Injection

Injection is a tiny utility to help managing dependency injection with SwiftUI.

Why would I use this?

You shouldn't 😅 there's plenty of dependency injection libraries for swift out there - by no means is this intended to replace any of those. For my personal use cases, there's two main intents:

• Simplify adding custom EnvironmentValues
• Be able to use a similar api to EnvironmentValues for objects that aren't meant to be Observable or should not belong in the View's EnvironmentValues

Usage

import Injection

struct DependencyOne { ... }
struct DependencyTwo { ... }

// 1: Add the @Inject macro to the extension
@Inject 
extension EnvironmentValues {
    var dep1 = DependencyOne()
    var dep2 = DependencyTwo()
}

// 2: Use it normally with the @Environment property wrapper
struct ExampleView: View {
    @Environment(\.dep1) var dep1
    @Environment(\.dep2) var dep2

    var body: some View { ... }
}

The same logic also applies to the simpler container DependencyValues:

import Injection

struct DependencyOne { ... }
struct DependencyTwo { ... }

// 1: Add the @Inject macro to the extension
@Inject 
extension DependencyValues {
    var dep1 = DependencyOne()
    var dep2 = DependencyTwo()
}

// (optionally) set it elsewhere in the view hierarchy

@main
struct ExampleApp: App {    
    var body: some Scene {
        WindowGroup {
            ContentView()
                .dependency(\.dep1, DependencyOne())
        }
    }
}

// 2: Use it with the @Dependency property wrapper
struct ExampleView: View {
    @Dependency(\.dep1) var dep1
    @Dependency(\.dep2) var dep2

    var body: some View { ... }
}

Installation

Swift Package Manager

If you're working directly in a Package, add Injection to your Package.swift file

dependencies: [
    .package(url: "https://github.com/JARMourato/Injection.git", .upToNextMajor(from: "2.0.0" )),
]

If working in an Xcode project select File->Swift Packages->Add Package Dependency... and search for the package name: Injection or the git url:

https://github.com/JARMourato/Injection.git

Contributions

If you feel like something is missing or you want to add any new functionality, please open an issue requesting it and/or submit a pull request with passing tests 🙌

License

MIT

Contact

João (@_JARMourato)