发送通知

let dic = ["name":"hello"];
NSNotificationCenter.defaultCenter().postNotificationName("NotificationIdentifier",object: dic)

接收通知

NSNotificationCenter.defaultCenter().addObserver(self,selector: "getMyName:",name:"NotificationIdentifier",object: nil)

删除通知

NSNotificationCenter.defaultCenter().removeObserver(self,name: "NotificationIdentifier",object: nil)
NSNotificationCenter.defaultCenter().removeObserver(self)

func getMyName(notification:NSNotification){

        //获取词典中的值
        let name = notification.object?.valueForKey("name") as? String

        //通知的名称
        let nameNotification = notification.name

        //notification.userInfo 接收object 对象 一些信息 例如入键盘的一些信息

        print(nameNotification)

        print(name);
    }