_InternalLinkedHashMap<String, dynamic>' is not a subtype of type 'Iterable<dynamic>'

0

I am new to flutter can u help me to get out from this....!

"Another exception was thrown: SliverGeometry is not valid: The "scrollExtent" is negative."

I have seen many tutorials on youtube google but i cant find solution on this i dnt knw how to get solution from in this.. plz help meeee! thank you for your time!

import 'package:flutter/material.dart';
import 'dart:ui';
import 'dart:convert';
import 'data/newshelfdata.dart';
import 'data/shelfscreendata.dart';
import 'package:google_fonts/google_fonts.dart';
import 'constant/constant.dart' as Constants;
import 'PhotographerWelcomeNote.dart';
import 'package:http/http.dart' as http;
import 'Utility/global.dart' as Globals;
import 'data/errordata.dart';
import 'data/shelfscreendata.dart';
import 'data/shelfscreendata.dart';



class ShelfScreen extends StatefulWidget {
@override
_ShelfScreenState createState() => _ShelfScreenState();
 }

 class _ShelfScreenState extends State<ShelfScreen> {
bool  _isLoading = false;
List<CompaignShelfList> _camp = List<CompaignShelfList>();

Future<List<CompaignShelfList>> Shelf() async {
   Map data = {
  "AccessToken": "MjUyLTg1REEyUzMtQURTUzVELUVJNUI0QTIyMTE=",
  "CustomerId": 1
 };

final http.Response response = await http.post(
  "http://api.pgapp.in/v1/shelflist",
  headers: <String, String>{
    'Content-Type': 'application/json; charset=UTF-8',
  },
  body: jsonEncode(data),
);

   var jsonResponse = null;


 //       debugPrint(CompaignShelfList.toString());
var camp = List<CompaignShelfList>();
   if (response.statusCode == 200)
{
jsonResponse = json.decode(response.body);
for (var jsonResponse in jsonResponse)
{
 camp.add(CompaignShelfList.fromJson(jsonResponse));
}

 }
   return camp;
 }
 @override
 void initState() {
super.initState();
 Shelf();
}
 @override
 Widget build(BuildContext context) {
return Scaffold(
  appBar: AppBar(
    backgroundColor: const Color(0xfff8f8f8),
    leading: Padding(
      padding: EdgeInsets.only(left: 20),
      child:  Image.asset("assets/logo.png",width: 45,height: 45,),
    ),
    title: Center(
      child: Image.asset("assets/Textimage.png",width: 170,height: 45),
    ),
    actions: <Widget>[
         Padding(
           padding: const EdgeInsets.only(right: 20,top: 10,bottom: 10),
           child: Container(
            height: 8,
            width: 35,
            child: CircleAvatar(
              maxRadius: 20,
              backgroundImage: AssetImage("assets/images/prof.jpg"),
            ),
        ),
         ),

    ],

  ),
  body: GridView.builder(
      shrinkWrap: false,
      scrollDirection: Axis.vertical,
      gridDelegate: new SliverGridDelegateWithFixedCrossAxisCount(
        crossAxisCount: 1,
        childAspectRatio:MediaQuery.of(context).size.width /
            (MediaQuery.of(context).size.height / 2),
        mainAxisSpacing: 1.0,
        crossAxisSpacing: 1.0,

      ),
      itemCount: _camp.length,
      itemBuilder: (context, int index){
        return
          CategoriesTile(
          imgUrls: _camp[index].coverImagePath,
          catagory:_camp[index].businessName,
          date: _camp[index].date,
          email: _camp[index].photographerEmail,
          stduio:_camp[index].photographerMobileNumber,
        );
    //              Image.asset(Shelflist[index]["text_3"],fit: BoxFit.cover,);
      }
  )

  );

  }
  }




 class CategoriesTile extends StatelessWidget {
 final String imgUrls, catagory , date,email,stduio;

 CategoriesTile({@required this.imgUrls, @required this.catagory,@required this.date,@required 
 this.email,@required this.stduio});

 @override
 Widget build(BuildContext context) {
  return GestureDetector(
  onTap: () {
    Navigator.push(
        context,
        MaterialPageRoute(
            builder: (context) => PhotographerWelcomeNote(
              Coverpic: imgUrls,
            )));
  },
  child: Card(
    semanticContainer: true,
    clipBehavior: Clip.antiAliasWithSaveLayer,
    elevation: 5,
    child: Container(
      margin: EdgeInsets.all(8),
      child:
            Stack(
        children: <Widget>[
          Positioned(
            top: 1,
            left: 1,
            right: 1,
            bottom: 50,
            child: ClipRRect(
                borderRadius: BorderRadius.circular(8),
                child:Image.asset(
                  imgUrls,
                  height: 250,
                  width: 400,
                  fit: BoxFit.cover,
                )
               ),
          ),
          Positioned(
            bottom: 50,
            left: 1,
            right: 1,
     //                width: 400,
            height: 60,
            child: ClipRect(
              child: BackdropFilter(
                filter: ImageFilter.blur(sigmaX: 3, sigmaY: 3),
                child: Container(
                  decoration: BoxDecoration(
                    color: Colors.black.withOpacity(0),
                    borderRadius: BorderRadius.circular(8),
                  ),

                ),
              ),
            ),
          ),
         Positioned(
           bottom: 80,
           left: 20,
           child: Container(
                  height: 50,
                  width: 400,
                  alignment: Alignment.bottomLeft,
                  child: Text(
                    catagory ?? "Yo Yo",
                    style: GoogleFonts.nunito(
                      fontSize: 18,
                      color: const Color(0xffffffff),
                      fontWeight: FontWeight.w700,
                      height: 1.7647058823529411,
                    ),
                  )),
         ),
          Positioned(
            left: 20,
            bottom: 60,
            child: Container(
                   height: 30,
                   width: 150,
                alignment: Alignment.bottomLeft,
                          child: Text(
                    date,style: GoogleFonts.nunito(
                  fontSize: 13,
                  color: const Color(0xffffffff),
                  fontWeight: FontWeight.w700,
                  height: 1.7647058823529411,
                ),
                ),
              ),
          ),
                     Positioned(
                   bottom: 20,
                       left: 90,
                       child: Container(
                       height: 23,

                       alignment: Alignment.center,
                         child: Text(
                         stduio,
                             style: GoogleFonts.nunito(
                           fontSize: 18,
                         color: const Color(0xff7f7f7f),
                         fontWeight: FontWeight.w700,
                         )
                       ),
                     ),
                     ),
                      Positioned(
                               bottom: 1,
                                left: 90,
                           child: Container(
                                  height: 20,

                            alignment: Alignment.center,
                            child: Text(
                              email,style: GoogleFonts.nunito(
                              fontSize: 10,
                              color: const Color(0xffb4b4b4),
                              fontWeight: FontWeight.w600,
                            ),
                            ),
                           ),
                      ),
          Positioned(
           bottom: 2,
            left: 10,
            child: Container(
              width: 66.0,
              height: 39.0,
              decoration: BoxDecoration(
                image: DecorationImage(
                  image: const AssetImage(
                      'assets/images/camlogo.jpg'),
                  fit: BoxFit.cover,
                ),
                border: Border.all(
                    width: 1.0, color: const Color(0xffb4b4b4)),
              ),
            ),
          ),
        ],
      ),
    ),
  ),

   );
  }
  }
api
flutter
dart
asked on Stack Overflow Nov 14, 2020 by Ah Zeem khatib • edited Nov 14, 2020 by Ah Zeem khatib

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