How to get timestamp of pushnotification in Swift?

Question

I am trying to get pushnotification data. I am able to get title and body but i am also trying to get timestamp.

I am getting data like

   func userNotificationCenter(_ center: UNUserNotificationCenter,
                                didReceive response: UNNotificationResponse,
                                withCompletionHandler completionHandler: @escaping () -> Void) {
        let userInfo = response.notification.request.content.userInfo
        // Print full message.

        guard
            let aps = userInfo[AnyHashable("aps")] as? NSDictionary,
            let alert = aps["alert"] as? NSDictionary,
            let body = alert["body"] as? String,
            let title = alert["title"] as? String
            else {
                // handle any error here
                return
            }

        print("Title: \(title) \nBody:\(body)")

        completionHandler()
    }

is there any way to get timestamp in pushnotification payload itself or via any other way?

Answer 1

You should add custom timestamp data into your Push Notification's payload.

Normally the payload looks like this;

{
    "aps":{
        "alert":{
            "title":"Hello",
            "body":"How are you?"
        },
        "badge":0,
        "sound":"default"
    }
}

---

If you want to add custom fields into the payload it should be look like ->

{
    "aps":{
        "alert":{
            "title":"Hello",
            "body":"How are you?"
        },
        "badge":0,
        "sound":"default"
    },
    "timestamp": "1590736069"
}

The custom fields are has to locate outside to aps object.

Please check this out -> Apple Documentation

---

Then you need to parse it

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

    let userInfo = response.notification.request.content.userInfo
    // Print full message.

    guard
        let aps = userInfo["aps"] as? NSDictionary,
        let alert = aps["alert"] as? NSDictionary,
        let body = alert["body"] as? String,
        let title = alert["title"] as? String,
        let timestamp = userInfo["timestamp"] as? String
            else {
                // handle any error here
                return
            }

    print("Title: \(title) \nBody:\(body)")
    print("Timestamp is: \(timestamp)")
    completionHandler()
}

Note: Don't need to use AnyHashable to use string as a key. Use like userInfo["aps"]

---

Getting current date's timestamp

If you need to know notification received date you can simply get current Date's timestamp value like this ->

// Declare this in `didReceive` method and now you know the timestamp of notification received date
let timestamp = Date().timeIntervalSince1970