The Service Locator Pattern in Swift

Avoid Dependency Injection entirely!

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The service locator pattern is designed to encapsulate the processes invovled in obtaining a service with a strong layer of abstraction.

Prerequisites:

• You will be expected to be aware how to make a Single View Application, or a Playground to run Swift code
• This article avoids Dependency Injection, but you should be aware of what that is
• This article refers to the Singleton pattern

The explanation

Service locator has a central registry known as the service locator, that on request returns the data required to perform a task. The service locator returns instances of services when they are requested by the service consumers or service clients.

The Service Locator pattern does not describe how to instantiate serveices, rather it describes a way to register services and locate them.

The Example

Here is an example. This example is written with a Playground in mind: In fact the tests are included (and will…