Flutter 颤振型'；字符串'；不是类型为'；列表<；字符串>'；属于'；功能结果'；

我正在尝试显示鞋码列表：

Text( widget.shoe.size[i].toString(), style: TextStyle(fontSize: 18), ),

class Shoe {final String name;
  final List<String> size;
  final String imageurl;

  Shoe(this.name, this.size, this.imageurl);
}


List<Shoe> shoes = [
  Shoe('Teebon M', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/ke8uv0w0-0/shoe/i/g/f/cm4701-8-adidas-silvmt-cblack-ftwwht-original-imafuywffvmfxcgr.jpeg'),
  Shoe('Hyperon M,', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/jseyoi80/shoe/n/v/u/ck9515-8-adidas-mysblu-ftwwht-cblack-original-imafdzrzkvud2eyc.jpeg'),
  Shoe('Glarus M', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/kdrpksw0-0/shoe/f/a/k/cm4979-8-adidas-deeblu-silvmt-original-imafuhzgu4yyg6bp.jpeg'),
  Shoe('Pictor M', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/ki96c280-0/shoe/n/r/x/ew2423-6-adidas-dovgry-gresix-stigrn-original-imafy38tfuytnxjk.jpeg'),
];

════════ Exception caught by widgets library ═══════════════════════════════════
The following _TypeError was thrown building Details(dirty, dependencies: [MediaQuery], state: _DetailsState#a0102):
type 'String' is not a subtype of type 'List<String>' of 'function result'

我的鞋型是：

Text( widget.shoe.size[i].toString(), style: TextStyle(fontSize: 18), ),

class Shoe {final String name;
  final List<String> size;
  final String imageurl;

  Shoe(this.name, this.size, this.imageurl);
}


List<Shoe> shoes = [
  Shoe('Teebon M', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/ke8uv0w0-0/shoe/i/g/f/cm4701-8-adidas-silvmt-cblack-ftwwht-original-imafuywffvmfxcgr.jpeg'),
  Shoe('Hyperon M,', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/jseyoi80/shoe/n/v/u/ck9515-8-adidas-mysblu-ftwwht-cblack-original-imafdzrzkvud2eyc.jpeg'),
  Shoe('Glarus M', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/kdrpksw0-0/shoe/f/a/k/cm4979-8-adidas-deeblu-silvmt-original-imafuhzgu4yyg6bp.jpeg'),
  Shoe('Pictor M', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/ki96c280-0/shoe/n/r/x/ew2423-6-adidas-dovgry-gresix-stigrn-original-imafy38tfuytnxjk.jpeg'),
];

════════ Exception caught by widgets library ═══════════════════════════════════
The following _TypeError was thrown building Details(dirty, dependencies: [MediaQuery], state: _DetailsState#a0102):
type 'String' is not a subtype of type 'List<String>' of 'function result'

classshoe{最后的字符串名；
最终列表大小；
最终字符串imageurl；
Shoe（this.name、this.size、this.imageurl）；
}
列出鞋子=[
鞋款（'Teebon M'，['38'，'39'，'40'，'41'，'42']，
'https://rukminim1.flixcart.com/image/800/960/ke8uv0w0-0/shoe/i/g/f/cm4701-8-adidas-silvmt-cblack-ftwwht-original-imafuywffvmfxcgr.jpeg'),
鞋子（'Hyperon M'，['38'，'39'，'40'，'41'，'42']，
'https://rukminim1.flixcart.com/image/800/960/jseyoi80/shoe/n/v/u/ck9515-8-adidas-mysblu-ftwwht-cblack-original-imafdzrzkvud2eyc.jpeg'),
鞋子（'Glarus M'，[38'，39'，40'，41'，42']，
'https://rukminim1.flixcart.com/image/800/960/kdrpksw0-0/shoe/f/a/k/cm4979-8-adidas-deeblu-silvmt-original-imafuhzgu4yyg6bp.jpeg'),
鞋子（'Pictor M'，[38'，39'，40'，41'，42']，
'https://rukminim1.flixcart.com/image/800/960/ki96c280-0/shoe/n/r/x/ew2423-6-adidas-dovgry-gresix-stigrn-original-imafy38tfuytnxjk.jpeg'),
];

但是每次我遇到这个错误：

Text( widget.shoe.size[i].toString(), style: TextStyle(fontSize: 18), ),

class Shoe {final String name;
  final List<String> size;
  final String imageurl;

  Shoe(this.name, this.size, this.imageurl);
}


List<Shoe> shoes = [
  Shoe('Teebon M', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/ke8uv0w0-0/shoe/i/g/f/cm4701-8-adidas-silvmt-cblack-ftwwht-original-imafuywffvmfxcgr.jpeg'),
  Shoe('Hyperon M,', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/jseyoi80/shoe/n/v/u/ck9515-8-adidas-mysblu-ftwwht-cblack-original-imafdzrzkvud2eyc.jpeg'),
  Shoe('Glarus M', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/kdrpksw0-0/shoe/f/a/k/cm4979-8-adidas-deeblu-silvmt-original-imafuhzgu4yyg6bp.jpeg'),
  Shoe('Pictor M', ['38', '39', '40', '41', '42'],
      'https://rukminim1.flixcart.com/image/800/960/ki96c280-0/shoe/n/r/x/ew2423-6-adidas-dovgry-gresix-stigrn-original-imafy38tfuytnxjk.jpeg'),
];

════════ Exception caught by widgets library ═══════════════════════════════════
The following _TypeError was thrown building Details(dirty, dependencies: [MediaQuery], state: _DetailsState#a0102):
type 'String' is not a subtype of type 'List<String>' of 'function result'

════════ widgets库捕获到异常═══════════════════════════════════
生成详细信息时引发了以下_TypeError（脏，依赖项：[MediaQuery]，状态：_DetailsState#a0102）：
类型“字符串”不是“函数结果”的“列表”类型的子类型

我认为

widget.shoe.size[I]

不包含您认为它包含的值。创建

文本

对象的方式看起来不错。可能尝试调试以查看哪些值

widget

，

widget.shoe

等必须查看您的问题所在。

不要使用.toString（）函数，请按以下方式执行：

Text( '${widget.shoe.size[i]}', style: TextStyle(fontSize: 18), ),

---

要显示尺寸列表，您可以将所有数字串联在一个

字符串中并显示它

Text（widget.shoe.size.join（'，'）//逗号分隔的数字
你的模型没问题。.可能问题在于你在哪里使用了
鞋
并调用了列表。你能添加代码吗请更新代码最好的方法是编写测试代码，你可以看到问题。你只需删除小部件.shoe.size[i]中的.toString（）已经是一个字符串了。非常感谢您的回答，这是我在stackoverflow上发布的第一个问题，没想到会这么快得到答案。非常感谢您的帮助。非常感谢您的帮助。非常感谢您的帮助。非常感谢您的帮助。非常感谢您的回答非常感谢您的帮助