downloadAttachment method

Future<NIMResult<void>> downloadAttachment(
  1. QChatDownloadAttachmentParam param
)

默认情况下（SDKOPtions#preloadAttach为true），SDK收到多媒体消息后，图片和视频会自动下载缩略图，音频会自动下载文件。 如果下载原图或者原视频等，可调用该接口下载附件

Implementation

Future<NIMResult<void>> downloadAttachment(
    QChatDownloadAttachmentParam param) {
  return _platform.downloadAttachment(param);
}