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Key-Value Binding and Threads

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Key-Value Binding and Threads

Subject: Key-Value Binding and Threads
From: King Chung Huang <email@hidden>
Date: Mon, 26 Mar 2007 22:10:50 -0600

Before everyone groans: No, I'm not asking if KVB is "thread-safe".

Searching on CocoaBuilder, the consensus seems to be that KVB is not "thread-safe" in terms of mutating a key on a thread other than the main thread and expecting UI changes to occur correctly. Would I be correct in deducing that KVO/KVB change notifications are processed on the thread where willChangeValueForKey: etc. is implicitly or explicitly called? i.e., if I mutate an observed value on thread B, then observers will be notified on thread B? Can I safely observe a key on object A from object B, if both objects are safe to mutate on the same thread?

Thanks,

King Chung Huang
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