On Sep 15, 2014, at 5:00 PM, Jonathan Mitchell <jonat...@mugginsoft.com> wrote:

> I am using a NIB template, loading the same nib repetitively with a different 
> owner each time (a non NSViewController subclass).
> In the nib there is an NSValueBinding binding to the owner say: 
> self.itemValue.
> This all works fine.
> 
> However, nib owner items are not being dealloc’d.
> This behaviour only occurs if the nib contains a binding to self.

> Or should I refactor to make each NIB owner an NSViewController instance?

Yes.

From the release notes when NSViewController was originally introduced:
https://developer.apple.com/library/mac/releasenotes/AppKit/RN-AppKitOlderNotes/#NSViewController

> A new class, NSViewController, has been added to the AppKit in Mac OS 10.5. 
> It serves roughly the same purpose as NSWindowController, but for  views 
> instead of windows. It:
> • Does the same sort of memory management of top-level objects that 
> NSWindowController does, taking the same care to prevent reference cycles 
> when controls are bound to the nib file's owner that NSWindowController began 
> taking in Mac OS 10.4.


Regards,
Ken


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