How to use "context" in " observeValueForKeyPath:ofObject:change:context:"

Asked Jun 22 '14 at 08:04

Active Jun 22 '14 at 08:04

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Having read KVO guide, KVC guide, KVO protocol ref, I have never seen a solid example on how/when to use the last parameter of observeValueForKeyPath:ofObject:change:context:

the description on this "context" is so vague in Apple's document, so are the examples through KVO/KVC!

Can anyone point it out for me? Many thanks!!!

asked Jun 22 '14 at 08:04

J-Q

Possible duplicate of [importance of context parameter in Key value observing](http://stackoverflow.com/questions/11916502/importance-of-context-parameter-in-key-value-observing) – Sven Driemecker Jun 22 '14 at 10:52
Sven, thanks! I got it. – J-Q Jun 22 '14 at 22:02

How to use "context" in " observeValueForKeyPath:ofObject:change:context:"

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