Hands-On Design Patterns with Swift

Control Freak

The first one is pretty easy to spot: we are not using the Injection at all. Instead of being Injected, the dependency is instantiated inside the object that depends on it:

class FeaturedProductsController {    private let restProductsService: ProductsService    init() {        self.restProductsService = RestProductsService(configuration: Configuration.loadFromBundleId())    }}

In this example, ProductsService could have been injected in the constructor but it is instantiated there instead.

Mark Seeman, in his book "Dependency Injection in NET", Chapter 5.1 - DI anti-patterns, calls it Control Freak because it describes a class that will not relinquish its dependencies.

The Control Freak is the dominant DI anti-pattern and it happens every ...