Update a message

The Chat SDK supports modifying the content of all storable message types, including text, image, GIF, voice, video, reference, file, and custom messages.

Modify a message

In Swift, call BaseChannel.modifyMessage(params:completion:) to update message content. The Objective-C selector is shown in the secondary tab.

Swift

swift

import NexconnChatSDK

guard let messageContent = message.content as? TextMessage else {
    return
}

messageContent.text = "Updated text"

let params = ModifyMessageParams(
    messageId: message.messageId,
    content: messageContent
)

BaseChannel.modifyMessage(params: params) { updatedMessage, error in
    guard let updatedMessage, error == nil else {
        print("Failed to modify message: \(error?.localizedDescription ?? "unknown error")")
        return
    }

    print("Modified message: \(updatedMessage.messageId)")
}

Objective-C

Objective C

NCTextMessage *messageContent = (NCTextMessage *)message.content;
messageContent.text = @"Updated text";

NCModifyMessageParams *params = [[NCModifyMessageParams alloc]
    initWithMessageId:message.messageId
              content:messageContent];

[NCBaseChannel modifyMessageWithParams:params completion:^(NCMessage * _Nullable updatedMessage, NCError * _Nullable error) {
    if (error == nil) {
        NSLog(@"Modified message: %@", updatedMessage.messageId);
    }
}];

Property	Type	Description
messageId	NSString	Server message ID (message.messageId)
content	NCMessageContent	Updated message content

Listen for modifications

Other devices and users receive modification callbacks via MessageHandler:

Swift

swift

import NexconnChatSDK

final class MessageEditHandler: NSObject, MessageHandler {
    func start() {
        NCEngine.addMessageHandler(identifier: "MyHandler", handler: self)
    }

    func onMessagesModified(_ event: MessagesModifiedEvent) {
        print("Modified messages: \(event.messages.count)")
    }

    func onModifiedMessageSyncCompleted(_ event: ModifiedMessageSyncCompletedEvent) {
        print("Modified message sync completed.")
    }
}

Objective-C

Objective C

[NCEngine addMessageHandlerWithIdentifier:@"MyHandler" handler:self];

- (void)onMessagesModified:(NCMessagesModifiedEvent *)event {
    // event.messages: the modified messages
}

- (void)onModifiedMessageSyncCompleted:(NCModifiedMessageSyncCompletedEvent *)event {
    // Sync of modified messages completed after reconnection
}