更新iOS中10

Question

待处理通知我有下面这个函数：

@objc func decrementBadges(){ 
    let center = UNUserNotificationCenter.current() 

    center.getPendingNotificationRequests(completionHandler: { (notifications) in 
     print("count", notifications.count) 
     for notification in notifications{ 
      //center.removePendingNotificationRequests(withIdentifiers: notification.title) 
      print(notification.content.badge) 
      print(notification.description) 
     } 
    }) 
} 

我试图减小对所有悬而未决的通知徽章号码。这可能吗？ notification.content.badge是只读的，我无法找出设置它的方法。

Answer 1

您可能需要做的是取消您想要更改的通知，然后使用新的徽章号码安排新通知。您可以通过从该阵列中的每个通知中获取UNNotificationRequest标识符，然后调用
center.removePendingNotificationRequests(withIdentifiers: [request, identifiers, of, notifications, to, remove])
然后计划更新的通知。
为UNNotificationRequest.identifier文档不说

如果您安排新通知时使用相同的标识，系统中删除以前调度的通知，该标识符，并与新的替换它。

所以你不应该有先删除它们，但这取决于你。

Answer 2

@objc func decrementBadges(eventId: String){ 
    let center = UNUserNotificationCenter.current() 

    var arrayOfNotifications: [UNNotificationRequest] = [] 

    center.getPendingNotificationRequests(completionHandler: { (notifications) in 
     print("notifications.count", notifications.count) 
     for notification in notifications{ 

      print(notification.description) 

      let content = UNMutableNotificationContent() 

      content.title = notification.content.title 
      content.subtitle = notification.content.subtitle 
      content.body = notification.content.body 
      content.sound = notification.content.sound 
      content.userInfo = notification.content.userInfo 
      content.categoryIdentifier = notification.content.categoryIdentifier 

      if notification.content.badge != nil { 
       var int : Int = Int(notification.content.badge!) 
       int -= 1 
       content.badge = NSNumber(value: int) 
      } 

      let infoDict = content.userInfo as NSDictionary 

      let notificationId:String = infoDict.object(forKey: "IDkey") as! String 

      if notificationId != eventId { 
       let request = UNNotificationRequest(
        identifier: notification.identifier, 
        content: content, 
        trigger: notification.trigger 
       ) 

       arrayOfNotifications.append(request) 
      } 


     } 
    }) 

    self.clearNotifications() 

    for notification in arrayOfNotifications { 

     UNUserNotificationCenter.current().add(
      notification, withCompletionHandler: nil) 
    } 

}