Flutter Web：底部溢出问题

Question

Code: Basically I have a simple app with three images aligned. I have 1 column and two rows. First row has two images and second row has 1 image aligned. Its the structure of the app. It just aligns perfectly when run below code in device but the moment I run on WEB there is this overflow. I try resizing the browser window only then it begins to become pretty again. Is there a workaround for Flutter Web please on how should I do the alignments here? Below code is inside body and inside Scaffold. I am attaching pics from device where there is no issue and from Flutter web where there is overflow issue.

return Column(
  mainAxisAlignment: MainAxisAlignment.center,
  //crossAxisAlignment: CrossAxisAlignment.stretch,
  children: <Widget>[
    Row(
      children: <Widget>[
        Expanded(
          child: FlatButton(
            child: Image.asset('images/image1.png'),
          ),
        ),
        Expanded(
          child: FlatButton(

            child: Image.asset('images/image1.png'),
          ),
        ),
      ],
    ),
    Row(
      children: <Widget>[
        Expanded(
          child: Image.asset('images/image1.png'),
        ),
      ],
    ),
  ],
);

}

Error:

══╡ EXCEPTION CAUGHT BY RENDERING LIBRARY ╞═════════════════════════════════════════════════════════ The following assertion was thrown during layout: A RenderFlex overflowed by 1238 pixels on the bottom.

The relevant error-causing widget was: Column file:///C:/Users/1025632/Documents/GitHub/flutter-course/diceylips/lib/main.dart:43:12

The overflowing RenderFlex has an orientation of Axis.vertical. The edge of the RenderFlex that is overflowing has been marked in the rendering with a yellow and black striped pattern. This is usually caused by the contents being too big for the RenderFlex. Consider applying a flex factor (eg using an Expanded widget) to force the children of the RenderFlex to fit within the available space instead of being sized to their natural size. This is considered an error condition because it indicates that there is content that cannot be seen. If the content is legitimately bigger than the available space, consider clipping it with a ClipRect widget before putting it in the flex, or using a scrollable container rather than a Flex, like a ListView. The specific RenderFlex in question is: RenderFlex#1ad1e relayoutBoundary=up1 OVERFLOWING: creator: Column ← DicePage ← _BodyBuilder ← MediaQuery ← LayoutId-[<_ScaffoldSlot.body>] ← CustomMultiChildLayout ← AnimatedBuilder ← DefaultTextStyle ← AnimatedDefaultTextStyle ← _InkFeatures-[GlobalKey#cb60e ink renderer] ← NotificationListener ← PhysicalModel ← ⋯ parentData: offset=Offset(0.0, 56.0); id=_ScaffoldSlot.body (can use size) constraints: BoxConstraints(0.0<=w<=1280.0, 0.0<=h<=554.0) size: Size(1280.0, 554.0)

direction: vertical mainAxisAlignment: center mainAxisSize: max crossAxisAlignment: center verticalDirection: down

Image with no issue in device Image with overflow issue in chrome

Answer 1

Wrap the column with a sized box or container with defined height and width

SizedBox(
height:200,
width:200,
child: your column goes here,
)

Answer 2

Add below code inside Container

Container(

         width: MediaQuery.of(context).size.width,
         height: MediaQuery.of(context).size.height,
....
....
)

This is the generic way to define full width and height to your Container

Answer 3

If you don't try to fit your widget in screen and scroll is an option for you, you can use listview or a similar widget.

ListView(
     children: <Widget>[
              Column(

Otherwise, wrapping Container with MediaQuery.of(context).size.width and MediaQuery.of(context).size.height will work but there is just one catch here, if you use an appbar this height should be "MediaQuery.of(context).size.height - AppBar().preferredSize.height"