问题：

     实现ant.design form组件自定义主要是实现value接口，即能通过form.props直接获取组件的value

实现方案：

     this.props.onChange()方法，这个方法是组件经过getFieldDecorator包装后就会有的一个方法。通过该方法可以将自定义组件的值传递给form

代码实现

import React from 'react';
import {Form, Select} from 'antd';
import {formItemLayout} from './constants';
import MapBuilder from "./map";

const FormItem = Form.Item;

export default (field, form) => {
	const {getFieldDecorator} = form;

	// form.setFields({locations:'去2312'})
	return (
		<FormItem
			{...formItemLayout}
			id={field.id}
			key={field.id}
			label={field.label ? `${field.label}：` : ''}
			hasFeedback
		>
			{getFieldDecorator(field.id, {
				initialValue: field.defaultValue,
				rules: field.rules,
			})(
				<MapBuilder
					location={field.location} geo ={field.defaultValue}/>
			)}

		</FormItem>)
}

import React from 'react';
import querystring from 'querystring';
import {Base, Map, Marker,} from 'rc-bmap';

const {Point, Size, Events} = Base;
let center = [100.13, 15.35];
let _ = require('lodash');

export default class MapBuilder extends React.Component {

	constructor(props) {
		super(props);
		this.state = {
			point: [],
		};
		this.dragend = this.dragend.bind(this);
		this.getPoint = this.getPoint.bind(this);
	}

	componentWillMount() {
		if (this.props.location){
			// let geo =this.props.geo?this.props.geo.spli
			this.getPoint();
		}

	}

	componentDidUpdate(prevProps) {
		if (this.props.location != prevProps.location) {
			this.getPoint();
		}
	}

	getPoint() {
		const str = querystring.encode({
			code: 'utf-8',
			q: this.props.location,
		});
		fetch(`https://nominatim.openstreetmap.org/search?q=${str}&format=geocodejson`)
			.then(response => response.json())
			.then((body) => {
				if (body.features.length > 0) {
					this.props.onChange(body.features[0].geometry.coordinates);
					this.setState({point: [body.features[0].geometry.coordinates,]});
				}

			});
	}

	dragend(value) {
        //该操作会将值传给form
		this.props.onChange([value.point.lng, value.point.lat]);
	}

	getMakers() {

		let children = [];
		let point = this.state.point;
		if (!point || point.length < 1) {
			return children;
		}
		center = [point[0][0], point[0][1]];
		for (let i in point) {
			children.push(
				<Marker dragging>
					<Point lng={point[i][0]} lat={point[i][1]}/>
					<Events
						dragend={this.dragend}
					/>

				</Marker>
			)
		}
		return children;
	}

	render() {

		const children = this.getMakers();
		let zoom = 6;
		if (this.state.point && this.state.point.length > 0) {
			zoom = 9;
		}

		return (

			<div style={{height: 400}}>
				<Map
					ak="WAeVpuoSBH4NswS30GNbCRrlsmdGB5Gv"
					zoom={zoom}
					scrollWheelZoom
				>
					<Point name="center" lng={center[0]} lat={center[1]}/>
					{children}
				</Map>
			</div>
		)
	}
}
;