While Swift is the hot new language right now in the Apple development community, there is no immediate sign that Objective-C is getting fully replaced. All of Apple's APIs are still written in Objective-C and it is going to be a lot of work for Apple to rewrite them, if they even want to. Apple definitely designed Swift to work alongside Objective-C, so for now, we have to assume that Objective-C is here to stay. That makes understanding and being able to interact with Objective-C very valuable, even as a Swift developer.

In this chapter, we got an overview of the most pertinent Objective-C features and syntax primarily from the point of view of a Swift developer. You learned how Swift is a part of a long line of evolving languages. It was heavily influenced by Apple's desire to make it backward compatible with Objective-C, and Objective-C was actually an evolution on top of C, which was an evolution on Assembly, and so on. Objective-C is still a powerful language with the ability...