Objective-C in 2015

A summary of all the latest enhancements to Objective C. Dive in if you want to learn about: Nullability Annotations, Generics and KindOf.
View story at Medium.com

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Nullability and Objective-C

Xcode 6.3 added new annotations to ObjC. These annotations helps when you already have a large ObjC code base and you want to transition to Swift incrementally.
https://developer.apple.com/swift/blog/?id=25