updateGroupAnnouncement method
更新群公告
Implementation
Future<EMGroup> updateGroupAnnouncement(
String groupId,
String announcement,
) async {
Map req = {'groupId': groupId, 'announcement': announcement};
Map result =
await _channel.invokeMethod(EMSDKMethod.updateGroupAnnouncement, req);
EMError.hasErrorFromResult(result);
return EMGroup.fromJson(result[EMSDKMethod.updateGroupAnnouncement]);
}