小编Gok*_*dar的帖子

如何在 Flutter 中将 String 值转换为 Icons 值，我从 json 获取 Icon 值作为字符串。

当我尝试使用该值时出现以下错误

error: The argument type 'String' can't be assigned to the parameter type 'IconData'. (argument_type_not_assignable at [hippo] lib\screens\dynamic_list.dart:71)

{
  "page": 1,
  "MenuItems": [
    {
      "id": 419701,
      "icon": "MdiIcons.account",
      "name": "account"
    },
    {
      "id": 419702,
      "icon": "MdiIcons.currencyUsd",
      "name": "Funds"
    },
    {
      "id": 419703,
      "icon": "MdiIcons.home",
      "name": "home"
    }
  ]
}

是否可以在flutter ThemeData的backgroundColor属性中设置渐变颜色而不是单一颜色？

final ThemeData base = ThemeData.light();
return base.copyWith(
  visualDensity: VisualDensity.adaptivePlatformDensity,
  textTheme: _texttheme(base.textTheme),
  buttonTheme: _buttonTheme(base.buttonTheme),
  inputDecorationTheme: _inputDecorationTheme(base.inputDecorationTheme),
  bottomAppBarTheme: _bottomAppBarTheme(base.bottomAppBarTheme),

  backgroundColor: Colors.blueGrey // gradient color instead of single color
);