撲兩個孩子：<Widget> 在同一個 Stack() 內

Question

如何在同一個Stack()融合兩個孩子<widget> > 例如，融合這個......

Stack(
   children: <Widget>[
    GoogleMap(
      initialCameraPosition:
      CameraPosition(target: LatLng(currentLocation.latitude,
          currentLocation.longitude), zoom: 17),
      onMapCreated: _onMapCreated,
      myLocationEnabled: true,
      mapType: _currentMapType,
      markers: Set<Marker>.of(markers.values),

    ),
    Padding(

有了這個：

    Stack(
      children: <Widget>[
        // Replace this container with your Map widget
        Container(
          color: Colors.black,
        ),
        Positioned(

Answer 1

將列表扁平化為列表的...運算符呢... 例如：

  List<Widget> getFirstStackChildren() {
    return [
      Text("first stack first child"),
      Text("first stack second child")
    ];
  }

  List<Widget> getSecondStackChildren() {
    return [
      Text("second stack first child"),
      Text("second stack second child")
    ];
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
          children: <Widget>[
            ...getFirstStackChildren(),
            ...getSecondStackChildren(),
          ],
        )
    );
  }