CODEWITHSUNDEEP
flutterdart
pythonier
pythonier

Reputation: 1

Error: Expected '{' before this. @override

I'm getting an error that i'm not understanding in my flutter code.

this is my code:

import 'package:flutter/material.dart';


class ReusableScreen extends StatelessWidget{
  final List <String> dirs=['11', '12', '13', '14', '21', '22', '23', '24', '31', '32', '33', '34', '41', '42', '43', '44'];
  final String jour;
  final String heure;

  ReusableScreen({
    @required this.jour,
    @required this.heure,
})

  @override
  Widget build(BuildContext context) {
    return ListView(
      scrollDirection: Axis.horizontal,
      children: [for (var temp in dirs) AssetImage('assets/'+this.jour+"/"+this.heure+"/"+this.dirs[temp])],
    );
  }

}

this is the full error message :

lib/wid.dart:14:3: Error: Expected '{' before this.
  @override
  ^
lib/wid.dart:18:101: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
      children: [for (var temp in dirs) AssetImage('assets/'+this.jour+"/"+this.heure+"/"+this.dirs[temp])],
                                                                                                    ^
lib/wid.dart:18:41: Error: A value of type 'AssetImage' can't be assigned to a variable of type 'Widget'.
 - 'AssetImage' is from 'package:flutter/src/painting/image_resolution.dart' ('/C:/flutter/packages/flutter/lib/src/painting/image_resolution.dart').
 - 'Widget' is from 'package:flutter/src/widgets/framework.dart' ('/C:/flutter/packages/flutter/lib/src/widgets/framework.dart').
      children: [for (var temp in dirs) AssetImage('assets/'+this.jour+"/"+this.heure+"/"+this.dirs[temp])],

Can you help me figure out the problem ?

Upvotes: -1

Views: 3359

Answers (2)

EncryptedSpirit
EncryptedSpirit

Reputation: 182

For the error


lib/wid.dart:18:101: Error: A value of type 'String' can't be assigned to a variable of type 'int'.
      children: [for (var temp in dirs) AssetImage('assets/'+this.jour+"/"+this.heure+"/"+this.dirs[temp])],

You have an error in this line :

AssetImage('assets/'+this.jour+"/"+this.heure+"/"+this.dirs[temp])

Error: this.dirs[temp]

You can't access to the List<String> data giving it a String. You need to give it a Integer like an array. Like this.dirs[4]

But because you're doing (var temp in dirs) you can simply give the temp value. (Because is the same result than this.dirs[index])

So it should be like this:

AssetImage('assets/'+this.jour+"/"+this.heure+"/"+temp);


For the error

Error: A value of type 'AssetImage' can't be assigned to a variable of type 'Widget'.
 - 'AssetImage' is from 'package:flutter/src/painting/image_resolution.dart' ('/C:/flutter/packages/flutter/lib/src/painting/image_resolution.dart').
 - 'Widget' is from 'package:flutter/src/widgets/framework.dart' ('/C:/flutter/packages/flutter/lib/src/widgets/framework.dart').
      children: [for (var temp in dirs) AssetImage('assets/'+this.jour+"/"+this.heure+"/"+this.dirs[temp])],

I think you need to wrap the AssetImage in a container

Upvotes: 1

Elfor
Elfor

Reputation: 587

you're missing a semicolon after the constructor

ReusableScreen({
    @required this.jour,
    @required this.heure,
});

Upvotes: 7

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