Objective-C Invocation Forwarding
The big picture of Objective-C invocation forwarding.
Expose Mutable Properties as Immutable
It is a common API design pattern. But how to do it in Swift is not well known.
Objective-C Initializer Design Rules
Rules to follow when designing initializers.
The Complete Objective-C Messaging Flow
How do method lookup, dynamic resolution and message forwarding work together in objc_msgSend?
Delegate VS Block in API Design
Wherever delegate works block also works, but sometimes delegate is still a better choice in API design.
The Danger of Invisible Pools
The danger is in the invisible. The danger is in regions that are out of your control.
Defects of KVO
KVO is a very nice programming facility, except for some annoying defects.