Home / Questions / 311048
Accepted
Roberto Hermosilla F
Asked: 2020-11-24 22:30:58 +0800 CST 2020-11-24 22:30:58 +0800 CST

Flutter - problems calling final variable type string

  • 772

I want to be able to have the value of a variable that I receive as a parameter from another screen through the class and insert the value of the variable in the elements of an array: import 'package:flutter/material.dart'; import 'package:carousel_slider/carousel_slider.dart';

class FotosPage extends StatefulWidget {
    final String id; //Este es el valor que recibo desde screen anterior
    FotosPage(this.id,{Key key}): super(key: key);


    @override
    FotosPageState createState() => FotosPageState();
}

class FotosPageState extends State<FotosPage> {
     CarouselSlider carouselSlider;
     int _current = 0;
     String _num;
     //Aqui trato de usar la variable _num y me arroja error: only static members can be accessed in initializers
     List imgList = [
    'https://xxxxxxxxxx.com/read/${_num}/1.jpg',
        'https://xxxxxxxxxx.com/read/${_num}/2.jpg',
    'https://xxxxxxxxxx.com/read/${_num}/3.jpg',

    ];

    @override
    initState() {
        _num = widget.id; //Paso el valor del parámetro recibido a la variable
        super.initState();
    }
}
flutter

1 Answers

  1. Best Answer

    The error is clear, you cannot access values initializers​​that are declared as variables, using non-static attributes.

    To solve it you can do the following:

    //declara tu lista vacía
     List imgList = List<String>();


    @override
    initState() {
        final _num = widget.id; //Paso el valor del parámetro recibido a la variable
         //inicializa aquí
        imgList.addAll([
        'https://xxxxxxxxxx.com/read/${_num}/1.jpg',
        'https://xxxxxxxxxx.com/read/${_num}/2.jpg',
        'https://xxxxxxxxxx.com/read/${_num}/3.jpg',]);
        super.initState();
    }
    • 1