fsjack/JKTabBarController — pull request #5 by YuAo (2014-10-14 08:20:47+00:00)
Title: KVO removeObserver fix

Weak reference to `JKTabBarController` is automatically `nil`ed when the tab bar controller dealloc. Thus in `-[_JKTabBarMoreViewController dealloc]` the `self.tabBarController` is always nil.

Making `tabBarController` a `unsafe_unretained` reference resolved this issue.