如何在dart flutter中访问数组中的数组元素？

kqlmhetl 于 2023-07-31 发布在 Flutter

关注(0)|答案(1)|浏览(153)

我试图创建一个Flutter应用程序，从语音中获取命令，然后根据特定的命令，它将打印特定的文本。为此，我创建了一个类Command，它有一个commands数组，其中还包含3个数组，如下所示：

class Command {
  static final commands = [
    activity,
    face,
    object,
  ];

  static const activity = ['activity,is person using, giving, taking, waving'],
      face = ['standing, which teacher, looking, coming'],
      object = ['where is, is there'];
}

字符串
问题是我不知道如何访问Activity、Face和Object数组。错误发生在这一行：
terms：Command.命令，

body: SingleChildScrollView(
          reverse: true,
          child: Padding(
            padding: const EdgeInsets.all(20.0).copyWith(bottom: 140),
            child: SubstringHighlight(
              text: textSample,
              terms: Command.commands,
              textStyle: const TextStyle(
                color: Colors.teal,
                fontSize: 30,
              ),
              textStyleHighlight: const TextStyle(
                  color: Colors.blue,
                  fontSize: 30,
                  fontWeight: FontWeight.bold),
            ),
          )),

型
我也试过其他方法，但都出错了。
terms：Command.commands[]，
请告诉我如何访问要匹配的数组中的完整数组以显示结果。

dart

来源：https://stackoverflow.com/questions/75571811/how-to-access-elements-of-an-arrays-in-an-array-in-dart-flutter

1条答案

按热度按时间

xmjla07d1#

问题是我不知道如何访问Activity、Face和Object数组

class Command {
  var commands = [
    activity,
    face,
    object,
  ];

  static const activity = [
        'activity,is person using, giving, taking, waving',
        'second value in activity'
      ],
      face = ['standing, which teacher, looking, coming'],
      object = ['where is, is there'];
}

字符串
要访问这些数据，您必须这样做：

print(Command().commands);
// Print all value inside commands variable [[activity,is person using, giving, taking, waving], [standing, which teacher, looking, coming], [where is, is there]]

print(Command().commands[0]);
// Print all activity variable: [activity,is person using, giving, taking, waving]

print(Command().commands[0][1]);
// Print value inside activity variable by index, 'second value in activity'

型

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如何在dart flutter中访问数组中的数组元素？

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