Project structure · Mobile
iOS app with SwiftUI project structure
Opens with creditsFor students building a native iPhone app in Swift. The tree starts from Xcode's App template and grows into feature folders with @Observable models, a small URLSession API client, a SwiftData offline cache and Swift Testing, then adds build configurations, privacy manifests, fastlane or Xcode Cloud releases and, for large teams, local Swift packages.
Curated by Tauseef FayyazIntermediate139 files and foldersXcode 27, Swift 6.4, iOS 27 SDKChecked October 2026How it grows
Each stage opens the explorer there
- 1Day 1What the scaffold and your first hour give you18 files and folders
- 2GrowingWhat a real app with features and tests adds+61 files and folders
- ProductionWhat running it for real users adds+33 files and foldersOpens with credits
- ExpertWhat a team needs to keep it healthy for years+27 files and foldersOpens with credits
How it is organised
- Group the app by feature (Features/Orders, Features/Auth), not by file type. Shared code moves to Core/ or DesignSystem/ only when a second feature needs it.
- Views draw state and forward actions. Screen state and logic live in an @Observable model, and models talk to services through protocols, so tests and previews can use fakes.
- Use what Apple ships first: SwiftUI, Observation, URLSession with async/await, SwiftData, Swift Testing, string catalogs. Add a package only when it saves real work.
- Every view file keeps a #Preview, fed with fake data. Previews are the fastest feedback loop you have.
- Settings that differ per environment live in xcconfig files, one per build configuration. Nothing secret ships in the app; real secrets stay on your server and tokens go in the Keychain.
- Commit shared schemes and Package.resolved; never commit xcuserdata. CI must be able to build from a clean clone.
- Test in layers: many fast unit tests, a few UI tests for the journeys that matter, snapshots for key views at large text sizes.
- Split into local Swift packages only when the app is big enough that boundaries and build times hurt.
At the top of the project
Open one in the explorer for the full story
- MyApp/
- MyApp/The app target's source folder: Swift files, assets and resources.11 inside
- MyApp.xcodeproj/The Xcode project: targets, build settings, signing and schemes. A folder that looks like a file in Finder.4 inside
- MyAppTests/Unit tests, written with Swift Testing (@Test and #expect).6 inside
- MyAppUITests/UI tests with XCUITest: launch the app and tap through it like a user.2 inside
- scripts/Small shell scripts the team and CI share.2 inside
- .gitignoreIgnores xcuserdata, build output, DerivedData and fastlane reports.
- .swift-formatswift-format settings: line length, indentation and lint rules.
- .swiftlint.ymlSwiftLint rules, if the team wants checks beyond swift-format.
- AGENTS.mdInstructions for AI coding agents: commands, folder rules, patterns.
- CLAUDE.mdClaude Code instructions; usually one line pointing at AGENTS.md.
- MyApp.xctestplanThe UnitTests test plan: which tests run, in what configurations, with code coverage on.
- Products.storekitA StoreKit configuration file for testing in-app purchases locally.
- README.mdHow to open, run, test and release the app.
Learn more on Sefism
Roadmaps, cheat sheets and projects that go with iOS app with SwiftUI.
- Roadmap· iOSMobile development roadmapApps for Android and iOS
- RoadmapSoftware design and clean code roadmapOOP, SOLID, design patterns, refactoring
- RoadmapCoding with AI tools roadmapClaude Code, Cursor, Copilot, used well
- Cheat sheetMobile development cheat sheetApps for Android and iOS.
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- QuestionWhat projects should I build in my first year of university?Build small, finished projects that solve problems you or people around you actually have: a script that automates a chore, a command line tool, a simple website for a society or family business. First year is about finishing things and using Git, not about impressive ideas.
- QuestionWhat does proof of work mean for a fresher developer?Proof of work is evidence someone can check in a few minutes that you can do the job: a deployed project real people could use, readable code with tests, a pull request merged into someone else's project, or a clear write-up of a problem you solved. It replaces the experience a fresher does not have yet, so it must be easy to find and easy to verify.
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- Resource· GuideApple Developer DocumentationApple's official reference and guides for building apps on its platforms: Swift, SwiftUI, UIKit, SwiftData, Foundation, networking, notifications, location, testing, Instruments and app distribution. Tutorials get you started, but this is where iOS and macOS developers look things up once they are building their own app. Many framework pages include runnable sample code projects, and it is free to use without a paid developer account.
- Resource· Course100 Days of SwiftUIA free, structured course by Paul Hudson that takes you from Swift basics to building a series of complete SwiftUI apps, with a short video or article lesson each day, review tests and regular consolidation days. The daily format makes it easy to keep going, and the projects cover the core of real iOS work. It assumes no prior Swift but needs a Mac with Xcode.
- Resource· GuideOWASP Mobile Application Security (MASVS and MASTG)OWASP's mobile security project for Android and iOS. The MASVS standard defines what a secure app must do across storage, cryptography, authentication, networking, platform interaction, code, resilience and privacy, and the MASTG testing guide shows how to check each on a real device. Use it to decide where tokens and personal data may live, and as a security checklist before release.
- Resource· GuideGitHub Actions DocumentationThe official documentation for GitHub Actions, GitHub's built in CI/CD and automation system: workflow syntax, triggers, runners, caching, artifacts, environments, secrets and OpenID Connect deployments to AWS, Azure and Google Cloud. Actions is free for public repositories on standard runners, so it is the CI tool most students and open source projects learn first. It suits developers setting up tests and deployments for the first time.
Checked against 18 official sources, October 2026. If something has changed, the docs win.Show sourcesHide sources
- Xcode release notes
- Xcode: Creating an Xcode project for an app
- SwiftUI: App organization
- Observation framework
- SwiftData
- Swift Testing
- Xcode: Organizing tests to improve feedback (test plans)
- Xcode: Localizing and varying text with a string catalog
- Privacy manifest files
- Xcode: Adding a build configuration file to your project
- Xcode Cloud: Writing custom build scripts
- App Store Connect: Upcoming requirements
- Swift Package Manager
- swift-format
- swift-openapi-generator
- fastlane docs: iOS setup and match
- swift-snapshot-testing
- OWASP Mobile Application Security
Best practices and checklists for this stack
Picked from the other libraries by shared topics.
Best practices
See all- React Native Best PracticesReact Native best practices for 2026: Expo and the New Architecture, fast lists, smooth animations, safe storage, deep links, accessibility and release builds.
- Flutter Best PracticesFlutter best practices for 2026: sound null safety, cheap build methods, layered architecture, smooth frames, go_router, accessibility, testing and safe releases.
- Software Testing Best PracticesTesting best practices for unit, integration and end-to-end tests: test design, test doubles, flaky tests, coverage and fast CI, with examples in TypeScript and Python.
Checklists
See all- App Store and Google Play Launch ChecklistLaunch a mobile app on the App Store and Google Play: accounts, build rules, review guidelines, privacy labels, Data safety, listing, in-app purchases, testing, crashes and staged rollout.
- Mobile App Security ChecklistCheck an Android or iOS app against OWASP MASVS: data storage, network security, authentication, platform interaction, code quality, resilience and privacy.
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