Service Locator pattern implementation in Swift 2.

ServiceLocator.swift

class ServiceLocator {
    lazy var s = [String: Any]()
    
    func add(services: Any...) {
        for service in services {
            s[typeName(service)] = service
        }
    }
    
    func get<T>(_: T.Type) -> T? {
        return s[typeName(T)] as? T
    }
    
    private func typeName(some: Any) -> String {
        return (some is Any.Type) ? "\(some)" : "\(some.dynamicType)"
    }
}

//Example

class Service1 {
    
    func description() -> String {
        return "Hello! I'm Service1"
    }
    
}

class Service2 {
    
    func description() -> String {
        return "Hello! I'm Service2"
    }
    
}

let sl: ServiceLocator = {
    let sl = ServiceLocator()
    sl.add(Service1(), Service2())
    return sl
}()

sl.get(Service1)?.description() //"Hello! I'm Service1"
sl.get(Service2)?.description() //"Hello! I'm Service2"