On 5 Nov 2008, at 5:28 am, Amy Gibbs wrote:
I can connect it in IB, my problem is how to reference it / use the
objects in it in the code. In IB I already have the Array Controller
called Purchase Order Items.
If you have an IBOutlet, let's call it 'myPurchaseOrderItems', you can
see and connect it in IB, and simply refer to it in the code:
[myPurchaseOrderItems doStuff];
Note that the identifier 'Purchase Order Items' is illegal - you can't
have spaces in the identifier. Thus I wonder if you've run into a
common misconception which is that the name you assign an object in IB
has some relevance? It doesn't - it's just a label, inaccessible to
your code. Instead, you declare the IBOutlets in your code just as a
normal instance variable, but prefixed by 'IBOutlet':
@interface MyClass : NSObject
{
IBOutlet NSArrayController* myPurchaseOrderItems;
}
@end
Now if you drag a plain 'Object' into your IB window, set its class to
'MyClass', you'll see that it now has an outlet 'myPurchaseOrderItems'
available for connection. You can ctrl-drag that to the object it
represents. The icon label doesn't matter, it's just there to tell
stuff apart (which is useful when you have a number of otherwise
identical-looking icons in there) but of no use at runtime.
There's no real magic about IBOutlet, it's just a macro that stands
for nothing, but in IB that is detected and made available to the UI
within IB.
hth,
Graham
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