Question

我正在尝试使用UILocalNotification清除我应用的“未读”徽章。逻辑上你会认为这可以通过将applicationIconBadgeNumber实例的UILocalNotification设置为0来完成。但它不起作用，而applicationIconBadgeNumber的文档说“默认值为0，这意味着”否发生变化。“>

一旦设置了徽章，真的没有办法清除带有本地通知的徽章吗？

更新：一些简单的代码：

-(void)applicationDidFinishLaunching
{
    // Set the appication icon badge to 1 in 10 minutes, using a local notification so it works in the background:
    // This works fine.

    UILocalNotification *episodeNotification = [[UILocalNotification alloc] init];
    episodeNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:(60 * 10)];
    episodeNotification.timeZone = [NSTimeZone defaultTimeZone];
    episodeNotification.applicationIconBadgeNumber = 1;

    [[UIApplication sharedApplication] scheduleLocalNotification:episodeNotification];
    [episodeNotification release];


    // Clear the application icon badge in 20 minutes, again using a local notifcation so it works in the background:
    // This doesn't work.  According to the docs for local notification it's not supposed to
    // because (applicationIconBadgeNumber = 0) means "Do not change the badge"
    // I'm looking for an alternative if it exists.

    UILocalNotification *clearEpisodeNotification = [[UILocalNotification alloc] init];
    clearEpisodeNotification.fireDate = [NSDate dateWithTimeIntervalSinceNow:(60 * 20)];
    clearEpisodeNotification.timeZone = [NSTimeZone defaultTimeZone];
    clearEpisodeNotification.applicationIconBadgeNumber = 0;

    [[UIApplication sharedApplication] scheduleLocalNotification:clearEpisodeNotification];
    [clearEpisodeNotification release];
}

Answer 1

我遇到了同样的问题。从本地通知设置徽章时，将其设置为0是“无更改”的默认设置，而直接从应用程序执行此操作将清除它。通过本地通知将其设置为负数解决了问题。

尝试：

clearEpisodeNotification.applicationIconBadgeNumber = -1;

Answer 2

是的，可以从应用程序本身清除徽章。

我在我的某个应用中使用了以下代码，它按预期工作（即清除徽章）：

//clear app badge
[UIApplication sharedApplication].applicationIconBadgeNumber=0;

使用本地通知清除应用徽章

2 个答案: