Dart 将字符串作为FontAwesomeIcons传递

我在我的应用程序中使用来显示一些图标

我从json获取图标的名称作为字符串。。如何将其传递给图标

有办法做到这一点吗

例如：

我从json得到：

String icon = 'ad';

然后我想这样使用它：

new Icon(FontAwesomeIcons.icon),

---

我知道这样不行。。但是我该怎么做呢？这可行吗

我找到了一种可能对你有帮助的方法。编辑font\u awesome\u flatter.dart文件，如下所示，也可访问

我只是用两个图标来演示，你可以根据需要继续使用，也可以全部使用

font\u awesome\u flatter.dart

图书馆字体(真棒)(颤振),

import 'package:flutter/widgets.dart';
import 'package:font_awesome_flutter/icon_data.dart';

// THIS FILE IS AUTOMATICALLY GENERATED!

class FontAwesomeIcons {

  static const createDoc = {
    'fiveHundredPx':  IconDataBrands(0xf26e),
    'accessibleIcon':  IconDataBrands(0xf368),
      //.......add all Icons HERE
  };

  static const IconData fiveHundredPx = const IconDataBrands(0xf26e);
  static const IconData accessibleIcon = const IconDataBrands(0xf368);
  static const IconData accusoft = const IconDataBrands(0xf369);
  static const IconData acquisitionsIncorporated = const IconDataBrands(0xf6af);
  static const IconData ad = const IconDataSolid(0xf641);
  static const IconData addressBook = const IconDataRegular(0xf2b9);
  static const IconData solidAddressBook = const IconDataSolid(0xf2b9);
  static const IconData addressCard = const IconDataRegular(0xf2bb);
  static const IconData solidAddressCard = const IconDataSolid(0xf2bb);
  //.......
  //.......add all Icons HERE To as already  in your file
  }

现在，您可以使用以下代码：

import 'package:flutter/material.dart';
import 'package:font_awesome_flutter/font_awesome_flutter.dart';

void main() {
  runApp(new FontAwesomeGalleryApp());
}

class FontAwesomeGalleryApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Font Awesome Flutter Gallery',
      theme: new ThemeData.light().copyWith(
        iconTheme: new IconThemeData(size: 36.0, color: Colors.black87),
        textTheme: new TextTheme(
          body1: new TextStyle(fontSize: 16.0, color: Colors.black87),
        ),
      ),
      home: new Home(),
    );
  }
}

class Home extends StatelessWidget {

  String data = 'fiveHundredPx';

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: new Container(
        child: Center(
          child: Icon(FontAwesomeIcons.createDoc[data.toString()]),
        ),
      ),
    );
  }
}

---

我知道这种方法有点难，但我只找到了这种方法。

您可以将unicode数据保存在Json中。例如：

static const IconData clock = const IconDataRegular(0xf017);

将f017保存在Json中

稍后使用以下函数转换为int

int getHexFromStr(String fontCode) {
  int val = 0;
  int len = fontCode.length;
  for (int i = 0; i < len; i++) {
    int hexDigit = fontCode.codeUnitAt(i);
    if (hexDigit >= 48 && hexDigit <= 57) {
      val += (hexDigit - 48) * (1 << (4 * (len - 1 - i)));
    } else if (hexDigit >= 65 && hexDigit <= 70) {
      // A..F
      val += (hexDigit - 55) * (1 << (4 * (len - 1 - i)));
    } else if (hexDigit >= 97 && hexDigit <= 102) {
      // a..f
      val += (hexDigit - 87) * (1 << (4 * (len - 1 - i)));
    } else {
      throw new FormatException("An error occurred when converting");
    }
  }
  return val;
}  

Icon(IconDataSolid(getHexFromStr(' f017')))