A micro-framework that leverages Swift Property Wrappers to implement the Service Locator pattern

Related tags

Animation locatable
Overview

Locatable

platforms pod Carthage compatible

Context

Locatable is a Swift micro framework that leverages Property Wrappers to implement the Service Locator pattern, through a custom attribute @Locatable.

Here's an example of how it can be used:

protocol Servicing {
    func action()
}

class Service: Servicing {
    func action() {
        print("I'm performing a service 😊")
    }
}

Locator.register(Servicing.self, { return Service() })

class MyController {
    @Locatable(.sharedInstance) var service: Servicing
    
    func work() {
        self.service.action()
    }
}

let controller = MyController()

controller.work() // I'm performing a service 😊

For convenience, some shorthand syntax are also available:

// leverages @autoclosure
Locator.register(Servicing.self, Service())

// leverages default argument values
Locator.register { return Service() as Servicing }

Service locating supports two distinct semantics:

// Will return an instance that is shared across the app
Locatable(.sharedInstance) var service: Servicing

// Will return a new instance every time
Locatable(.newInstance) var service: Servicing

Requirements

Xcode 11+ & Swift 5.1

Installation

CocoaPods

Add the following to your Podfile:

pod "Locatable"

Carthage

Add the following to your Cartfile:

github "vincent-pradeilles/locatable"

Author

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Comments
  • Use auto closure and inferred type

    Use auto closure and inferred type

    On my phone so not ideal to make the PR myself but you should change to this:

    static func register<T>(_ type: T.Type = T.self, _ factory: @autoclosure @escaping () -> T) {

    This would allow the call site to either choose to use the autoclosure feature:

    Resolver.register( Servicing.self, Service() )

    Or to use the = T.self and inference and be able to write:

    Resolver.register { Service() as Servicing }
    opened by AliSoftware 1
  • Fixed a compilation error in 'Locatable'

    Fixed a compilation error in 'Locatable'

    Fixed a Swift 5 compilation error in 'Locatable' which was complaining of wrapper type 'Locatable' missing a non-static property named 'wrappedValue'. Renaming the Locatable.value property to Locatable.wrappedValue fixes it.

    opened by adil-hussain-84 0
Owner
Vincent Pradeilles
French iOS software engineer, working in Lyon, France 🇫🇷
Vincent Pradeilles
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