Dependency Injection Example

Usage

Step 1 : Regist instance with protocol

Configurator.shared.regist(type: SampleInteractorPtorocol.self, instance: SampleInteractor())

Step2 : Define protocol, Inject the instance and use it

protocol SampleInteractorPtorocol {
  func doSomething()
}

class ViewController: UIViewController {
  
  lazy var interactor = Configurator.shared.inject(type: SampleInteractorPtorocol.self)

  override func viewDidLoad() {
    super.viewDidLoad()
    
    interactor?.doSomething()
  }
}

Step3 : Implements the protocol

class SampleInteractor : SampleInteractorPtorocol {
  func doSomething() {
    print("doing something")
  }
}

DI Configurator

• Very simple one source file : Configurator Source Code

Reference

• Wikipedia : Dependency Injection

Useful for clean-swift architecture, a.k.a VIP

• Clean Swift
• Clean Architecture

Other Swift DI Libs

• EasyInject
• DGDependencyInjector