收到推送通知時如何更新徽章編號

Question

我需要完成這部分代碼的幫助，因此當收到推送通知時，應用程序將顯示徽章編號，我可以收到推送通知，但應用程序上沒有徽章，這是代碼

 func application(_ application: UIApplication, didReceiveRemoteNotification userInfo: [AnyHashable : Any],
 fetchCompletionHandler completionHandler: @escaping
 (UIBackgroundFetchResult) -> Void) {

if let aps = userInfo["aps"] as? NSDictionary, let _ = aps["alert"] as?   String, let sound = aps["sound"] as? String
         {

             if let systemSound = SystemSoundID(sound) {
             AudioServicesPlayAlertSound(systemSound)
         }

         NotificationCenter.default.post(name: Notification.Name(rawValue: SystemSetting.refreshCouponListNotification), object: nil)

         completionHandler(UIBackgroundFetchResult.newData)
     }
 }

Answer 1

有兩種方法用於推送通知

1. 前景法
2. 背景方法

1，前景法

    func userNotificationCenter(_ center: UNUserNotificationCenter, 
               willPresent notification: UNNotification,withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void)

獲取通知請求的內容

let content = notification.request.content

2.背景方法

func userNotificationCenter(_ center: UNUserNotificationCenter, 
                    didReceive response: UNNotificationResponse, 
withCompletionHandler completionHandler: @escaping () -> Void)

獲取通知請求的內容

let content = response.notification.request.content

獲取徽章計數

let badge = content.badge as! Int

Answer 2

請按照以下步驟在iOS中設置徽章計數：

1.實現邏輯來計算后端的計數並通過Push通知發送該計數，例如：

{ "aps" : { "alert" : "You got your Push Message.", "badge" : 9 } }

2.從推送通知響應中獲取徽章計數：

let pushContent = response.notification.request.content
let badgeCount = content.badge as! Int

3.在didReceiveRemoteNotification方法中設置徽章計數：

UIApplication.sharedApplication().applicationIconBadgeNumber = badgeCount