1.扩展通知的名字方便使用
//通知名字扩展
extension Notification.Name {
//更新视图
static let MyNotificationUpdateViewController = Notification.Name(rawValue:"updateViewController")
}
2.注册通知/移除通知
//创建通知中心,设置监听的方法
NotificationCenter.default.addObserver(self, selector: #selector(updateViewController), name:NSNotification.Name.MyNotificationUpdateViewController, object: nil)
//出现内存警告时
override func didReceiveMemoryWarning() {
//移除通知
NotificationCenter.default.removeObserver(self)
}
3.发送通知
//不带参数
NotificationCenter.default.post(name:NSNotification.Name.MyNotificationUpdateViewController, object:nil)
//带参数
NotificationCenter.default.post(name: NSNotification.Name.MyNotificationUpdateViewController, object: nil, userInfo: ["post":"NewTest"])