Firebase 如何获取文档数据并在屏幕上进行设置

我试图从firebase对象（如名称）获取某些信息，但构建不会等待未来，也不会在事后更改它

我尝试了使用Future和Stream（我假设Stream的效率较低，但我对Flitter非常陌生）

我有这个函数来获取我想要的文档（是的，设置了propertyId！）

然后，我尝试将其更改为一个流，在该流中，我只需在构建中调用此函数：

void _createPropertyInfoState() {
    StreamBuilder(
        stream: Firestore.instance.collection('properties').snapshots(),
        builder: (context, snapshot) {
          if (!snapshot.hasData) {
            propertyNameController = TextEditingController();
            streetNameController = TextEditingController();
            boughtOnController = TextEditingController();
          } else {
            propertyNameController = TextEditingController(
                text: snapshot.data.document[widget.propertyId]
                    ['propertyName']);
            streetNameController = TextEditingController(
                text: snapshot.data.document[widget.propertyId]['address']);
            boughtOnController = TextEditingController(
                text: snapshot.data.document[widget.propertyId]['boughtOn']);
          }
          return null;
        });
  }

我只想设定那些精确的值

FutureBuilder(
        future: _createPropertyInfoState(),
        builder: (context, snapshot) {
          if (snapshot.hasData) {
            propertyNameController = TextEditingController(text: snapshot.data['propertyName']);
            streetNameController = TextEditingController(text: snapshot.data['address']);
            boughtOnController = TextEditingController(text: snapshot.data['boughtOn']);
          } else {
            propertyNameController = TextEditingController();
            streetNameController = TextEditingController();
            boughtOnController = TextEditingController();
          }
          return null;
        });

void _createPropertyInfoState() {
    StreamBuilder(
        stream: Firestore.instance.collection('properties').snapshots(),
        builder: (context, snapshot) {
          if (!snapshot.hasData) {
            propertyNameController = TextEditingController();
            streetNameController = TextEditingController();
            boughtOnController = TextEditingController();
          } else {
            propertyNameController = TextEditingController(
                text: snapshot.data.document[widget.propertyId]
                    ['propertyName']);
            streetNameController = TextEditingController(
                text: snapshot.data.document[widget.propertyId]['address']);
            boughtOnController = TextEditingController(
                text: snapshot.data.document[widget.propertyId]['boughtOn']);
          }
          return null;
        });
  }