The Notificationcenter of Swift learning

1, release new notice:

NotificationCenter.default.post (Name:  nsnotification.name (rawValue: "Messagemaincount"), Object:nil, UserInfo : ["Count": "\ (count)"])

2, accept the new notice

NotificationCenter.default.addObserver (Self, selector: #selector (self.changebadgevalue (Notification:)), Name: Nsnotification.name (rawValue: "Messagemaincount"), Object:nil)

3. Set the listening method for receiving notifications

Func Changebadgevalue (notification:notification), Void {let                name = Notification.name let        userInfo = Notifi Cation.userinfo as! [String:any]        Let Userinfodic = UserInfo as nsdictionary                if name = = Nsnotification.name (rawValue: ' Messagemaincount ') {let             badgevalue:string = Userinfodic.object (forkey: "Count") as! String                       self.messageVC.parent?. Tabbaritem.badgevalue = Badgevalue        }}

4. Remove Notification Monitor

deinit{        NotificationCenter.default.removeObserver (self)}

The Notificationcenter of Swift learning