Antd 定制下拉框回显内容

效果图

import React from "react";
import ReactDOM from "react-dom";
import "antd/dist/antd.css";
import { TreeSelect } from "antd";const { TreeNode } = TreeSelect;class Demo extends React.Component {state = {values: [],titles: []};onChange = (values, titles, extra) => {console.log(values);this.setState({ values, titles });};render() {let { values, titles } = this.state;let placeholder = "";if (titles.length === 1) {placeholder = titles[0];} else {placeholder = `苏南${titles.length}市`;}return ({ width: "100%" }}dropdownStyle={{ maxHeight: 400, overflow: "auto" }}>{ marginLeft: -18 }} />{ marginLeft: -18 }} />{ marginLeft: -18 }} />);}
}ReactDOM.render(, document.getElementById("container"));

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