Re: How do I know when a new object is added to an NSArray or NSCollectionView?
Re: How do I know when a new object is added to an NSArray or NSCollectionView?
- Subject: Re: How do I know when a new object is added to an NSArray or NSCollectionView?
- From: Quincey Morris <email@hidden>
- Date: Sun, 10 Jan 2010 12:19:57 -0800
On Jan 8, 2010, at 17:02, Brad Stone wrote:
> I'd like a viewController to be notified whenever an arrayController adds a new object. Here's why:
...
> 1) how do I get notified if a new object is added?
http://developer.apple.com/mac/library/documentation/Cocoa/Conceptual/KeyValueObserving/Concepts/KVOBasics.html
You can observe the "arrangedObjects" property of the array controller, or you can observe the same array property in your data model that your arrayController is bound to (its "contentArray").
> 2) how do I make the NSTextField in the view that just was added ready and waiting to be typed in?
http://developer.apple.com/mac/library/documentation/Cocoa/Reference/ApplicationKit/Classes/NSWindow_Class/Reference/Reference.html#//apple_ref/occ/instm/NSWindow/makeFirstResponder:
All views know what window they're in ([view window]) so it's easy to do both #1 and #2 given just a pointer to the view controller and a pointer to the array controller._______________________________________________
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