我正在使用UNUserNotificationCenter来发送通知,如下所示：
UNUserNotificationCenter.current().getDeliveredNotifications { (notifications) in
self.array = notifications
}
然后在viewWillDisappear上我清除applicationIconBadgeNumber,如下所示：
override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
UIApplication.shared.applicationIconBadgeNumber = 0
}
这样做不会让我的通知持续很长时间,是的,我希望看到通知后徽章编号为0,但我希望这些会持续24到48小时….我怎么能做到这一点？
获取通知的日期属性,并仅清除过去24小时内触发的通知.使用此功能：
func updateAppIcon() {
UNUserNotificationCenter.current().getDeliveredNotifications { (notifications) in
let past24hNotifications = notifications
.filter { $0.date > Date().addingTimeInterval(-24 * 60 * 60)}
DispatchQueue.main.async {
UIApplication.shared.applicationIconBadgeNumber = past24hNotifications.count
}
}
}
并在AppDelegate的applicationWillResignActive(_ application :)中调用它
