Crash When Unloading The Controller

[brandontreb]

I have a side menu structure and am trying to use this on the collection views for each item. When i tap a menu item, it replaces the active view controller with a new instance of the collection view controller containing the reorder able layout.

however, it crashes immediately. Removing the KVO solves the crash (but obviously makes the library useless).

any ideas?

thanks

[phil swenson]

what is "KVO"?

[Christoph Halang]

Key-Value-Observing ... basically a mechanism that allows objects to be notified of changes in properties of other objects.