参数类型 'Iterable<dynamic>' 无法分配给参数类型 'List<Widget>'

Question

大家好，我正在尝试在我的代码中映射一个字符串列表，但出现错误“参数类型 'Iterable' 无法分配给参数类型 'List'."。我正在尝试重现下图中的结果。这是下面的代码；

**quote.dart**

class Quote {

  String? text;
  String? author;

  
 

  
  Quote({ required this.text,required this.author });

}


**main.dart**

void main() {
  runApp(MaterialApp(home: QuoteList()));
}

class QuoteList extends StatefulWidget {
  const QuoteList({Key? key}) : super(key: key);

  @override
  State<QuoteList> createState() => _QuoteListState();
}

class _QuoteListState extends State<QuoteList> {

  @override
  List<dynamic> quotes = [
    //"Quote" is the the name of the class of the second dart file.
    Quote(
        author: "Eminem",
        text:
            "You better lose yourself in music the moment you own it never let it go"),
    Quote(
        author: "Walt Disney",
        text: "The way to get started is to quit talking and begin doing."),
    Quote(
        author: "Mother Teresa",
        text:
            "Spread love everywhere you go. Let no one ever come to you without leaving happier")

    //
    //     "
    //     ". -"
  ];
  
  
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Colors.grey[200],
      appBar: AppBar(
        title: Text("Awesome Killer Quotes",
            style: TextStyle(
              color: Colors.grey[700],
            )),
        centerTitle: true,
        backgroundColor: Colors.yellowAccent[400],
      ),
      body: Column(
     children: quotes.map(children: quotes.map((quote) => Text('${quote.text} - 
             ${quote.author}')).toList(),
         // (quote) => Text(quote.text + "-" + quote.author).toList(),
         // ((quote) => quoteTemplate(quote).toList()),
        ),
        // 

        //return Text('>>'+quote.text+', '+quote.author);
      ),
    );
  }
}

如果有人能帮助我，我将不胜感激P.S错误在main.dart文件中

Expected result of the code

Answer 1

所以试试这个

List<Quote> quotes = [
    //"Quote" is the the name of the class of the second dart file.
    Quote(
        author: "Eminem",
        text:
            "You better lose yourself in music the moment you own it never let it go"),
    Quote(
        author: "Walt Disney",
        text: "The way to get started is to quit talking and begin doing."),
    Quote(
        author: "Mother Teresa",
        text:
            "Spread love everywhere you go. Let no one ever come to you without leaving happier")
  ];

作为您的列表

然后是您的小部件

return Scaffold(
      backgroundColor: Colors.grey[200],
      appBar: AppBar(
        title: Text("Awesome Killer Quotes",
            style: TextStyle(
              color: Colors.grey[700],
            )),
        centerTitle: true,
        backgroundColor: Colors.yellowAccent[400],
      ),
      body: Column(
     children: quotes.map((e)
                         =>Text('${e.text}')
         ).toList(),
     ),
    );

Answer 2

保持简单

解决方案：

Column(
    children: quotes.map((quote) => Text('${quote.text} '
        '- ${quote.author}')).toList()
    );

参数类型 'Iterable<dynamic>' 无法分配给参数类型 'List<Widget>'

The argument type 'Iterable<dynamic>' can't be assigned to the parameter type 'List<Widget>'

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