Can apple push notifications send more parameters than alert and sound?

Question

I have several pieces of metadata that I need to associate with a push notification.

For example user no, message id.

Can I send more parameters than what ap

Answer 1

Here's how I send my custom key/values based on this tutorial

func sendPushNotification(to token: String, title: String, body: String, messageId: String, fromUsername: String, fromUID: String, timeStamp: Double) {

    let urlString = "https://fcm.googleapis.com/fcm/send"
    let url = NSURL(string: urlString)!

    // apple's k/v
    var apsDict = [String: Any]()
    apsDict.updateValue(title, forKey: "title")
    apsDict.updateValue(body, forKey: "body")
    apsDict.updateValue(1, forKey: "badge")
    apsDict.updateValue("default", forKey: "sound")

    // my custom k/v
    var myCustomDataDict = [String: Any]()
    myCustomDataDict.updateValue(messageId, forKey: "messageId")
    myCustomDataDict.updateValue(fromUsername, forKey: "username")
    myCustomDataDict.updateValue(fromUID, forKey: "uid")
    myCustomDataDict.updateValue(timeStamp, forKey: "timeStamp")

    // everything above to get posted
    var paramDict = [String: Any]()
    paramDict.updateValue(token, forKey: "to")
    paramDict.updateValue(apsDict, forKey: "notification")
    paramDict.updateValue(myCustomDataDict, forKey: "data")

    let request = NSMutableURLRequest(url: url as URL)
    request.httpMethod = "POST"
                                                     // ** add the paramDict here **
    request.httpBody = try? JSONSerialization.data(withJSONObject: paramDict, options: [.prettyPrinted])

    // send post ...
}

Here's how I read everything from the notification in AppDelegate. The method below is a delegate method in AppleDelegate. Use this tutorial for it

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

    let userInfo = response.notification.request.content.userInfo

    if let userInfo = userInfo as? [String: Any] {

        readPushNotification(userInfo: userInfo)
    }

    completionHandler()
}

func readPushNotification(userInfo: [String: Any]) {

    for (k,v) in userInfo {
        print(k)
        print(v)
    }

    // my custom k/v
    if let messageId = userInfo["messageId"] as? String {
        print(messageId)
    }

    if let fromUsername = userInfo["username"] as? String {
        print(fromUsername)
    }

    if let fromUID = userInfo["uid"] as? String {
        print(fromUID)
    }

    if let timeStamp = userInfo["timeStamp"] as? String {
        print(timeStamp)
    }

    // apple's k/v
    if let aps = userInfo["aps"] as? NSDictionary {

        if let alert = aps["alert"] as? [String: Any] {

            if let body = alert["body"] as? String {
                print(body)
            }

            if let title = alert["title"] as? String {
                print(title)
            }
        }

        if let badge = aps["badge"] as? Int {
            print(badge)
        }
    }
}