Background reminder number (number on application ApplicationIcon)

@property (nonatomic) Nsinteger applicationiconbadgenumber; Set to 0 to hide. Default is 0. in IOS 8.0 and later, your application must register for user notifications using-[uiapplication Registerusernotifica Tionsettings:] Before being able to set the icon badge.

After discovering 8.0, first write-[uiapplication registerusernotificationsettings:] This method

So:

[[UIApplication sharedapplication] registerusernotificationsettings:[uiusernotificationsettings settingsForTypes: Uiusernotificationtypebadge Categories:nil]];

[UIApplication sharedapplication].applicationiconbadgenumber = [responseobject[@ "status"] intvalue];

The application enters the background by default in hibernation, so that the number of unread messages cannot be read in time.

Opening a task in the background keeps the program running at all times: (the time to keep running is indeterminate,

Background reminder number (number on application ApplicationIcon)