New posts in Key Value Observing

Observing changes to a UIView's window and superview properties

How can I do Key Value Observing and get a KVO callback on a UIView's frame?

An -observeValueForKeyPath:ofObject:change:context: message was received but not handled

Observing the editing property of a UITableViewController

NSManagedObject and KVO vs Documentation

How can i tell if an object has a key value observer attached