Apple 推送通知徽章编号
问题说明
我开发了服务器端应用程序，以在收到新通知后将徽章编号保持为递增或递减，并在看到通知后删除它工作正常.
I have developed server side application to maintain the badge number as increment or decrement after receiving new notification and delete after seeing notification it works fine.
但是在显示徽章时存在一些问题，实际情况是 - 在设备上收到新通知后，我点击取消按钮然后徽章号码显示正确，但之后我将打开应用程序并关闭应用程序徽章被移除.这意味着我不会向服务器发送我看到通知的请求，现在您可以将徽章减一.然后也从应用程序图标中删除了徽章.
But there is some problem in showing the badge, the actual scenario is - After getting new notification on device, I am click on cancel button then badge number shows correctly but after that I will open the application and close the application badge will be removed. That means I am not sending request to the server that notification was seen by me and now you can decrement the badge by one. Then also badge removed from app icon.
我的问题是，当我们打开应用程序时，徽章编号会自动从(应用程序)设备中删除?或者它会一直显示直到我们设置为零?
My question is that when we open the application then badge number automatically removed from (application) device? or it will shows as it is until we set to zero?
正确答案
它会一直显示，直到您将其设置为零为止，您可以使用以下代码进行操作:
It will show until you set it to zero and you can do it with the following code:
[[UIApplication sharedApplication] setApplicationIconBadgeNumber:0]
在收到通知时设置徽章编号更为常见，在 application:didReceiveRemoteNotification: 或 application:didFinishLaunchingWithOptions: 方法中 UIApplicationDelegate> 班级.
It is more common to set the badge number as you receive the notification, in either application:didReceiveRemoteNotification: or application:didFinishLaunchingWithOptions: methods of your UIApplicationDelegate class.
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