更新iOS中10

Question

待處理通知我有下面這個函數：

@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) 
     } 
    }) 
} 

我試圖減小對所有懸而未決的通知徽章號碼。這可能嗎？ notification.content.badge是隻讀的，我無法找出設置它的方法。

Answer 1

您可能需要做的是取消您想要更改的通知，然後使用新的徽章號碼安排新通知。您可以通過從該陣列中的每個通知中獲取UNNotificationRequest標識符，然後調用
center.removePendingNotificationRequests(withIdentifiers: [request, identifiers, of, notifications, to, remove])
然後計劃更新的通知。
爲UNNotificationRequest.identifier文檔不說

如果您安排新通知時使用相同的標識，系統中刪除以前調度的通知，該標識符，並與新的替換它。

所以你不應該有先刪除它們，但這取決於你。

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) 
    } 

}