Cobb
A light Swift library to manage dependency injection easily.
Installation
Install with CocoaPod.
pod 'Cobb'
Usage
Let's take as example a simple achitecture.
struct NetworkService {
func login(username: String, password: String) -> User {
...
}
}
struct DatabaseService {
func insert(user: User) {
...
}
}
struct Repository {
let network: NetworkService
let database: DatabaseService
func login(username: String, password: String) -> User {
let user = network.login(username: username, password: password)
database.insert(user: user)
return user
}
}Using Cobb builders it's possible to define dependencies of application's layers.
Dependencies {
Factory { Database() }
Factory { NetworkService() }
Singleton { Repository(network: inject(), database: inject()) }
}.dream()Then in other classes (such as UIViewController) or structs.
class FirstViewController: UIViewController {
@Injected var repository: Repository
override func viewDidLoad() {
super.viewDidLoad()
DispatchQueue.global(qos: .utility).async {
let user = repository.login(username: "[email protected]", password: "password")
DispatchQueue.main.async {
// Update UI
}
}
}
}injected() resolves automatically dependencies defined in Dependencies builder.
Factory defines a dependency that when resolved returns a new instance.
Singleton defines a dependency that behavies like a singleton, so when resolved returns the same instance through the whole application.
dream() actually configure dependencies.
@Injected resolves the dependency and return an instance of the specified type.
That's it!
Author
Dario Pellegrini, [email protected]
License
Cobb is available under the MIT license. See the LICENSE file for more info.