NSTableView contents not being refreshed properly

Question

I've set up an NSTableView , whose columns are bound to an NSArrayController which gets its contents from an NSMutableArray ( Matches ) of NSMutableDictionary instances.

Although the thing is working, I'm experiencing this issue :

When the Matches array is updated (and this may happen quite really often), the Table View may fail to update, but when the view is redrawn (eg when I minimize and reload my application) the contents appear just fine.

Any ideas on that? How could I make it redraw the view / update the contents?

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Hints :

• I've also used [tableView reloadData] after updating my Matches array, but without effect.
• This doesn't happen ALL the time, but some times... (that is it takes some patience and clicking here-and-there or minimizing the app, before the contents show up).

Answer 1

It sounds like you're manipulating the array directly. If so, you're doing it "behind the controller's back", so to speak. It doesn't get any kind of a notification that the array has changed.

Ideally, the array controller should be the object responsible for adding and removing things from its model; you should be using addObject: and removeObject: (or similar) on the controller , not the array itself.

Failing that, you can issue KVO notices ( willChangeValueForKey: and didChangeValueForKey: ) when you manipulate the array; that will make the controller pick up the changes.