Write Programmatic Constraints for Swift Projects

Great layouts!

Photo by John Towner @heytowner

Difficulty: Beginner | Easy | Normal | Challenging
This article has been developed using Xcode 12.1, and Swift 5.3

Prerequisites:

• You will be expected to be aware how to make a Single View Application in Swift
• This article assumes that you are coding 100% programatically, and are using loadView for which I use this technique
• This article uses a UINavigationController
• A guard is mentioned in this article
• Closures are mentioned in passing

Terminology

Constraints: A constraint on the layout of a view

Storyboard: A way to graphically layout the UI in Xcode

Removing the Storyboard

Although this isn’t really part of this tutorial (there is a full guide on this here but essentially you can select Main.storyboard in the project inspector: