重新编译后文件丢失

Question

Error:编译我的文件时出现以下错误：library is in a package that is not known

这是指我的pages文件夹下的文件：home.dart。

这些是pubspec.yaml文件中的my dependencies：

dependecies:
  flutter:
    sdk: flutter
  http: "^0.12.0+1"
  intl: "^0.15.8"
  charts_flutter: "0.6.0"
  cupertino_icons: ^0.1.2

My code：

import 'package:fLutter/materiaL.dart';
import 'package:charts_fLutter/fLutter.dart' as charts

class PieChart extends StatefulWidget {
final Widget child;
override
PieChart({Key key, this.child}) : super(key: key);
_PieChartState createState() => _PieChartState();


class GPieChartState extends State<PieChart> {
List<charts.Series<Effl,String>> _seriesPieData;
_generateData() {
var        pieData = [
new Effl( ' > ObJectlf ' , 35.8, Colors.bZue[6oo]),
new Effl( ' < ObJectlf ' , 8.3, Colors.red[6oo]),

Answer 1

好的，所以看看它说的错误

Refers, in an import, to the following library:
  package:efficience001/pages/home.dart
  That library is in a package that is not know. Maybe you forgot to mention it in your pubspec.yaml file?

这意味着Flutter无法在pages目录下找到home.dart文件。

由于您之前说它之前有效，唯一可能的逻辑解释是您已重命名，删除或移动了文件“home.dart”或其父文件夹。