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Confused about bindings and NSTableView
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Confused about bindings and NSTableView


  • Subject: Confused about bindings and NSTableView
  • From: Juan Pablo Pertierra <email@hidden>
  • Date: Wed, 8 Dec 2004 11:30:41 -0500

So, i have a table view which is bound to an NSMutableArray. I have followed the same bindings used in:

http://developer.apple.com/samplecode/Fiendishthngs/Fiendishthngs.html

However in this example they access the array directly, and they seem to add objects to the table with [array addObject:object], which works when the application is compiled. When i attempted this, the table wouldn't refresh correctly and i had to implement insertObject: at<key>AtIndex and removeObjectFrom<Key>AtIndex methods.

Now my table will refresh and items are added, but I get an error:

*** Illegal NSTableView data source (<MyController: 0x3391a0>). Must implement numberOfRowsInTableView: and tableView:objectValueForTableColumn:row:

I don't get it. I can't figure out why in the Apple sample listed above they can just access the array directly, while my table won't refresh if I do it. I used bindings in the same way. And if I have to implement numberOfRows... and objectValyeForTable... methods, why use bindings anyway??? I thought bindings were supposed to take care of all this code. Do I really need the insertObject: and removeObject.. methods if i'm using bindings? And if so why aren't these methods implemented in the Apple sample?

Thanks for your time, this list is invaluable.
Juan <confused look>

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