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How subclass NSTreeController's -(void)insertChild:?

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How subclass NSTreeController's -(void)insertChild:?

Subject: How subclass NSTreeController's -(void)insertChild:?
From: Thilo Ettelt <email@hidden>
Date: Thu, 18 May 2006 16:23:30 +0200

Hello list,

I want to add a child to my NSTreeController. The child needs to have an object passed through its initializer (i.e. -initWithObject:). So I thought I would subclass -(void)insertObject and manually put the object in the array to which the controller is bound. This however gives me a strange message:

unexpected state: trying to insert object <Category: 0x3c1770> failed. Destination node == nil or destination node did not retain the object


How can I call my inizializer and add a child anyway now?


Thx in advance,
Thilo
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