Chapter 13. Using Mix and Match

When Apple first introduced Swift at WWDC 2014, my first thought was how much work it would be for developers to rewrite their apps, which were already written in Objective-C, in Swift. A lot of these applications are pretty complex and would take a lot of effort to rewrite. Somewhere in the Swift presentation, Apple spoke about mix and match, which allows Swift and Objective-C to interact within the same project. Mix and match sure sounded like the ideal solution because developers could rewrite sections of their code in Swift as they needed to do updates, instead of having to rewrite their whole application. My big question was how well mix and match would actually work, because I definitely had my doubts. I must confess that I was very surprised. Not only did mix and match work as advertised, but it was also very easy to implement.

In this chapter, we will cover the following topics:

• What is mix and match?
• How to use Swift and Objective-C together...