iPhone：推送通知后如何删除徽章？

Question

What is the code to remove the badge on my app's icon? When I receive push, I need to remove it when a button is clicked!

Answer 1

objC :

[UIApplication sharedApplication].applicationIconBadgeNumber = 0;

swift :

UIApplication.sharedApplication().applicationIconBadgeNumber = 0;

Answer 2

You can remove badge from push notifications by adding the following lines to your code

(void)applicationDidBecomeActive:(UIApplication *)application
{
    [[UIApplication sharedApplication] cancelAllLocalNotifications];
    [UIApplication sharedApplication].applicationIconBadgeNumber = 0;
}

Answer 3

As for iOS5, just setting badge number won't remove those push notification in the notification center. You have to do this...

[[UIApplication sharedApplication] cancelAllLocalNotifications];
[UIApplication sharedApplication].applicationIconBadgeNumber = 0;

I already tested this. It looks like cancelAllLocalNotifications method also works with push notifications in notification center as well.

Answer 4

Swift 3

UIApplication.shared.applicationIconBadgeNumber = 0

Can be added to following methods:

optional public func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplicationLaunchOptionsKey : Any]? = nil) -> Bool

and

optional public func applicationDidBecomeActive(_ application: UIApplication)