小编sam*_*in 的帖子

我对这个颤振简单图表代码有疑问。当我尝试运行代码时显示此错误。请任何人都可以帮助我......

参数类型“List<Series<dynamic,dynamic>>”无法分配给参数类型“List<Series<dynamic, String>>”

这是代码示例：

//Bar chart example
import 'package:charts_flutter/flutter.dart' as charts;
import 'package:flutter/material.dart';

class SimpleBarChart extends StatelessWidget {
  final List<charts.Series> seriesList;
  final bool animate;

  SimpleBarChart(this.seriesList, {this.animate = false});

  /// Creates a [BarChart] with sample data and no transition.
  factory SimpleBarChart.withSampleData() {
    return new SimpleBarChart(
      _createSampleData(),
      // Disable animations for image tests.
      animate: false,
    );
  }


  @override
  Widget build(BuildContext context) {
    return new charts.BarChart(
      seriesList,
      animate: animate,
    );
  }

  /// Create one series with sample hard coded data.
  static List<charts.Series<OrdinalSales, String>> …