快速解析推送通知数据

Question

我收到了推送通知，它们在 iPhone 上显示得非常好。但由于某种原因，我想解析我在 didReceivedRemoteNotification 方法中收到的以下结果以进行推送通知。

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


    print("FFTF", "didReceiveRemoteNotification", userInfo)
  }

以下是我打印 userInfo 时得到的结果

    [AnyHashable("FcmNotificationStatus"): 3, AnyHashable("ListItemIds"): ["42D890C4-0804-4434-B137-0EECDEFEC319"], AnyHashable("UserId"): 15, AnyHashable("gcm.message_id"): 1582109***6, AnyHashable("Title"): MY App, AnyHashable("body"): Welcome., AnyHashable("aps"): {
    "content-available" = 1;
}, AnyHashable("google.c.sender.id"): 589****85]

这是我收到的回复，我想从中获得以下具有特定类型的字段

• 内容可用（整数）
• FcmNotificationStatus (Int)
• ListItemIds（字符串数组）
• 用户 ID（整数）

我尝试了很多方法，但我的应用程序崩溃了。我可以做些什么来轻松解析它吗？请让我知道该怎么做。

Answer 1

你有一本字典。解析应该是相当直接的。

let status = userInfo["FcmNotificationStatus"] as? Int
let ids = userInfo["ListItemIds"] as? [Int]
let title = userInfo["Title"] as? String
let body = userInfo["body"] as? String

如果您不显示您的代码并解释您遇到的错误，我无法更详细地回答您为什么会收到这些错误

This guide 解释了一些概念。专家...

@available(iOS 10, *)

extension AppDelegate : UNUserNotificationCenterDelegate {

  // Receive displayed notifications for iOS 10 devices.
  func userNotificationCenter(_ center: UNUserNotificationCenter,
                              willPresent notification: UNNotification,
    withCompletionHandler completionHandler: @escaping (UNNotificationPresentationOptions) -> Void) {
    let userInfo = notification.request.content.userInfo

    // With swizzling disabled you must let Messaging know about the message, for Analytics
    // Messaging.messaging().appDidReceiveMessage(userInfo)

    // Print message ID.
    if let messageID = userInfo[gcmMessageIDKey] {
      print("Message ID: \(messageID)")
    }

    // Print full message.
    print(userInfo)

    // Change this to your preferred presentation option
    completionHandler([])
  }

  func userNotificationCenter(_ center: UNUserNotificationCenter,
                              didReceive response: UNNotificationResponse,
                              withCompletionHandler completionHandler: @escaping () -> Void) {
    let userInfo = response.notification.request.content.userInfo
    // Print message ID.
    if let messageID = userInfo[gcmMessageIDKey] {
      print("Message ID: \(messageID)")
    }

    // Print full message.
    print(userInfo)

    completionHandler()
  }
}

您不会总是在 didReceiveRemoteNotification 中收到通知，您应该使用链接文章中提到的委托方法。