While Swift is the hot new language right now in the Apple development community, there is no immediate sign that Objective-C is getting replaced fully. All of Apple's APIs are still written in Objective-C and it would be a lot of work for Apple to rewrite them, if they even wanted to. Apple definitely designed Swift to be able to live alongside Objective-C, so for now we have to assume that Objective-C is here to stay. This makes understanding and being able to interact with Objective-C very valuable, even as a Swift developer.
In this chapter, we have gotten an overview of the most pertinent Objective-C features and syntax from the point of view of a primarily Swift developer. We have learned how Swift is basically a part of a long line of evolving languages. It was heavily influenced by Apple's desire to make it backwards compatible with Objective-C and Objective-C was actually an evolution of C which was an evolution of Assembly and so on. Objective-C is still a powerful language...