Articles
In-depth articles about iOS programming, techniques, language features, architectual patterns, and beyond.
How to create Activity Ring in SwiftUI
A guide to creating an activity-ring-like circular progress bar in SwiftUI. An in-depth tutorial of what I think when making a custom view. At the end of this article, you will be able to create the Activity ring used in the Activity app on Apple Watch.
Gradient in SwiftUI
SwiftUI has built-in ways to apply gradient color to its view. We are going to explore all three types of gradients provided, LinearGradient, RadialGradient, and AngularGradient.
SwiftUI basic Shape operations
Most complex custom views can be made by composing many basic shapes together. Today we will learn basic operations that we can do with them. It may seem trivial, but knowing these basics will benefit you in the future.
Sign in with Apple Tutorial, Part 4: Web and Other Platforms
Part forth in a series Sign in with Apple. Use Sign in with Apple JS to let users set up accounts and sign in to your website and apps on other platforms.
Sign in with Apple Tutorial, Part 3: Backend – Token verification
Part 3 in a series Sign in with Apple. In this part, we will see how backend can use the token to sign up/sign in users.
Sign in with Apple Tutorial, Part 2: Private Email Relay Service
Part 2 in a series Sign in with Apple. In this part, we will talk about the anonymous email address. How to make it work and its limitation.
Sign in with Apple Tutorial, Part 1: Apps
Part 1 in a series Sign in with Apple. In the first part, we will focus on the app part. What we need to do to add Sign in with Apple option in our app.
Dark color cheat sheet
A cheat sheet that tells you what colors to use to support dark mode. This is a guide for those who want to adopt dark mode, but too lazy to figure out which color to use.
UINavigationBar changes in iOS13, Part2: UISearchController
Revisit of navigation bar appearance — this time with a UISearchController. If you have a search bar in your navigation bar, you might need to recheck when you build your app against iOS13.
Data in SwiftUI, Part 3: Tools
The last part in a series on understanding data in SwiftUI. See all tools SwiftUI provided to declare different types of data and dependency. Learn when and how to use @State, @Binding, ObservableObject, @ObservedObject, @EnvironmentObject, and @Environment.
Data in SwiftUI, Part 2: Views as a function of data
Part 2 in a series on understanding data in SwiftUI. We will talk about the key that makes principles in part 1 possible in SwiftUI. And how this resulting in a reduction of the complexity of UI development.
Data in SwiftUI, Part 1: Data
Part 1 in a series on understanding data in SwiftUI. In the first part, we will try to understand the importance of data and how they play an essential role in SwiftUI.
UINavigationBar changes in iOS13
Apple brings a lot of appearance changes in iOS13, and the navigation bar is one of them. Cover everything you should know once you build your app against iOS13 (Xcode11).
Adopting iOS Dark Mode
A long-awaited feature has finally come to iOS. Join it or not is your choice to make. This article will guide you through it.
Modality changes in iOS13
In iOS13, the modal presentation gets a new look and dismissal gesture. This article will talk about what you can do with these new welcoming changes.
Custom UIHostingController
Learn how to create a custom subclass of UIHostingController and its benefit.
SwiftUI's ViewModifier
Learn a crucial concept in SwiftUI, view modifier, and a guide of how to create your custom modifier.
Better dependency injection for Storyboards in iOS13
Say goodbye to optional properties in your view controllers. In iOS13, you can inject those properties at a time of view controller creation.
UISplitViewController in SwiftUI
WWDC session shows us a way to create UISplitViewController with NavigationView in SwiftUI. It finally works in Xcode 11 Beta 3.
Browse SF Symbols on Mac
SF Symbols contain over 1,500 icons. It would be hard if you don't know the existence of SF Symbols App.