Small Swift events kit that provides some base types of events:

• FutureEvent
• PresentEvent
• PastEvent

Simple event. Provides classic behaviour.

This is classic event (like C# event) that can contain many listeners and multicast each new message for this listeners. This event emits only new messages. It means if you add a new listener to existed event then last will not emit previous messages to the new listener.

• FutureEvent: Event

var event = FutureEvent<Int>()

event += { value in
  print("Awesome int: \(value)")
}

event.invoke(with: 42)

will print Awesome int: 42

This event provides all Future logic, but additionally provides emiting last emited value for a new listener. It means if your event already emits value and you add a new listener then your listener handles previous emited value in the same time.

• PresentEvent: Event

var event = PresentEvent<Int>()

event += { value in
  print("Awesome int: \(value)")
}

event.invoke(with: 42)

event += {
    print("Old awesome int: \(value)")
}

will print:

Awesome int: 42

Old awesome int: 42

This event is like the Present, but emits all previous messages for a new listener

• PastEvent: Event

var event = PastEvent<Int>()

event.invoke(with: 0)
event.invoke(with: 1)

event += { value in
  print("Awesome int: \(value)")
}

event.invoke(with: 2)

Will print:

Awesome int: 0

Awesome int: 1

Awesome int: 2

pod 'CoreEvents', '~> 2.0.1'

We also support SPM:

.package(url: "https://github.com/surfstudio/CoreEvents", .exact("2.0.2"))

In one file you can not use just add, you should specify a key - add(key: String, _ listener: Closure)

Version format is x.y.z where

• x is major version number. Bumped only in major updates (implementaion changes, adding new functionality)
• y is minor version number. Bumped only in minor updates (interface changes)
• z is minor version number. Bumped in case of bug fixes and e.t.c.

Kravchenkov Alexander

MIT License