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Re: How to NSTableView and NSArrayConroller


On Dec 27, 2006, at 9:47 PM, Craig Laird wrote:

I am hoping that someone can help me with this, as a newbie to Cocoa please be nice :)
[...]
@implementation MyController
- (void)awakeFromNib
{

    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    ABAddressBook *book = [ABAddressBook sharedAddressBook];
	contact = [book people];
	NSLog( [contact description] );

    [pool release];
    return 0;
}
@end


You don't need a lot of this. Use this instead:

@implementation MyController
- (void)awakeFromNib
{
	ABAddressBook *book = [ABAddressBook sharedAddressBook];
	contact = [[NSMutableArray alloc] initWithArray:[book people]];
	NSLog( [contact description] );
}
@end

See below for an explanation.


So what else do I need to do ??
My objective is to list all the contacts in the Address Book and then sort the alphabetically

The issue is essentially that you need to make sure the array stays around by doing something like this:

	contact = [[NSMutableArray alloc] initWithArray:[book people]];

If you don't do this, the array will likely go away and the app will crash (or at least not work correctly). You also have to make sure you do [contact release] in MyController's -dealloc method. Make one if it doesn't exist:

- (void) dealloc
{
	[contact release];
	[super dealloc];
}

Do your best to read up on Objective-C memory management so understand what's going on.

The other thing is that I don't think ABPerson implements a method called -name (though I could be wrong), so this might not work at all. If it doesn't, you'll probably have to create your own class which *does* have a -name method and gets its name data from an ABPerson instance.

To do that, you'd use ABRecord's -valueForProperty: method with kABFirstNameProperty and kABLastNameProperty.

That might be sort of confusing if you're a newbie but this isn't completely simple stuff. Trying to explain it all in a single email would take quite a bit of time. Hopefully you have enough to get started.

Hope that helps,

     - Scott

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References: 
 >How to NSTableView and NSArrayConroller (From: Craig Laird <email@hidden>)



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