flutter问题 rendercustommultichildlayoutbox object was given an infinite size during layout.

Widget (BuildContext context) {
  var content = null;
  if (listData.isEmpty) {
    content = CircularProgressIndicator(
      backgroundColor: Colors.green,
    );
  } else {
    content =
    new Container(
      child: ListView.builder(
        itemCount: listData.length,
        
        itemBuilder: (context, index) {
          return getItemWidget(index);
        },
      ),
    );
  }

  return new Scaffold(
    body: new Center(
      child: content,
    ),
  );
}

Widget (BuildContext context) {
  return Scaffold(
    body: Text('数据'),
  );
}

Widget (BuildContext context) {
  return new Container(
    child: Text('数据'),
  );
}