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Learn SwiftUI

You're reading from   Learn SwiftUI An introductory guide to creating intuitive cross-platform user interfaces using Swift 5

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Product type Paperback
Published in Apr 2020
Publisher Packt
ISBN-13 9781839215421
Length 316 pages
Edition 1st Edition
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Tools
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Author (1):
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Chris Barker Chris Barker
Author Profile Icon Chris Barker
Chris Barker
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Table of Contents (17) Chapters Close

Preface 1. Getting Started with SwiftUI 2. Understanding Declarative Syntax FREE CHAPTER 3. Building Layout and Structure 4. Creating Your First Application 5. Understanding Controls, Views, and Lists 6. Working with Navigation in SwiftUI 7. Creating a Form with States and Data Binding 8. Networking and Linking to Your Existing App Logic 9. Maps and Location Services 10. Updating for iPad with NavigationViewStyle 11. SwiftUI on watchOS 12. SwiftUI versus UIKit 13. Basic Animation in Views 14. Animations in Transitions 15. Testing in SwiftUI 16. Other Books You May Enjoy

Imperative syntax

Imperative syntax is the more common form of programming that's used as it's much more functional and requires the programmer to write code that will tell the compiler how we are going to achieve the goal, rather than ask politely. The following is an example of imperative syntax:

“I would like some boiled water, a teabag, milk, and sugar. Allow the tea to brew for n minutes then add n teaspoons of sugar and n amount of milk…… oh and remove the teabag."

Even with the preceding example, we could dig even deeper and say "I need some water, then boil the water" or "type or brand of sugar".

Let's take a look at the following Swift code. This is a typical class you may see when writing a standard Swift app. Take a closer look at the makeBrew() function and how each step is coded so that the compiler knows...

You have been reading a chapter from
Learn SwiftUI
Published in: Apr 2020
Publisher: Packt
ISBN-13: 9781839215421
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