On Nov 11, 2009, at 5:35 PM, James Walker wrote: > I had a situation where removeObserver:forKeyPath: was called twice for the > same receiver (an NSUserDefaultsController), the same observer, and the same > key path. It threw an NSRangeException. But the KVO docs don't say anything > about removeObserver:forKeyPath: throwing an exception. Should this be > considered a documentation bug, or is it a bug that > -[NSUserDefaultsController removeObserver:forKeyPath:] threw an exception, or > should I have just expected this due to some general principle?
Cocoa reserves the use of exceptions for programming errors an unexpected runtime errors. Trying to remove an observer for a key path which has already been removed (or never registered) falls into the programming error class, so I wouldn’t expect this to be explicitly documented. Jim _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
