小编dem*_*eph的帖子

由于我的小部件的大小或数据（我猜），我收到多个错误。\n我尝试重新编写这部分，但它不起作用。\n是因为小部件的大小还是其他原因？

 @override\n Widget build(BuildContext context) {\n   var questionsOf = widget.setType(InputPage.topicN);\n\n   CollectionReference contestantsRef =\n       FirebaseFirestore.instance.collection(\'contestants\');\n\n   return Scaffold(\n     backgroundColor: Colors.blue,\n     appBar: AppBar(\n       centerTitle: true,\n     ),\n     body: SafeArea(\n         child: Column(\n       children: <Widget>[\n         Flexible(\n             child: Container(\n           height: 100,\n           child: iconCreate(),\n         )),\n         Container(\n           child: StreamBuilder<QuerySnapshot>(\n             stream: contestantsRef.snapshots(),\n             builder: (BuildContext context, AsyncSnapshot asyncSnapshot) {\n               List<DocumentSnapshot> listOfDocumentSnap =\n                   asyncSnapshot.data.docs;\n\n               return ListView.builder(\n                 itemBuilder: (context, index) {\n                   return Text(\'${listOfDocumentSnap[index].data()}\');\n                 },\n                 itemCount: listOfDocumentSnap.length,\n               );\n             },\n           ),\n         ),\n         SizedBox(\n           height: 100,\n         ),\n         Flexible(\n           flex: 4,\n           child: Container(\n             height: 200,\n             margin: …