objc.io

We rebuild the model layer with structs instead of classes and use bindings to provide mutable access to the views.

Episode 202 · May 08

We use published properties and property observers to clean up our model code, and we fix some issues on the iPad.

Episode 201 · May 01

We take a callback-based model API and refactor it into an observable object.

Episode 200 · Apr 24

We create a lazy wrapper for observable objects and use dynamic member lookup to ease its use.

Episode 199 · Apr 17

We wrap a UIKit alert in a SwiftUI-like API to present an alert with a text field.

Episode 198 · Apr 10

We continue working on the recording and playback screens while reusing existing model and helper classes from the MVC app.

Episode 197 · Apr 03

We start to implement the MVC sample app from our App Architecture book in SwiftUI reusing the original model.

Episode 196 · Mar 27

We wrap an MKMapView, using a diff on the annotations to properly animate insertions and removals.

Episode 195 · Mar 20

We create a view that automatically scales a text view to fill the available space.

Episode 194 · Mar 13

We add labels to the analog clock face, and we make it configurable to reuse it for counting the minutes.

Episode 193 · Mar 06

We draw an analog clock face and add moving pointers.

Episode 192 · Feb 28

We add lap times to the model, show them in a list, and highlight the shortest and longest laps.

Episode 183 · Dec 20 2019

We add the data model for the stopwatch to make it functional.

Episode 182 · Dec 13 2019

We enable our stopwatch buttons to self-size to fit their labels.

Episode 181 · Dec 06 2019

We use a custom button style to imitate the appearance of the stopwatch buttons on iOS.

Episode 180 · Nov 29 2019

We refactor our use of geometry readers and preferences to make our code more expressive.

Episode 179 · Nov 22 2019

We implement the drop functionality and work around several obstacles we encounter along the way.

Episode 178 · Nov 15 2019

We make our shopping cart interactive by adding drag and drop.

Episode 177 · Nov 08 2019

We use a view modifier with local state to animate views onto the screen.

Episode 176 · Nov 01 2019

We use anchors, preferences, and transitions to animate items from a grid into a cart.

Episode 175 · Oct 25 2019

We examine SwiftUI's animation curves using a custom view modifier.

Episode 174 · Oct 18 2019

We explore SwiftUI's rendering and animation model while building a shake animation.

Episode 173 · Oct 11 2019

We use drag gesture recognizers to add reordering capabilities to our SwiftUI collection view.

Episode 169 · Sep 13 2019

We implement single-line and flow layouts for our SwiftUI collection view.

Episode 168 · Sep 06 2019

As a first step toward a collection view, we enable child views to communicate their sizes to a parent view.

Episode 167 · Aug 30 2019

We further refine the animation from last episode and refactor it using a geometry effect.

Episode 166 · Aug 23 2019

We start building a custom animation of a shape that moves along a path.

Episode 165 · Aug 16 2019

We experiment with paths and shapes to create a triangular preview badge.

Episode 164 · Aug 09 2019

We integrate Apple's web authentication framework to enable logging in with GitHub and then store the credentials using a keychain property wrapper.

Episode 163 · Aug 02 2019

We create a two-way binding from the play position of the video player to a bindable model object.

Episode 162 · Jul 26 2019

We integrate an AVPlayerViewController, expose its play state as a binding, and use a SwiftUI view as an overlay.

Episode 161 · Jul 17 2019

We look at different ways to load data from the network less eagerly.

Episode 160 · Jul 12 2019

We explore different approaches to passing data around in our SwiftUI app.

Episode 159 · Jul 05 2019

We start building a Swift Talk app using SwiftUI.

Episode 158 · Jun 28 2019

We integrate the tiny networking library into a SwiftUI project and wrap AppKit's progress indicator in a SwiftUI view.

Episode 157 · Jun 21 2019

We build a simple currency converter to experiment with SwiftUI's state-driven view updates.

Episode 156 · Jun 14 2019