object properties that are of type MyClass copy.myClassPropertyOne = self.myClassPropertyOne copy.myClassPropertyTwo = self.myClassPropertyTwo ... copy.myClassPropertyLast = self.myClassPropertyLast return copy; } </code></pre> <p>But notice how properties of the same class as self and copy must be set without copyWithZone:. Otherwise, these objects will call this copyWithZone again, and will try to set their myClassProperties using copyWithZone as well. This triggers an unwanted infinite loop. (Also, you could call allocWithZone: instead of alloc: but I'm pretty sure alloc: calls allocWithZone: anyway)</p> <p>There are some cases where using = to deep copy object properties of the same class might not be the thing you want to do, but in ALL CASES (as far as I'm aware) deepcopying object properties of the same class with copyWithZone: or anything that calls copyWithZone: will result in an infinite loop.</p>
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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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