在颤动、省道中将Map<String、Object>转换为List<Widget>

Question

我在flutter中使用了graphql-flutter，我想我的查询结果是LazaCaheMap，也就是地图。你可以看看here

然后我需要将该地图用于GridView。我的代码如下所示。

        List playlists = result.data['playlists'];

        return GridView.count(
          crossAxisCount: 2,
          mainAxisSpacing: 8,
          crossAxisSpacing: 8,
          padding: const EdgeInsets.all(8),
          childAspectRatio: 1,
          children: newPlaylist.map<Widget>((playlist) {
            return ChannelCard(
              playlistId: playlist['playlistId'],
              playlistTitle: playlist['playlistTitle'],
              thumbnailUrl: playlist['thumbnailUrl'],
              description: playlist['description'],
            );
          }),
        );

但正如我所料，我得到了type 'MappedListIterable<Object, Widget>' is not a subtype of type 'List<Widget>'错误。如何转换此类型？

Answer 1

有一个toList()方法用于将Iterable转换为List。

somelist.map((f)=>{}).toList();