大家好，我正在嘗試在我的代碼中映射字串串列，但它給了我錯誤“引數型別'Iterable'不能分配給引數型別'List'。”。我正在嘗試重現下圖中的結果。這是下面的代碼；
**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} -
${quote.author}')).toList(),
// (quote) => Text(quote.text "-" quote.author).toList(),
// ((quote) => quoteTemplate(quote).toList()),
),
//
//return Text('>>' quote.text ', ' quote.author);
),
);
}
}
如果有人可以幫助我，我將非常感激???? PS錯誤在main.dart檔案中
代碼的預期結果
uj5u.com熱心網友回復：
所以試試這個
List<Quote> quotes = [
//"Quote" is the the name of the class of the second dart file.
Quote(
author: "Eminem",
text:
"You better lose yourself in music the moment you own it never let it go"),
Quote(
author: "Walt Disney",
text: "The way to get started is to quit talking and begin doing."),
Quote(
author: "Mother Teresa",
text:
"Spread love everywhere you go. Let no one ever come to you without leaving happier")
];
作為你的清單
然后你的小部件
return Scaffold(
backgroundColor: Colors.grey[200],
appBar: AppBar(
title: Text("Awesome Killer Quotes",
style: TextStyle(
color: Colors.grey[700],
)),
centerTitle: true,
backgroundColor: Colors.yellowAccent[400],
),
body: Column(
children: quotes.map((e)
=>Text('${e.text}')
).toList(),
),
);
uj5u.com熱心網友回復：
保持簡單
解決方案：
Column(
children: quotes.map((quote) => Text('${quote.text} '
'- ${quote.author}')).toList()
);轉載請註明出處，本文鏈接：https://www.uj5u.com/net/442459.html