How can I use List of Scaffold in Scaffold body in Flutter?

Question

First of all, in my app when the user draws something and and then press save button, the user user should see the same drawing on his/her phone but on a shorter scale, because he/she can draw more drawings and save them, I wanted to show all of them in a singleChildScrollView. I have tried, but I am getting man errors. I want to show a grid of different screen on one screen so that whenever the user tap on one of the screens then the screen will expand fully on to the screen.

 Builder(
        builder: (context) => Column(
          children: [
            Expanded(
              child: Container(
                padding: EdgeInsets.all(0),
                height: height,
                color: Colors.white,
                child: SingleChildScrollView(
                  child: Form(
                    key: formKey,
                    child: Column(
                      children: <Widget>[
/////////////////////////////////////////////////////////////////////////////////////////////////////
//This below is the code that I tried.
                        widget.drawModel != null
                            ? Transform.scale(
                                scale: 0.5,
                                child: Scaffold(
                                  body: Container(
                                    constraints: BoxConstraints(
                                      maxHeight:
                                          MediaQuery.of(context).size.height /
                                              2,
                                      maxWidth:
                                          MediaQuery.of(context).size.width / 2,
                                    ),
                                    child: CustomPaint(
                                      painter: Draw(
                                          points: widget
                                              .drawModel[
                                                  widget.drawModel.length - 1]
                                              .points),
                                    ),
                                  ),
                                ),
                              )
                            : SizedBox(height: 10),
///////////////////////////////////////////////////////////////////////////////////////////////////
                        images.length != 0
                            // List view for images
                            ? Column(
                                children: <Widget>[
                                  for (int i = 0; i < images.length; i++)
                                    Padding(
                                      padding: EdgeInsets.symmetric(
                                          horizontal: ImageColumnPad * width),
                                      child: Dismissible(
                                        key: ObjectKey(images[i]),
                                        onDismissed: (direction) {
                                          var item = images.elementAt(i);
                                          deleteItem(i);
                                          Scaffold.of(context).showSnackBar(
                                            SnackBar(
                                              shape: RoundedRectangleBorder(),
                                              content: Text("Item deleted",
                                                  style:
                                                      TextStyle(fontSize: 15)),
                                              action: SnackBarAction(
                                                label: "UNDO",
                                                onPressed: () {
                                                  undoDeletion(i, item);
                                                },
                                              ),
                                            ),
                                          );
                                        },
                                        child: GestureDetector(
                                          onTap: () => {
                                            //TODO: Implement delete function here
                                          },
                                          child: Center(
                                            child: Image.file(
                                              images[i],
                                              fit: BoxFit.contain,
                                            ),
                                          ),
                                        ),
                                      ),
                                    ),
                                ],
                              )
                            : SizedBox(height: 2),
                       ...
...
...

Answer 1

You can wrap the body with Column.

@override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('First Route'),
      ),
      body: Scaffold(
        body: Center(
          child: RaisedButton(
            child: Text('Open route'),
            onPressed: () {},
          ),
        ),
      ),
    );
  }