### ExampleFwyPage 代码

```jsx
import React, {Component} from 'react'
import './ExampleFwyPage.css'
import {GIS} from "iclient3d-plot-diy";
import {Button} from "antd";

;

export default class ExampleFwyPage extends Component {
    drawOps = [];

    constructor(props) {
        super(props);
        this.state = {
            htmlString: '<h3>正在加载中...</h3>',
        };
    }

    componentDidMount() {
        this.showData();

        fetch('./example/ExampleFwyPage.md')
            .then(response => response.text())
            .then(mdText => {
                this.setState({htmlString: window.marked.parse(mdText)});
            });
        //监听拨盘事件
    }

    showData() {

    }

    async draw() {
        let op = {
            useModify: true,
            type: "fwy",
            bjs: [100, 200, 300, 400, 500, 600]
        }
        let draw = await this.mapFunction.mapApiService.draw(op);
        this.drawOps.push(draw);
    }

    export() {
        let op = [];
        for (let d of this.drawOps) {
            let dd = this.mapFunction.mapApiService.exportDraw(d.code);
            op.push(dd);
        }
        console.log(op);
        alert(JSON.stringify(op));
    }


    render() {
        return (
            <div className={"example_fwy_container"}>
                <h3>方位圆</h3>
                <div className={"map_wrapper"}>
                    <GIS refs={
                        e => {
                            this.mapFunction = e
                        }
                    }
                         plotUrl={this.state.plotUrl}
                         mapRef={this}
                         showDefaultLayer={true}
                    />
                </div>
                <Button type="primary" onClick={() => this.draw()}>绘制方位圆</Button>
                <Button type="primary" onClick={() => this.export()}>导出数据</Button>
                <div className={"code_wrapper"}>
                    <div dangerouslySetInnerHTML={{__html: this.state.htmlString}}></div>
                </div>
            </div>
        )
    }
}



```