Antd 多选清除按钮

Question

下面是 antd 网站上关于创建多选选项的基本代码。我想要实现的是创建一个“清除”按钮。单击“清除”时，它将删除所有带有“x”的框，即 a10、b12 等。如何清除该框？

我不想使用allowClear，我想将其绑定到我自己的按钮

https://codesandbox.io/s/g0dec

const { Select } = antd;

const { Option } = Select;

const children = [];
for (let i = 10; i < 36; i++) {
  children.push(<Option key={i.toString(36) + i}>{i.toString(36) + i}</Option>);
}

function handleChange(value) {
  console.log(`selected ${value}`);
}

ReactDOM.render(
  <Select
    mode="multiple"
    style={{ width: '100%' }}
    placeholder="Please select"
    defaultValue={['a10', 'c12']}
    onChange={handleChange}
  >
    {children}
  </Select>,
  mountNode,
);

Answer 1

您可以通过制作Select受控组件来做到这一点。value这就是通过使用prop ofSelect和hook来做到这一点的方法useState。

import React, { useState } from "react";
import ReactDOM from "react-dom";
import "antd/dist/antd.css";
import "./index.css";
import { Select } from "antd";

const { Option } = Select;

const children = [];
for (let i = 10; i < 36; i++) {
  children.push(<Option key={i.toString(36) + i}>{i.toString(36) + i}</Option>);
}

const App = () => {
  const defaultValues = ["a10", "c12"];
  const [selectedValues, setSelectedValues] = useState(defaultValues);

  function handleChange(value) {
    console.log(`selected ${value}`);
    setSelectedValues(value);
  }

  const handleClear = () => {
    setSelectedValues([]);
  };

  return (
    <div>
      <Select
        mode="multiple"
        style={{ width: "100%" }}
        placeholder="Please select"
        defaultValue={selectedValues}
        onChange={handleChange}
        value={selectedValues}
      >
        {children}
      </Select>
      <span>
        <button onClick={handleClear}>Clear</button>
      </span>
    </div>
  );
};

ReactDOM.render(<App />, document.getElementById("container"));  

这里的工作示例：https ://codesandbox.io/s/inspiring-cherry-z6zh0