is there have a concurrent List in flutter-CodePudding

When I add some elements in HashMap in flutter like this:

void loadingMoreChannel(RefreshController _refreshController) async {
    articleRequest.pageNum = articleRequest.pageNum   1;
    List<Channel> channels = await Repo.getChannels(articleRequest);
    channels.addAll(channels);
    _refreshController.loadComplete();
  }

first step fetched some channel information from the server side, then add the channel info into List, shows error:

Concurrent modification during iteration: Instance(length:15) of '_GrowableList'.<…>

what should I do to add the channel elements into list concurrent?

CodePudding user response：

Seems you need to rename the variable. You can just do

void loadingMoreChannel(RefreshController _refreshController) async {
    articleRequest.pageNum = articleRequest.pageNum   1;
    List<Channel> result = await Repo.getChannels(articleRequest);
    channels.addAll(result); //it was having same name
    _refreshController.loadComplete();
  }