Notification

所有要用到推播的檔案，都要import UserNotifications

• 獲得使用者的允許

  • 在AppDelegate內的didFinishLaunchingWithOptions新增

    UNUserNotificationCenter.current().requestAuthorization(options: [.alert, .badge, .sound, .carPlay], completionHandler: { success, error in
        guard (error == nil) else {
            print("錯誤：\(error?.localizedDescription)")
            return 
        }
    
        guard success else {
            print("為什麼不同意")
            return
        }
        print("感謝大大的同意")
    })
    

• 發送Local Notification

  @IBAction func sendNotification(_ sender: AnyObject){
     // 設定傳送的資訊
     let content = UNMutableNotificationContent()
     content.title = "聽說這是主題"
     content.subtitle = "聽說這是副主題"
     content.body = "聽說這才是本體"
     content.badge = 1
     content.sound = UNNotificationSound.default()
  
     // 設定觸發條件->產生request->觸發
     let trigger = UNTimeIntervalNotificationTrigger(timeInterval: 5, repeats: false)
     let request = UNNotificationRequest(identifier: "notification", content: content, trigger: trigger)
     UNUserNotificationCenter.current().add(request, withCompletionHandler: nil)
  }
  

  • 觸發條件其實有這幾種
    • UNTimeIntervalNotificationTrigger：幾秒後觸發
    • UNCalendarNotificationTrigger：特定時間觸發
    • UNLocationNotificationTrigger：特定位置觸發
    • UNPushNotificationTrigger：從APNS觸發
  • 要取消request的方法
    • open func removePendingNotificationRequests(withIdentifiers identifiers: [String])
    • open func removeAllPendingNotificationRequests()
    • open func removeDeliveredNotifications(withIdentifiers identifiers: [String])
    • open func removeAllDeliveredNotifications()
  • 利用同一個request發送推播的話，若是使用者讓此request的推播留在通知中心，則可以不用再通知中心產生新推播，覆蓋先前request的推播內容

• 允許在App在前景時，收Notification

  • 先讓AppDelegate實作UNUserNotificationCenterDelegate的willPresent這個函式

    extension AppDelegate: UNUserNotificationCenterDelegate {
        func userNotificationCenter(_ center: UNUserNotificationCenter, willPresent notification: UNNotification, withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
            completionHandler([.carPlay, .badge, .sound, .alert])
        }
    }
    

  • 再讓didFinishLaunchingWithOptions代理

    UNUserNotificationCenter.current().delegate = self

• 傳送客製化資訊

  • 發送端利用content的userInfo變數（Dictionary類別）

    content.userInfo = ["action":"createMap"]

  • 收訊息端(AppDelegate)在userNotificationCenter(_:didReceive:withCompletionHandler:)內處理

    func userNotificationCenter(_ center: UNUserNotificationCenter, didReceive response: UNNotificationResponse, withCompletionHandler completionHandler:  @escaping () -> Void) {
    
        let content = response.notification.request.content
        print("userInfo \(content.userInfo)")
        completionHandler()
    }
    

• 替訊息客製化按鈕

  • 在AppDelegate的application(_:didFinishLaunchingWithOptions:)新增以下

    let okAction = UNNotificationAction(identifier: "ok", title: "Ok", options: [.foreground])
    let cancelAction = UNNotificationAction(identifier: "cancel", title: "Cancel", options: [])
    let category = UNNotificationCategory(identifier: "basic", actions: [okAction, cancelAction], intentIdentifiers: [], options: [])
    UNUserNotificationCenter.current().setNotificationCategories([category])
    

  • Action的options有下面四種

    • authenticationRequired：
    • destructive：
    • foreground：把App叫到前景來
    • []：關閉推播

  • 在發送端新增content的categoryIdentifier

    content.categoryIdentifier = "basic"

  • 所以可以利用很多Identifier創造很多組不同的按鈕，然後在發送訊息的時候設定content的categoryIdentifier為想要使用的Identifier即可

  Push Notification

  • AppCoda
  • DeviceToken的處理

  let tokenString = NSData(data: deviceToken).description.trimmingCharacters(in: .capitalizedLetters).replacingOccurrences(of: " ", with: "").replacingOccurrences(of: "<", with: "").replacingOccurrences(of: ">", with: "")