Framing your App Store screenshots greatly improves your store listing. But doing it manually takes hours away from perfecting your app. Instead, here’s how you automate the process of adding…

Written by: Steven Chung, Senior iOS Engineer | Revenue Team

Over time, any code base grows along with the project evolves and matures. It creates two main constraints for developers: how to have a code well organized while keeping a build time as low as possible. Let’s see how a modular architecture can fix that.

A common annoyance using iOS share sheets that just opening them will lock up the UI before showing options. UIActivityItemProvider is the solution.

Learn to implement basic cryptography with CryptoKit in Swift.

Let’s take a look at a few different techniques that can let us achieve a nice balance between code reuse and configurability, by building lightweight abstractions that enable us to encapsulate our configuration code.

Diagnostics play a very important role in a programming language experience. It’s vital for developer productivity that the compiler can produce proper guidance in any situation, especially incomplete or invalid code.

How LookUp was designed to provide a native macOS Experience, as a Catalyst app.

Value types and reference types are the core concepts in Swift. Let's study what are value and reference semantics; how Swift structs and classes are stored in memory; compare Swift structs and classes performance and suggest when to use what.

Working on a large iOS codebase often involves a lot of waiting. But with Xcode 11, our wait is finally over — and it’s all thanks to SwiftUI.

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.

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This week I want to talk about another crucial feature of any app, which is Localization. Every user expects that your app correctly uses environment features like the right-to-left layout or uses system locale to format dates or currencies. Another vital…

When designing APIs, using default arguments can often let us strike a nice balance between flexibility and ease of use — as they let us add solid, intuitive defaults to many of the configuration options that we’ll end up providing. Let’s take a look at a…