在没有推送通知的情况下更新 iOS 徽章 [英] Updating iOS badge without push notifications

问题描述

我看到一些待办事项应用程序会在午夜更新其应用程序徽章，始终显示正确的到期任务数.他们在不使用推送通知的情况下做到这一点 - 所以我的问题是:他们是如何做到这一点的?他们是否使用本地通知——如果是这样，当设备关闭时这些通知会被调用吗?我有点困惑，希望能提供一些意见.

I have seen a few todo apps that update their app badges at midnight, always showing the correct number of due tasks. They do this without the use of Push Notifications - so my question is: how do they do this? Do they use local notifications - if so, do these get called when the device is turned off? I'm a little confused and would appreciate some input.

推荐答案

试试这个

[[UIApplication sharedApplication] setApplicationIconBadgeNumber:1];

要通过本地通知执行此操作，您必须在 applicationIconBadgeNumber 中设置值

To do this through local notifications you have to set the value in applicationIconBadgeNumber

UILocalNotification *localNotification = [[UILocalNotification alloc] init];
localNotification.applicationIconBadgeNumber = 1;// set here the value of badge

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