Ios push notification singlecast

iOS
1

Hello, Backendless!

I want to send a push notification along with a message from my iOS app to the iOS app of a specific user who is supposed to receive this message (the devices are registered in the DeviceRegistration table).

I don’t know the registered deviceId of the user who should receive the message (and in my opinion, I shouldn’t have to). I only know the user’s id, and I believe that should be enough.

Importantly, push notifications are set up and working fine, but only from the Console. There are
templates for all devices and for a specific segment (user.objectId = ‘userIdhere’), and both works correctly from Console.

Now I’m trying to send a message + push (messaging works fine). Here is my swift code:

func publish(
             toUserId: String,
             message: MessageServerModel
) async throws -> String {
    return try await withCheckedThrowingContinuation { continuation in
        
        let publishOptions = PublishOptions()
        publishOptions.addHeader(name: "ios-alert-title", value: "Message")
        publishOptions.addHeader(name: "ios-alert-body", value: message.message ?? "")
        
        let deliveryOptions = DeliveryOptions()
        deliveryOptions.segmentQuery = "user.objectId = '\(toUserId)'"

// deliveryOptions.pushSinglecast = [deviceId] /// I try to hardcode deviceId - not working too, although I don’t like this approach.

        Backendless.shared.messaging.publish(
            channelName: AppSettings.messagingChanel,
            message: message,
            publishOptions: publishOptions,
            deliveryOptions: deliveryOptions,
            responseHandler: { messageStatus in
                guard let validStatus = messageStatus.status else { return }
                continuation.resume(with: .success(validStatus))
            }, errorHandler: { fault in
                print("Error: \(fault.message ?? "")")
                continuation.resume(throwing: AppError(.backendless))
            })
    }
}

What am I missing?

P.S. I also want to point out that the iOS documentation for push notifications is broken and redirects to the main page.

2

Hi @Dmitry_Kalenkov ,

If you want to send push notification using query you need to use push templates instead.
With simple push messages query is not supported.

Regarding documentation.
Sorry for inconvenience. I have created a ticket for this moment.
As a temporal solution you can use REST API Documentation.

Regards, Andriy

3

Hi, @Andriy_Konoz , thanks for your reply! I’ve tried to use push templates and now it works great!

If someone in the future wants to send push notifications from the iOS client to a specific user (e.g., during a chat exchange like in my case), they will need to:

  1. Set up all the necessary certificates – the documentation provides detailed instructions.
  2. Register the device (a record should appear in the DeviceRegistration table).
  3. Create a push notification template with the segment user.objectId = ‘{toUserId}’.
  4. Use the push notification API for templates (you can attach parameters, and the template will process them if they are enclosed in curly brackets {}).

Swift:

func sendPushNotification(fromUser: String, toUserId: String, message: String) {
        let templateName = "PushToUserId"
        let templateValues: [String: Any] = [
            "toUserId": toUserId,
            "fromUser": fromUser,
            "message": message
        ]
        Backendless.shared.messaging.pushWithTemplate(
            templateName: templateName,
            templateValues: templateValues,
            responseHandler: { messageStatus in
                print("==== Push sent with status: \(messageStatus.status ?? "")")
            }, errorHandler: { fault in
                print("==== Error sending push: \(fault.message ?? "")")
            }
        )
    }
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