GCDMulticastDelegate

GCDMulticastDelegate is simple class that provides multicast/one-to-many delegation with proper support for GCD queues.

• It provides a means for managing a list of delegates.
• This class also provides proper support for GCD queues.So each delegate specifies which queue they would like their delegate invocations to be dispatched onto.
• All delegate dispatching is done asynchronously. It also uses weak refrences for keep delegates to avoid Memory Leak.
• It's completely thread-safe

For More Information You can refer to Observer Pattern

Installation

Simply just add GCDMulticastDelegate.swift to your project

Requirements

• iOS 8.0+ / macOS 10.10+ / tvOS 9.0+ / watchOS 2.0+
• Xcode 8.1+
• Swift 3.0+

Usage

1. Add to your class: let gcdMulticastDelegate = GCDMulticastDelegate<MyProtocol>()
2. implement addDelegate(deleg delegate:AnyObject, dispatch_queue queue:DispatchQueue) in your class
3. Other classes must be added as a delegate: serviceProvide.addDelegate(deleg: self, dispatch_queue: DispatchQueue.main)
4. When you need to notify your delegates: multicastDelegate.invoke {$0.someEvent()}

###Example

protocol FirstServiceProviderDelegate: class {    
    func onSomeEvent()
}

class FirstServiceProvider: NSObject {
    
    let multicastDelegate:GCDMulticastDelegate = GCDMulticastDelegate<FirstServiceProviderDelegate>()
    
    func testSomeEvent() {
        
        self.multicastDelegate.invoke {
            $0.onSomeEvent()
        }
    }
    
    public func addDelegate(deleg delegate:AnyObject, dispatch_queue queue:DispatchQueue){
        
        multicastDelegate.addDelegate(deleg: delegate as! FirstServiceProviderDelegate, queue: queue)
    }
    
    public func removeDelegate(deleg delegate:AnyObject, dispatch queue:DispatchQueue) {
        
        multicastDelegate.removeDelegate(deleg: delegate, queue: queue)
    }
}

    class ViewController: UIViewController , FirstServiceProviderDelegate{
    
    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.
        
        let service = FirstServiceProvider()
        service.addDelegate(deleg: self, dispatch_queue: DispatchQueue.main)
    }
    
    func onSomeEvent() {
        
        print("Some Event Delegate was called")
    }
}

use this if You prefer specific GCD queue:

    let service = FirstServiceProvider()
    let myQueue = DispatchQueue(label: "com.example.my-serial-queue")
    
    service.addDelegate(deleg: self, dispatch_queue: myQueue)

also Use removeDelegate for removing a class from delegates list

You will find a sample usage of GCDMulticastDelegate in GCDMulticastDelegateTests.swift