Re: Controllers and Views

Subject: Re: Controllers and Views
From: mmalcolm crawford <email@hidden>
Date: Thu, 15 Jul 2004 18:20:58 -0700

On Jul 15, 2004, at 5:35 PM, Tim Conkling wrote:

The magical part that I can't quite wrap my head around is that, when the NSArrayController has an object added to or deleted from it, the NSTableView immediately reflects the changes, though I never made any binding from NSArrayController to the NSTableView. How does the array know about the table view? Do bindings somehow work both ways automatically?

Bi-directional synchronisation is the main feature of Cocoa bindings. The array does not, though, know about the table view; the array controller is responsible for manipulating the array using key-value coding (typically via suitable accessor methods implemented by the object that contains the array). See:

<http://developer.apple.com/documentation/Cocoa/Conceptual/ CocoaBindings/Concepts/WhatAreBindings.html>
and
<http://developer.apple.com/documentation/Cocoa/Conceptual/ CocoaBindings/Concepts/HowDoBindingsWork.html>

mmalc
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References:
	>Controllers and Views (From: Tim Conkling <email@hidden>)

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