kimon
Joined 15 years ago
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25
Submissions
6
Member since
Jul 12
Facebook Paper Lead Engineer • Push Pop Press Co-Founder • Apple iOS Engineer
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Comment · 12 years ago
KVOController 1.0.0 supports observing arrays and other ordered relationships, just not values within. I filed https://github.com/facebook/KVOController/issues/5 to track. Features requests are welcome.
Performing the initial callback manually, avoiding the KVO initiated one, was shown to be a performance improvement under certain KVO configurations.
We've updated the readme to include an example tracking the controller object. An instance variable should all that is necessary: https://github.com/facebook/KVOController.
Comment · 12 years ago
Correct. Add a strong reference from observer to KVOController instance via a property or instance variable and you've achieved un-observation on observer dealloc :)
This usage pattern is quite common. We'll look into calling this out more explicitly in the readme. Thanks for the feedback!
Comment · 12 years ago
This was the principal motivation behind KVOController. Manually tracking registered observers is tedious and error prone. We hope you give KVOController a try, feedback from the community is welcome.
Comment · 12 years ago
This is a useful collection of links. One point of note, Facebook's solution doesn't rely on swizzling. Much like THObserversAndBinders, KVOController ties observation to the controller scope.
We use a shared controller instance, that acts as a receptionist for all KVO notifications, as well as a weak reference to the observer, in order to safely allow observer removal on dealloc.
Comment · 14 years ago
each product team at Apple is different. some pay close attention to duplicate counts when prioritizing radars, others don't.
if instead you wanted to read between the lines: please file a dupe (we have no idea when that will be fixed.) no need to file a dupe (oh cute, you're still running that ancient public build?)