Modern SwiftUI: Navigation, Part 2

Episode #216 • Dec 12, 2022 • Subscriber-Only

We add more screens and more navigation to our rewrite of Apple’s Scrumdinger, including the standup detail view, a delete confirmation alert, and we set up parent-child communication between features.

Navigation, Part 2
The standup detail view
The delete confirmation alert
Parent-child communication
Next time: effects

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So, this is absolutely incredible. Because we have decided to extract our feature’s logic into a proper observable object, we instantly get the ability to write tests. And these tests are covering very complicated logic, that we actually got wrong at first, and is even proving how focus moves around the screen.

So, while using a plain binding in the EditStandupView was the easiest way to get started with the feature, it definitely is not the most future proof way to structure things. Using bindings directly in the view means that all of your feature’s logic is going to have to be in the view. It will be very difficult to get test coverage on that logic, so as the feature gets more complex you may want to upgrade the binding to a proper model.

And with that the EditStandupView is feature complete and fully tested. It’s time to move onto the next piece of functionality in the application: the ability to drill down to a detail view so that you can make edits to an existing meeting.

Let’s quickly remind ourselves what that looked like over in Apple’s Scrumdinger application, and then see what it takes to rebuild.

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Getting started with Scrumdinger


Learn the essentials of iOS app development by building a fully functional app using SwiftUI.

SyncUps App

Brandon Williams & Stephen Celis

A rebuild of Apple’s “Scrumdinger” application that demosntrates how to build a complex, real world application that deals with many forms of navigation (e.g., sheets, drill-downs, alerts), many side effects (timers, speech recognizer, data persistence), and do so in a way that is testable and modular.

SwiftUI Navigation

Brandon Williams & Stephen Celis • Tuesday Sep 7, 2021

A library we open sourced. Tools for making SwiftUI navigation simpler, more ergonomic and more precise.

XCTest Dynamic Overlay

Brandon Williams & Stephen Celis • Wednesday Mar 17, 2021

XCTest Dynamic Overlay is a library we wrote that lets you write test helpers directly in your application and library code.

Packages authored by Point-Free

Swift Package Index

These packages are available as a package collection, usable in Xcode 13 or the Swift Package Manager 5.5.