React 本机矢量图标 - 动态类型答案

【问题标题】：React native vector icons - dynamic typeReact 本机矢量图标 - 动态类型
【发布时间】：2019-07-06 13:10:54
【问题描述】：

我正在使用不同类型的 React Native 矢量图标 - Material 和 FontAwesome，具体取决于特定图标的可用性。我想创建一个通用组件来包装整个应用程序中图标的使用。到目前为止，我有：

import React from 'react';
import Icon from "react-native-vector-icons/FontAwesome";
import {theme} from "../../../styles/style";

/**
 * Common reusable icon component
 * @param props
 * @returns {*}
 */
const icon = (props) => {
    return (
        <Icon
            size={theme.SIZE_ICON}
            color={theme.BACKGROUND_ICON_COLOR}
            {...props}
            style={props.style}/>
    );
};

export default icon;

仅适用于 FontAwesome，我怎样才能使其动态基于例如prop 参数，以便我可以在需要时使用 Material 图标？注意：我不想为每种类型创建单独的组件，例如IconMaterial、IconFontAwesome 等。无论类型如何，我都希望组件的名称为 Icon。这可能吗？

【问题讨论】：

标签： react-native react-native-vector-icons

【解决方案1】：

您可以将一个名为 iconFamily 的道具传递给您的图标组件：

在您的图标组件中，您正在导入所有要使用的字体，例如：

import IconFA from "react-native-vector-icons/FontAwesome";
import IconMA from "react-native-vector-icons/Material";

然后在Icon的渲染函数里面：

  const Icon = (props) => {

  renderIcon = () => {
    if (props.iconFamily == "FA") {
      return (
        <IconFA
        size={23}
        {...props}
        style={props.style}/>
      );
   } 
   if (props.iconFamily == "MA") {
      return (
        <IconMA
        size={23}
        {...props}
        style={props.style}/>
      );
   }
  }
  return (
      renderIcon()
  )
}

当您使用自定义图标组件时，您只需指定 iconFamily 属性：

 <Icon iconFamily="FA" name="home" color="green" /> 
 <Icon iconFamily="MA" name="code" color="red" />

输出：

完整的工作示例：

https://snack.expo.io/@tim1717/humiliated-hummus

【讨论】：

【解决方案2】：

我一直喜欢这样做。 ~/components/VectorIcons.js

import AntDesign from 'react-native-vector-icons/AntDesign'
import Entypo from 'react-native-vector-icons/Entypo'
import EvilIcons from 'react-native-vector-icons/EvilIcons'
import Feather from 'react-native-vector-icons/Feather'
import FontAwesome from 'react-native-vector-icons/FontAwesome'
import FontAwesome5 from 'react-native-vector-icons/FontAwesome5'
import FontAwesome5Pro from 'react-native-vector-icons/FontAwesome5Pro'
import Fontisto from 'react-native-vector-icons/Fontisto'
import Foundation from 'react-native-vector-icons/Foundation'
import Ionicons from 'react-native-vector-icons/Ionicons'
import MaterialCommunityIcons from 'react-native-vector-icons/MaterialCommunityIcons'
import MaterialIcons from 'react-native-vector-icons/MaterialIcons'
import Octicons from 'react-native-vector-icons/Octicons'
import SimpleLineIcons from 'react-native-vector-icons/SimpleLineIcons'
import Zocial from 'react-native-vector-icons/Zocial'


const VectorIcon = {
  AntDesign,
  Entypo,
  EvilIcons,
  Feather,
  FontAwesome,
  FontAwesome5,
  FontAwesome5Pro,
  Fontisto,
  Foundation,
  Ionicons,
  MaterialCommunityIcons,
  MaterialIcons,
  Octicons,
  SimpleLineIcons,
  Zocial,
}

export default VectorIcon

在任何 jsx 中使用 ~/pages/Home/index.jsx

import VectorIcon from '../../components/VectorIcon'

return (
  <>
   // ...
   <VectorIcon.AntDesign name="home" />
   <VectorIcon.Fontisto name="clock-outline" />
  </>
)

【讨论】：

【解决方案3】：

这是我的图标组件，也许你可以从中得到一个想法。

import React, { useEffect, useState } from "react";
import {
  Ionicons,
  AntDesign,
  Entypo,
  EvilIcons,
  Feather,
  FontAwesome,
  FontAwesome5,
  Fontisto,
  Foundation,
  MaterialCommunityIcons,
  MaterialIcons,
  Octicons,
  SimpleLineIcons,
  Zocial,
} from "@expo/vector-icons";

const Icon= ({ family, name, ...props }) => {
  let Family;

  switch (family) {
    case "AntDesign":
      Family = AntDesign;
      break;
    case "Entypo":
      Family = Entypo;
      break;
    case "EvilIcons":
      Family = EvilIcons;
      break;
    case "Feather":
      Family = Feather;
      break;
    case "FontAwesome":
      Family = FontAwesome;
      break;
    case "FontAwesome5":
      Family = FontAwesome5;
      break;
    case "Fontisto":
      Family = Fontisto;
      break;
    case "Foundation":
      Family = Foundation;
      break;
    case "Ionicons":
      Family = Ionicons;
      break;
    case "MaterialCommunityIcons":
      Family = MaterialCommunityIcons;
      break;
    case "MaterialIcons":
      Family = MaterialIcons;
      break;
    case "Octicons":
      Family = Octicons;
      break;
    case "SimpleLineIcons":
      Family = SimpleLineIcons;
      break;
    case "Zocial":
      Family = Zocial;
      break;
    default:
      Family = Ionicons;
  }

  return (
    <Family
      name={name ? name : "help-outline"}
      color={"#000"}
      size={20}
      {...props}
    />
  );
};

export default Icon;

要使用它，您可以这样做。

<Icon
    family="Ionicons"
    name="add-outline"
    color={"#333"}
    size={30}
/>

我添加了默认的系列和名称以避免错误。

【讨论】：