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Writing the Difference Calculation Challenge - Beginning Programming with iOS 11, Swift 4, & Xcode 9

706 views · Published 10 May 2018 · 1:57 · Indexed 22 September 2026

Channel: Kodeco · 2018 · Education

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Try improving the algorithm to calculate the difference so it is written in less lines of code.

This is a new course that will be released entirely free on YouTube. To learn about this course and other courses on iOS development, check out raywenderlich.com.

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About www.raywenderlich.com:

raywenderlich.com is a website focused on developing high-quality programming tutorials. Our goal is to take the coolest and most challenging topics and make them easy for everyone to learn – so we can all make amazing apps.

We are also focused on developing a strong community. Our goal is to help each other reach our dreams through friendship and cooperation. As you can see below, a bunch of us have joined forces to make this happen: authors, editors, subject matter experts, app reviewers, and most importantly our amazing readers!

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The tutorial team and I are happy to announce that we’ve released our very first video course on Udemy: iOS 11 and Swift 4 for Beginners!

This course is intended for complete beginners to iOS 11 and Swift 4 development and represents a collection of some of the best tutorials from our site.

This course is for absolute beginners to iOS 11 or Swift 4 development — or even for absolute beginners to programming in general.

You’ll start the course with a bang by creating your first app, an entertaining game called Bulls-Eye.

In this section, you will learn how to add basic controls like labels, buttons, and sliders into a Swift 4 and iOS 11 app.

This section contains 10 videos:

Introduction: Learn about the first app you’ll build – a simple but fun game called Bull’s Eye – and get a preview of all the things you’ll learn throughout this section.

Making a Programming to-do list: Make a programming to-do list of all the things you’ll need to do to build the game. This helps build a good programming practice of gathering requirements first!

Buttons and Actions: Learn how to add a button to the app and connect it to some Swift 4 code that prints a message to the console.

Alerts: Learn how to make the app display a popup alert when you tap a button.

Solving Problems: Learn how to solve problems beginners frequently run into.

Challenge: Connecting Actions: Practice connecting an action performs on a button – such as a tap – to some Swift code that you write.

How Does an App Work: Learn how apps actually work under the hood.

Portrait vs. Landscape: Learn how to convert your app from portrait to landscape mode.

Challenge: Basic Controls: Practice adding basic controls like sliders, buttons, and labels into your app by creating the basic layout for the Bulls-eye game.

Conclusion: Let’s review where you are with your programming to-do list, and discuss what’s next.

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