Mark messages as delivered

Delivery receipt can be used to see whether a message has been successfully delivered to all intended recipients by the Sendbird server. To mark messages as delivered when a group channel member successfully receives a push notification for the message from APNs, the markAsDelivered(remoteNotificationPayload:completionHandler:) method should be implemented in Notification Service Extension.

Swift

import SendbirdChatSDK

class NotificationService: UNNotificationServiceExtension {

    var contentHandler: ((UNNotificationContent) -> Void)?
    var bestAttemptContent: UNMutableNotificationContent?

    override func didReceive(_ request: UNNotificationRequest, withContentHandler contentHandler: @escaping (UNNotificationContent) -> Void) {
        self.contentHandler = contentHandler
        bestAttemptContent = (request.content.mutableCopy() as? UNMutableNotificationContent)

        if let bestAttemptContent = bestAttemptContent {
            // Modify the notification content here.
            bestAttemptContent.title = "\(bestAttemptContent.title) [modified]"

            SendbirdChat.markAsDelivered(remoteNotificationPayload: bestAttemptContent.userInfo) { error in
                guard error == nil else {
                    // Handle error.
                    return
                }
            }

            contentHandler(bestAttemptContent)
        }
    }

}

Receive an update event for delivery receipts

When a message is delivered to a group channel member who is online, it is automatically marked as delivered and other members who are online are also notified of the delivery receipt through the channelDidUpdateDeliveryStatus(_:) method of GroupChannelDelegate.

However, when a message is delivered to an offline member as a push notification, the message can be marked as delivered through the markAsDelivered(remoteNotificationPayload:completionHandler:) method of SendbirdChat, and other members who are online are notified of the successful message delivery through the channelDidUpdateDeliveryStatus(_:) method.

Swift

class GroupChannelChattingViewController: UIViewController, GroupChannelDelegate {
    func initViewController() {
        SendbirdChat.add(self as GroupChannelDelegate, identifier: UNIQUE_DELEGATE_ID)
    }

    func channelDidUpdateDeliveryStatus(_ channel: GroupChannel) {

    }
}

Get delivery status of a message

To get the delivery status of messages in a group channel, use the getDeliveryStatus(with:) method. The method returns a list of objects with the user ID as the key and the delivery status as the value. The delivery status object contains the timestamp of the last delivered message.

Swift

// If with is set to false, the result won't include the current user.
let membersDeliveryStatus = groupChannel.getDeliveryStatus(with: false)
membersDeliveryStatus.forEach { userId, deliveryStatus in
    // Handle the delivery status of each member.
}

On this page

Receive an update event for delivery receipts Get delivery status of a message

Sample app