Your First iOS & SwiftUI App: An App from Scratch

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Welcome to the final part of your first iOS and Swift UI app and app from scratch. In this part, you'll finally finish up the must-haves in your programming to-do list by adding the point calculation into the game. You'll start off by taking a deeper look at the Swift Standard Library, which is a library of functions written by engineers at Apple that you can use in your Swift code, and you'll use it to generate a random target number in Bullseye. Then you'll learn about the concept of unit testing, which is, basically, code you write that tests your other code. You'll add some unit tests to make sure the Bullseye data model is working the way you want and learn how you can incorporate unit testing into your daily development workflow with test driven development. In the remaining episodes you'll write the code to calculate the points for the game in a few iterations from naive to ideal. Along the way, you'll learn about some fundamental techniques of coding and Swift, such as if/else statements, variables and constants, type inference, and more. You'll also get a lot of practice with some things we covered in previous sections, because it's all about learning via repetition.