Flutter命名路由中如何传递多个参数？

方法一：使用Map传递参数（快速实现） #

直接把需要传递的参数打包成Map，作为arguments传入：

修改Navigator调用代码：

Navigator.of(context).pushNamed(
  AppRoutes.digitalBusinessGuideInstructions,
  arguments: {
    'selectedAmount': selectedAmount,
    'selectedIndexes': selectedIndexes, // 按实际类型传入，比如int或List<int>
  },
);

修改路由处理代码：

case AppRoutes.digitalBusinessGuideInstructions:
  final params = settings.arguments as Map<String, dynamic>;
  final int selectedAmount = params['selectedAmount'] as int;
  // 若selectedIndexes是列表类型，改为List<int> selectedIndexes = params['selectedIndexes'] as List<int>
  final int selectedIndexes = params['selectedIndexes'] as int;
  return AppPageRoute(
    builder: (context) => DigitalBusinessGuideInstructions(
      selectedAmount: selectedAmount,
      selectedIndexes: selectedIndexes,
    ),
  );

方法二：使用自定义类封装参数（类型安全，推荐） #

如果想避免Map类型转换的潜在风险，可定义专门的参数类实现类型安全传递：

1. 定义参数类：

class DigitalBusinessParams {
  final int selectedAmount;
  final int selectedIndexes; // 或List<int>，根据实际需求调整类型

  DigitalBusinessParams({
    required this.selectedAmount,
    required this.selectedIndexes,
  });
}

2. 修改Navigator调用代码：

Navigator.of(context).pushNamed(
  AppRoutes.digitalBusinessGuideInstructions,
  arguments: DigitalBusinessParams(
    selectedAmount: selectedAmount,
    selectedIndexes: selectedIndexes,
  ),
);

3. 修改路由处理代码：

case AppRoutes.digitalBusinessGuideInstructions:
  final params = settings.arguments as DigitalBusinessParams;
  return AppPageRoute(
    builder: (context) => DigitalBusinessGuideInstructions(
      selectedAmount: params.selectedAmount,
      selectedIndexes: params.selectedIndexes,
    ),
  );

注意：如果selectedIndexes是列表类型（如List<int>），只需将参数类和类型转换部分的类型对应修改即可，两种方法均适用。

内容的提问来源于stack exchange，提问作者KIRAx2000