Cannot remove observer from inside the observing block about kvocontroller HOT 5 CLOSED

Thank you for reporting this issue and appreciate your patience. We've notified the core team for an update on this issue. We're looking for a response within the next 30 days or the issue may be closed.

from kvocontroller.

Thank you for your patience. We're going to close out this issue. If you're still experiencing the problem described, please reopen the issue - thanks!

from kvocontroller.

I can confirm that I am still experiencing this problem when using 1.0.3. Can we reopen this issue?

from kvocontroller.

Hi @siyusong, even the native KVO system will call the block simultaneously before the registration of KVO if you specify option NSKeyValueObservingOptionInitial. At that time, the registration is not completed.
So I think it's not a bug of FBKVOController, you can just remove the Initial option as it's a limitation of KVO.

from kvocontroller.

Hi @wizzardchao,

Thanks for the explanation. I checked Apple's documentation of NSKeyValueObservingOptionInitial, and it indeed mentioned the fact that observer registration may not be completed in that case:

• NSKeyValueObservingOptionInitial

If specified, a notification should be sent to the observer immediately, before the observer registration method even returns.

However, I disagree with you that this is not a bug of KVOController. The OP of this issue and I are using - unobserve: in KVOController, not - removeObserver:forKeyPath: method in Foundation. The discussion section of - unobserve: clearly mentions that, if the object is not observed, "this method results in no operation".

Therefore, I think it's reasonable for me to expect that - unobserve: method (and its siblings) would never result in an error.

from kvocontroller.