MulticastDelegate

An elegant multicast delegate written in swift with Unit tests

Installation

Manual

Copy MulticastDelegate.swift to your project

CocoaPods

    pod 'MulticastDelegateSwift'

Swift Package Manager

You can use Swift Package Manager and specify a dependency in Package.swift by adding this:

.Package(url: "https://github.com/jonasman/MulticastDelegate.git", majorVersion: 2)

Usage

Import the module

    import MulticastDelegateSwift

1. Add to your class: let multicastDelegate = MulticastDelegate<MyProtocol>()
2. Other classes must add as a delegate: service.delegate.addDelegate(self)
3. When you need to notify your delegates: multicastDelegate.invokeDelegates { delegate in delegate.done() }

Alternative version:

1. Add to your class: let multicastDelegate = MulticastDelegate<MyProtocol>()
2. Other classes must add as a delegate: service.delegate += self
3. When you need to notify your delegates: multicastDelegate |> { $0.done() }

Example

protocol ServiceDelegate {
    func serviceGotData()
}

class Service {
    
    var delegate = MulticastDelegate<ServiceDelegate>()
    
    func fetchData() -> Bool {
        // fetch Data and notify your delegates
        // Call your delegates 
        delegate |> { delegate in
            delegate.serviceGotData()
        }
        return true
    }
}

class MainViewController: UIViewController, ServiceDelegate {
    
    func serviceGotData() {
            // do nothing
    }
}

let service = Service()
let viewController = MainViewController()
        
service.delegate += viewController
        
service.fetchData()

Operators

There are 3 operators to simplify the multicast usage

+= calls addDelegate(delegate: T)

-= calls removeDelegate(delegate: T)

|> calls invokeDelegates(invocation: (T) -> ())

Considerations

The code is based on HashTable with weak objects, so you don’t need to worry when a delegate is deallocated

Licence

The MIT License (MIT)

Copyright (c) 2014 João Nunes

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.