Redux-form Material-UI 下拉菜单不显示下拉菜单，选择答案

【问题标题】：Redux-form Material-UI dropdown not showing dropdown, selectionRedux-form Material-UI 下拉菜单不显示下拉菜单，选择
【发布时间】：2019-03-13 10:10:35
【问题描述】：

我使用 Material-ui select @material-ui/core/Select 和 redux-form 作为 HOC。我已创建表单并出现选择框，但未显示选项。

这是我的组件

import React from "react";
import { Field, reduxForm } from "redux-form";

import SelectField from "@material-ui/core/Select";
import MenuItem from "@material-ui/core/MenuItem";

const renderSelectField = ({
  input,
  label,
  meta: { touched, error },
  children,
  ...custom
}) => (
  <SelectField
    floatingLabelText={label}
    errorText={touched && error}
    {...input}
    onChange={(event, index, value) => input.onChange(value)}
    children={children}
    {...custom}
  />
);

const Form = props => {
  const { handleSubmit, pristine, reset, submitting } = props;
  return (
    <form onSubmit={handleSubmit}>
      <div>
        <Field
          name="favoriteColor"
          component={renderSelectField}
          label="Favorite Color"
        >
          <MenuItem value="1" primaryText="value 1" />
          <MenuItem value="2" primaryText="value 2" />
          <MenuItem value="3" primaryText="value 3" />
        </Field>
      </div>

      <div>
        <button type="submit" disabled={pristine || submitting}>
          Submit
        </button>
        <button type="button" disabled={pristine || submitting} onClick={reset}>
          Clear Values
        </button>
      </div>
    </form>
  );
};

export default reduxForm({
  form: "form" 
})(Form);

如下图所示单击此处的组合框选项时

我已经创建了一个代码沙盒实例 https://codesandbox.io/s/l2pqoryvvl?fontsize=14

【问题讨论】：

标签： reactjs material-ui redux-form

【解决方案1】：

只需将 MenuItems 更改为

  <MenuItem value="1">value 1</MenuItem>
  <MenuItem value="2">value 2</MenuItem>
  <MenuItem value="3">value 3</MenuItem>

菜单项不采用主要文本作为道具。

【讨论】：

【解决方案2】：

@S.Haviv 在我改变时提到过

<MenuItem value="1" text="value 1" /> 到 <MenuItem value='1'>value 1</MenuItem> 出现菜单项但点击不成功。所以我不得不去掉 Select 字段中的 onclick 处理程序我还为组件添加了一个标签

这是完整组件的代码 https://codesandbox.io/s/l2pqoryvvl?fontsize=14

import React from "react";
import { Field, reduxForm } from "redux-form";

import SelectField from "@material-ui/core/Select";
import MenuItem from "@material-ui/core/MenuItem";
import InputLabel from '@material-ui/core/InputLabel';
import FormControl from '@material-ui/core/FormControl';

const renderSelectField = ({
  input,
  label,
  meta: { touched, error },
  children,
  ...custom
}) => (
    <FormControl>
      <InputLabel >{label}</InputLabel>
      <SelectField
        floatingLabelText={label}
        errorText={touched && error}
        {...input}
        children={children}
        {...custom}
        />
    </FormControl>

  );

const Form = props => {
  const { handleSubmit, pristine, reset, submitting } = props;
  return (
    <form onSubmit={handleSubmit}>
      <div>
        <Field
          name="value"
          component={renderSelectField}
          label="Choose a Value"
          value="1"
        >
          <MenuItem value="1">value 1 </MenuItem>
          <MenuItem value="2">value 2 </MenuItem>
          <MenuItem value="3">value 3 </MenuItem>
        </Field>
      </div>

      <div>
        <button type="submit" disabled={pristine || submitting}>
          Submit
        </button>
        <button type="button" disabled={pristine || submitting} onClick={reset}>
          Clear Values
        </button>
      </div>
    </form>
  );
};

export default reduxForm({
  form: "form" // a unique identifier for this form
})(Form);

【讨论】：