統一收notification再以delegate分派出去的設計方式

//在UIEvents統一接收notification

@objc protocol UIEvents {

    func onError(notification: NSNotification)

}

class UIEventHelper {

    class func registerFusionEvents(eventReceiver: AnyObject) {

        NSNotificationCenter.defaultCenter().addObserver(

            eventReceiver, selector: "onFusionError:",

            name: FusionService.fusionErrorNotification, object: nil)

    }

}

//在你要使用的class，加入註冊跟實作delegate

//viewWillAppear

self.registerNotifications()

//viewWillDisappear

self. unregisterNotifications()

    // MARK: - Notification

func registerNotifications() {

    UIEventHelper.registerFusionEvents(self)

}

    

func unregisterNotifications() {

    UIEventHelper.unregisterUIEvents(self)

}

func onError(notification: NSNotification) {

//TODO:實作你的code

}