Almost every project I work on has at least three build configurations: Debug, TestFlight, and App Store. These configurations differ not only in build settings but also in functionality. This week, we’ll learn how to implement feature flags in Swift, which allow us to toggle on and off specific functionalities under certain conditions.

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Learn how to implement feature flags in Swift to toggle functionality across different build configurations (Debug, TestFlight, App Store). The approach uses compilation conditions and a Distribution enum to manage features, with a FeatureFlags struct that defines which features are enabled for each build type. Feature flags are integrated into SwiftUI's environment system for easy access throughout the app, supporting trunk-based development by allowing incomplete features to be merged safely behind flags.

Feature flags in Swift