转发消息

IMKit 目前不支持对单条或多条消息的转发，也不支持合并转发，下面提供了可以实现单条或多条消息的转发的代码示例进行参考。

单条转发

可以增加消息气泡的长按事件 自定义来实现转发。在 onClick 中发消息使用 示例代码 的 sendForwardMessage 方法。

let msgForwardLongClickAction :ItemLongClickAction<Message> = {
  obtainTitle: (context: Context, data: Message): string | Resource => {
    return "转发消息"
  },
  onClick: (context: Context, data: Message): void => {
    // 转发消息 
  },
  onFilter: (data: Message): boolean => {
    // 是否显示该长按事件？true 显示；false 不显示
    // 开发者可以根据 Message 对象的会话类型或者消息类型决定是否显示
    return true;
  },
  // 自定义的消息长按事件 Id，相同的 Id 的长按事件只会增加一次
  actionId: 'CustomMessageActionId'
}
RongIM.getInstance().conversationService().addMessageItemLongClickAction(msgForwardLongClickAction);

多条逐条转发

IMKit 提供了 addMessageMoreAction 方法，可以增加长按消息点击“更多”之后，展示聊天页面底部的按钮 示例代码。

需要在 routeSelectPage 中编写跳转到 App 侧开发选人页面，发消息使用 示例代码 的 sendForwardMessages 方法。

  forwardDialog: CustomDialogController | undefined

  async aboutToAppear(): Promise<void> {
    this.addMessageMoreItems()
  }

  private addMessageMoreItems() {
    this.forwardDialog = new CustomDialogController({
      builder: CustomListDialog({
        itemTextAlign: TextAlign.Center,
        viewAllWidth: '95%',
        list: [$r("app.string.rc_combine_stepwise_forwarding"), $r("app.string.rc_cancel")],
        onItemClick: (index: number) => {
          if (index === 1) {
            // 关闭弹窗
            this.forwardDialog?.close();
          }
          if (index === 0) {
            // 关闭弹窗
            this.forwardDialog?.close();
            // 跳转到 App 侧开发选人页面
            let params: ForWardMessageParam = { messages: this.forwardMessageArray };
            this.routeSelectPage(params)
          }
        }
      }),
      customStyle: true,
      offset: { dx: 0, dy: -30 },
      alignment: DialogAlignment.Bottom
    })
    RongIM.getInstance().conversationService().addMessageMoreAction({
      actionId: 'message_more_forward',
      icon: $r("app.media.rc_message_more_forward"),
      onClick: (context: Context, messages: Message[]): boolean => {
        this.forwardMessageArray = messages
        this.forwardDialog?.open()
        return true
      },
      onFilter: (messages: Message[]): boolean => {
        return true;
      },
      location: 100
    })
  }
  
  private routeSelectPage(params: ForWardMessageParam) {
    // 跳转逻辑
  }

转发消息示例代码

import {
  ConversationIdentifier,
  ConversationType,
  FileMessage,
  FileMessageObjectName,
  GIFMessage,
  GIFMessageObjectName,
  ImageMessage,
  ImageMessageObjectName,
  HQVoiceMessageObjectName,
  Message,
  ObjectChecker,
  RongIM,
  TextMessage,
  SightMessage,
  TextMessageObjectName,
  SightMessageObjectName,
  LocationMessageObjectName,
  LocationMessage,
  HQVoiceMessage,
  RichContentMessageObjectName,
  RichContentMessage,
  ReferenceMessageObjectName,
  ReferenceMessage,
  MessageContent
} from '@rongcloud/imkit';

  // 转发多条消息
  private async sendForwardMessages(forwardMessage: Message[]) {
    for (let index = 0; index < forwardMessage.length; index++) {
      this.sendForwardMessage(forwardMessage[index], index == forwardMessage.length - 1);
      await new Promise<void>(resolve => setTimeout(resolve, 300));
    }
  }

  // 转发单条消息
  private async sendForwardMessage(forwardMessage: Message): Promise<void> {
    return new Promise(async () => {
      let conversationIdentifier = new ConversationIdentifier();
      conversationIdentifier.conversationType = forwardMessage.conversationType;
      conversationIdentifier.targetId = forwardMessage.targetId;
      let msgContent = this.getMessageContent(forwardMessage.content, forwardMessage.objectName);
      if (!msgContent) {
        return
      }
      let msg = new Message(conversationIdentifier, msgContent);
      await RongIM.getInstance().messageService().sendMessage(msg)
    })
  }

  private getMessageContent(messageContent: MessageContent, objName: string): MessageContent | undefined {
    if (objName === TextMessageObjectName) {
      let oldTextMsg = messageContent as TextMessage
      let textMsg = new TextMessage();
      textMsg.content = oldTextMsg.content;
      return textMsg
    } else if (objName === ImageMessageObjectName) {
      let imageMsg = messageContent as ImageMessage
      let imageMessage = new ImageMessage();
      imageMessage.isFull = true;
      imageMessage.name = imageMsg.name;
      imageMessage.remoteUrl = imageMsg.remoteUrl;
      imageMessage.thumbnailBase64 = imageMsg.thumbnailBase64;
      return imageMessage
    } else if (objName === FileMessageObjectName) {
      let fileMsg = messageContent as FileMessage;
      let fileMessage = new FileMessage();
      fileMessage.name = fileMsg.name;
      fileMessage.remoteUrl = fileMsg.remoteUrl;
      fileMessage.size = fileMsg.size;
      fileMessage.type = fileMsg.type;
      return fileMessage
    } else if (objName === GIFMessageObjectName) {
      let imageMsg = messageContent as GIFMessage
      let imageMessage = new GIFMessage();
      imageMessage.name = imageMsg.name;
      imageMessage.remoteUrl = imageMsg.remoteUrl;
      return imageMessage
    } else if (objName === SightMessageObjectName) {
      let sightMsg = messageContent as SightMessage
      let sightMessage = new SightMessage();
      sightMessage.base64 = sightMsg.base64;
      sightMessage.duration = sightMsg.duration;
      sightMessage.size = sightMsg.size;
      sightMessage.name = sightMsg.name;
      sightMessage.remoteUrl = sightMsg.remoteUrl;
      return sightMessage
    } else if (objName === RichContentMessageObjectName) {
      let richContentMsg = messageContent as RichContentMessage
      let richContentMessage = new RichContentMessage();
      richContentMessage.title = richContentMsg.title
      richContentMessage.content = richContentMsg.content
      richContentMessage.imgUrl = richContentMsg.imgUrl
      richContentMessage.url = richContentMsg.url
      return richContentMessage
    } else if (objName === LocationMessageObjectName) {
      let locationMsg = messageContent as LocationMessage
      let locationMessage = new LocationMessage();
      locationMessage.latitude = locationMsg.latitude;
      locationMessage.longitude = locationMsg.longitude;
      locationMessage.poi = locationMsg.poi;
      locationMessage.thumbnailBase64 = locationMsg.thumbnailBase64;
      locationMessage.type = locationMsg.type;
      return locationMessage
    } else if (objName === HQVoiceMessageObjectName) {
      let hqVoiceMsg = messageContent as HQVoiceMessage
      let hqVoiceMessage = new HQVoiceMessage();
      hqVoiceMessage.name = hqVoiceMsg.name;
      hqVoiceMessage.remoteUrl = hqVoiceMsg.remoteUrl;
      hqVoiceMessage.duration = hqVoiceMsg.duration;
      return hqVoiceMessage
    }
    return undefined
  }