Thank you Mr. Stiglitz.
It worked!!! :)
My original code accessed interested items in a data source using
objectForKey:. I think it is also KVO compliant call. And the data items
in the data source were all mutable types. So, the objectForKey also
returned a mutable array, but it didn't work.
So, we should use their special methods prepared for the binding purpose!
It would be much nicer if they put the examples in their
NSTreeController, NSOutlineView document!
Special Thanks!
JongAm Park
Benjamin Stiglitz wrote:
However, if I get reference of an item in existing view and insert
new item in its data source, NSMutableArray, it can't display the
newly added nested items.
I tried NSTreeController's rearragneObjects and the NSOutlineView's
reloadItem:reloadChildren, but it doesn't seem to work for me.
Can anyone tell me how to add new items?
Since you’re using NSTreeController, you should modify the array in a
KVO-compatible way. Take a look at
<http://developer.apple.com/documentation/Cocoa/Reference/Foundation/Protocols/NSKeyValueCoding_Protocol/Reference/Reference.html#//apple_ref/occ/instm/NSObject/mutableArrayValueForKeyPath:>
-Ben
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