reactjs - React material-table 不显示表格图标

Question

我有一个项目，我必须使用一张 table 。我正在使用 Material 表。但我似乎无法让它看起来正确。表格所需的图标没有显示，而是我得到了一些占位符文本。
这是我用来显示表格的代码。我在项目中安装了 Material 表和 Material 图标。

class RegistrationList extends Component {
  state = {
    registrations: [],
  };

  infoButtonHandler(id) {}

  componentDidMount() {
    axios.get("http://localhost:3030/api/items").then((res) => {
      let registrations = [];
      res.data.forEach((registration) => {
        let childeren = "";
        for (let i = 0; i < registration.childeren.length; i++) {
          childeren += registration.childeren[i].name;
          if (i + 1 !== registration.childeren.length) {
            childeren += ", ";
          }
        }
        registrations.push({
          _id: registration._id,
          name: registration.name,
          childeren: childeren,
          street: registration.street,
          houseNumber: registration.houseNumber,
          city: registration.city,
          postalCode: registration.postalCode,
        });
      });
      this.setState({ registrations: registrations });
    });
  }

  rowClickedHandler(rowData) {
    this.props.history.push("/RegistrationDetail/" + rowData._id);
  }

  render() {
    let table = (
      <MaterialTable
        title="Overzicht"
        columns={[
          { title: "familienaam", field: "name" },
          { title: "kinderen", field: "childeren" },
          { title: "dorp", field: "city" },
          { title: "postcode", field: "postalCode" },
          { title: "straat", field: "street" },
          { title: "nr.", field: "houseNumber" },
        ]}
        data={this.state.registrations}
        options={{
          search: true,
        }}
        onRowClick={(event, rowData) => this.rowClickedHandler(rowData)}
      />
    );
    return <div>{table}</div>;
  }
}

Answer 1

它在网站上说要做什么material-table
添加 Material 图标
在 material-table 中使用图标有两种方法，一种是通过 html 导入 Material 图标字体，另一种是导入 Material 图标并使用 material-table icons 属性。
HTML

<link
  rel="stylesheet"
  href="https://fonts.googleapis.com/icon?family=Material+Icons"
/>

或者
导入 Material 图标
可以导入图标以在 Material 表中使用，从而比使用字体库更灵活地自定义 Material 表的外观和感觉。
使用 npm 安装 @material-ui/icons:

npm install @material-ui/icons --save

使用 yarn 安装@material-ui/icons:

yarn add @material-ui/icons

如果您的环境不支持 tree-shaking，则推荐的导入图标的方法如下:

import AddBox from "@material-ui/icons/AddBox";
import ArrowDownward from "@material-ui/icons/ArrowDownward";

如果您的环境支持 tree-shaking，您还可以通过以下方式导入图标:

import { AddBox, ArrowDownward } from "@material-ui/icons";

注意:以这种方式导入命名导出将导致项目中包含每个图标的代码，因此除非您配置 tree-shaking，否则不建议这样做。它也可能影响热模块重载性能。来源:@material-ui/icons
例子

import { forwardRef } from 'react';

import AddBox from '@material-ui/icons/AddBox';
import ArrowDownward from '@material-ui/icons/ArrowDownward';
import Check from '@material-ui/icons/Check';
import ChevronLeft from '@material-ui/icons/ChevronLeft';
import ChevronRight from '@material-ui/icons/ChevronRight';
import Clear from '@material-ui/icons/Clear';
import DeleteOutline from '@material-ui/icons/DeleteOutline';
import Edit from '@material-ui/icons/Edit';
import FilterList from '@material-ui/icons/FilterList';
import FirstPage from '@material-ui/icons/FirstPage';
import LastPage from '@material-ui/icons/LastPage';
import Remove from '@material-ui/icons/Remove';
import SaveAlt from '@material-ui/icons/SaveAlt';
import Search from '@material-ui/icons/Search';
import ViewColumn from '@material-ui/icons/ViewColumn';

const tableIcons = {
    Add: forwardRef((props, ref) => <AddBox {...props} ref={ref} />),
    Check: forwardRef((props, ref) => <Check {...props} ref={ref} />),
    Clear: forwardRef((props, ref) => <Clear {...props} ref={ref} />),
    Delete: forwardRef((props, ref) => <DeleteOutline {...props} ref={ref} />),
    DetailPanel: forwardRef((props, ref) => <ChevronRight {...props} ref={ref} />),
    Edit: forwardRef((props, ref) => <Edit {...props} ref={ref} />),
    Export: forwardRef((props, ref) => <SaveAlt {...props} ref={ref} />),
    Filter: forwardRef((props, ref) => <FilterList {...props} ref={ref} />),
    FirstPage: forwardRef((props, ref) => <FirstPage {...props} ref={ref} />),
    LastPage: forwardRef((props, ref) => <LastPage {...props} ref={ref} />),
    NextPage: forwardRef((props, ref) => <ChevronRight {...props} ref={ref} />),
    PreviousPage: forwardRef((props, ref) => <ChevronLeft {...props} ref={ref} />),
    ResetSearch: forwardRef((props, ref) => <Clear {...props} ref={ref} />),
    Search: forwardRef((props, ref) => <Search {...props} ref={ref} />),
    SortArrow: forwardRef((props, ref) => <ArrowDownward {...props} ref={ref} />),
    ThirdStateCheck: forwardRef((props, ref) => <Remove {...props} ref={ref} />),
    ViewColumn: forwardRef((props, ref) => <ViewColumn {...props} ref={ref} />)
  };

<MaterialTable
  icons={tableIcons}
  ...
/>