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Skillshub ios-dependency-injection

Standards for Protocol-based DI, Property Wrappers, and Factory/Needle. Use when configuring dependency injection or factory patterns in iOS. (triggers: **/*.swift, @Injected, Resolver, Container, Swinject, register, resolve)

install
source · Clone the upstream repo
git clone https://github.com/ComeOnOliver/skillshub
Claude Code · Install into ~/.claude/skills/
T=$(mktemp -d) && git clone --depth=1 https://github.com/ComeOnOliver/skillshub "$T" && mkdir -p ~/.claude/skills && cp -r "$T/skills/HoangNguyen0403/agent-skills-standard/ios-dependency-injection" ~/.claude/skills/comeonoliver-skillshub-ios-dependency-injection && rm -rf "$T"
manifest: skills/HoangNguyen0403/agent-skills-standard/ios-dependency-injection/SKILL.md
source content

iOS Dependency Injection Standards

Priority: P0

Implementation Guidelines

Protocol-Based DI (Manual)

  • Initializer Injection: Preferred method. Pass dependencies through 
    init
    .
  • Abstractions: Inject protocols instead of concrete classes to facilitate testing (Mocks/Stubs).

Modern Property Wrappers (Factory/Resolver)

  • Factory: Use the 
    Factory
    library for lightweight, type-safe navigation-friendly DI.
  • Swinject: Use for enterprise-grade container-based DI in large modular projects.
  • Injected: Use 
    @Injected
    property wrappers for cleaner syntax in ViewModels.

Scoping

  • Singleton: Use for app-wide services (Auth, Network, Database).
  • Unique/Transient: Default for ViewModels and temporary workers.
  • Graph/Cached: Use for shared data within a specific feature flow (Coordinator scope).

Anti-Patterns

  • No global singleton access everywhere: Inject service via initializer.
  • No Resolver.resolve() inside logic: Pass dependency via constructor.
  • No direct class instantiation: Depend on protocols for testability.

References