Understanding Xcode targets, schemes and build configurations

When we develop an iOS application, we usually need to support multiple environments like debug, staging, and release. The first step in that process is understanding how Xcode organizes our project into targets, schemes, and configurations.

Let's walk through these concepts together.

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When we create a new Xcode project, it automatically includes:

• An app target
• Two test targets
• A default scheme
• Two build configurations: Debug and Release

This gives us a strong starting point, but to add more environments and customize behavior, we first need to understand the roles of each component.

What is a target?

Xcode projects contain targets, which specify how a product is built. Each target has its own build settings and phases. Targets can override settings defined at the project level.

Think of a target as a blueprint for building something specific in an app project. For example, we might have one target for the main iOS app, and another for a Share Extension or a Watch app. Each target defines how that specific product is built, including source files, resources, and its own build settings.

What is a scheme?

An Xcode scheme defines how Xcode builds, runs, tests, archives, and profiles our app. It also controls which build configuration is used for each action.

We can think of a scheme like a shortcut. It tells Xcode what to build and how to run it for different actions. For example, we can create a scheme called ExampleApp Staging that runs the app using a staging backend and another scheme called ExampleApp Release for the production environment.

Each scheme is linked to a target and lets us assign which build configuration it should use when running or testing.

What is a build configuration?

A build configuration tells Xcode how to build a target. Each one has its own set of build settings.

By default, Xcode gives us two:

• Debug: fast builds, debug info included
• Release: optimized builds, no debug info

We can add more, like Staging, to test production-like environments.

What's next?

By combining targets with schemes and build configurations, we can fully control our build pipeline for each environment.

➡️ Continue reading: Creating and managing multiple app environments in Xcode.