我正在尝试使用 UILocalNotification
清除我的应用程序的“未读”标记。从逻辑上讲,您会认为这可以通过将 UILocalNotification
实例的 applicationIconBadgeNumber
设置为 0 来完成。但它不起作用,applicationIconBadgeNumber 的文档说“默认值为0,表示“没有变化”。
那么一旦设置了带有本地通知的角标(Badge)真的没有办法清除吗?
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];
}
最佳答案
我遇到了同样的问题。从本地通知设置角标(Badge)时,将其设置为 0 是“无变化”的默认值,而直接从应用程序中设置会清除它。通过本地通知将其设置为负数解决了问题。
尝试:
clearEpisodeNotification.applicationIconBadgeNumber = -1;
关于iphone - 使用本地通知清除应用角标(Badge),我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/5375355/