IOS 通知中心NotificationCenter

//发送
   NotificationCenter.default.post(name: NSNotification.Name(rawValue: "reloadmysymbol"), object: true)

//监听
NotificationCenter.default.addObserver(self, selector: #selector(reload), name: NSNotification.Name(rawValue: "reloadmysymbol"), object: nil)

//移除
 NotificationCenter.default.removeObserver(self)