Layout ERROR when using COLUMN layout

Question

Hello,If I have a screen and want the body to contain 2 children (e.g. a breadcrumb, followed by your 
SfPdfViewer

then, I get a hasSize error (please see the attachment). On the other hand, if I set your SfPdfViewer widget as the body then it all works fine (but I need breadcrumb in my case)below is pseudo code for issue:  @override  Widget build(BuildContext context) {    return Scaffold(      appBar: AppBar(        title: Text(AppLocalizations.of(context)?.sample_text??            common.sample_test),        titleSpacing: 0,        elevation: 0, // appbar shadow off      ),      body: Column(children: <Widget>[        breadCrumbBar(context, _crumbs), // My widget breadCrumbs         // I tried using sizeBox to limit height and that works but not ideal        SizedBox(        // If i set a height then it works but the pdf height is wrong depending       //  on the device        //  height: MediaQuery.of(context).size.height - 240,          child: SfPdfViewer.network(            headers: {              'Authorization': 'Bearer $_jwt',            },            interactionMode: PdfInteractionMode.pan,            _folder.listOfItems[_posterIndex].uri,            controller: _pdfViewerController,            key: _pdfViewerKey,          ), //net        ), // sizeBox      ]), // children + column    ); // Scaffold  } // Any help will be greatlAttachment: hasSizeErr_c2562f53.zip

Deepika Ravi · Accepted Answer

Hi enrique benedetti,To resolve the issue when adding the
SfPdfViewer widget to the column widget, kindly refer to the following code
snippet.

@override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const
  Text('Syncfusion Flutter PDF Viewer'),
      ),
      body: Column(
        children: [
          Container(
            height:
  200,
            color:
  Colors.pink,
          ),
          Expanded(
            child: SfPdfViewer.network(
             
  'https://cdn.syncfusion.com/content/PDFViewer/flutter-succinctly.pdf',
              key: _pdfViewerKey,
            ),
          ),
        ],
      ),
    );
  }

Kindly try this and revert us if you
have any concerns.Regards,Deepika Ravi

enrique benedetti · Answer

Hello,I made the suggested changes and the page/program no longer crashes.Thanks for your prompt response.Thanks again,Enrique