Created
May 15, 2017 19:23
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| import Foundation | |
| struct Event<T> { | |
| let key: String | |
| } | |
| extension Event { | |
| var notificationName: Notification.Name { | |
| return Notification.Name(key) | |
| } | |
| } | |
| protocol TypedNotificationDispatching { | |
| func register<T>(for: Event<T>, _: @escaping (T) -> Void) -> NSObjectProtocol | |
| func emit<T>(_ :Event<T>, withPayload: T) | |
| } | |
| extension NotificationCenter: TypedNotificationDispatching { | |
| func register<T>(for event: Event<T>, _ callback: @escaping (T) -> Void) -> NSObjectProtocol { | |
| return addObserver(forName: event.notificationName, object: nil, queue: .main, using: { notification in | |
| callback(notification.object as! T) | |
| }) | |
| } | |
| func emit<T>(_ event: Event<T>, withPayload payload: T) { | |
| post(name: event.notificationName, object: payload) | |
| } | |
| } | |
| //Usage | |
| struct Login { | |
| let token: String | |
| } | |
| extension Event where T == Login { | |
| static var onLogin: Event<Login> { | |
| return Event(key: "weakLoginKey") | |
| } | |
| } | |
| var typedNotificationCenter = NotificationCenter.default | |
| typedNotificationCenter.register(for: .onLogin, { login in | |
| //Handle login | |
| //print(login.token) | |
| }) | |
| typedNotificationCenter.emit(.onLogin, withPayload: Login(token: "token")) // emit login event |
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