EventEmitter

A minimal type-safe event implementation in Swift.

Usage:

Create and emit a typed event:

let event = Event<Sting>()

event.emit("hola")

Create and emit a void event:

let voidEvent = Event<Void>()

voidEvent.emit()

Add an observer:

let observer = event.on { message in
	// do something
}

Add a one-time observer:

let oneTimeObserver = event.once { message in
	// do something
}

Unregister an observer:

// from the observer
observer.unregister()

// through the event
event.unregister(oneTimeObserver)

Re-register an observer:

observer.register()

Observer Groups:

Observer groups allow for the block registration/unregistration of multiple observers at once.

// initialize a group of observers
let group = ObserverGroup([
		eventA.on { ... },
		eventB.on { ... },
		...
	])

// unregister all observers in a group
group.unregisterAll()

// re-register a group of observers
group.registerAll()

Observer groups unregister all their memebers on deinit.

Note

Observer blocks are executed synchronously on the thread where emit is called