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export default class AreaPicker extends Component {constructor() {super(...arguments)this.state = {addressJSON: address.addressJSON,multiIndex: [0, 0, 0],addressMulti: [],data: '',selectArea: '请选择所在地区'}// 绑定方法，（react有多种绑定的方法）this.onChange = this.onChange.bind(this)this.onColumnChange = this.onColumnChange.bind(this)}componentDidMount() {this.initAddress()}componentWillReceiveProps(nextProps) {this.setState({selectArea: nextProps.myAreas || '请选择所在地区'})}// 初始化城市JSON数据initAddress() {let addressMulti = [];let addressJSON = this.state.addressJSON;// 第一纬度（省）let ArrayOne = [];for (let key in addressJSON) {ArrayOne.push(key);};addressMulti.push(ArrayOne);// 第二纬度（市）let ArrayTwo = [];for (let key in addressJSON[ArrayOne[0]]) {ArrayTwo.push(key);};addressMulti.push(ArrayTwo);// 第三纬度（区）let ArrayThree = addressJSON[ArrayOne[0]][ArrayTwo[0]];addressMulti.push(ArrayThree);this.setState({addressMulti: addressMulti});}// 最后选择的地址onChange(e) {// e 的值返回的是一个数组，列如：[0, 0, 0]const { addressMulti, multiIndex } = this.statethis.setState({multiIndex: e.detail.value,selectArea: addressMulti[0][multiIndex[0]] + ' ' + addressMulti[1][multiIndex[1]] + ' ' + addressMulti[2][multiIndex[2]]});const myAreas = addressMulti[0][multiIndex[0]] + ' ' + addressMulti[1][multiIndex[1]] + ' ' + addressMulti[2][multiIndex[2]]const myAreas1 = addressMulti[0][multiIndex[0]] const myAreas2 = addressMulti[1][multiIndex[1]] const myAreas3 = addressMulti[2][multiIndex[2]]// 调用父组件传参this.props.onSelectArea(myAreas,myAreas1,myAreas2,myAreas3)}getKeyList(obj) {let keyList = [];if (obj) {for (let key in obj) {keyList.push(key);};};return keyList;}// 选择某个地址列表onColumnChange(e) {let data = {addressMulti: this.state.addressMulti,multiIndex: this.state.multiIndex};// column 指的是列data.multiIndex[e.detail.column] = e.detail.value;let keyOne = nulllet keyTwo = nullswitch (e.detail.column) {case 0:// 计算第二纬度keyOne = data.addressMulti[0][data.multiIndex[0]];data.addressMulti[1] = this.getKeyList(this.state.addressJSON[keyOne]);// 计算第三纬度keyTwo = data.addressMulti[1][0];data.addressMulti[2] = this.state.addressJSON[keyOne][keyTwo];data.multiIndex[1] = 0;data.multiIndex[2] = 0;break;case 1:// 计算第三纬度keyOne = data.addressMulti[0][data.multiIndex[0]];keyTwo = data.addressMulti[1][data.multiIndex[1]];data.addressMulti[2] = this.state.addressJSON[keyOne][keyTwo];data.multiIndex[2] = 0;break;}this.setState(data);}render() {const { addressMulti, multiIndex, selectArea } = this.statereturn (<View class="container"><Pickermode='multiSelector'onChange={this.onChange}onColumnChange={this.onColumnChange}value={multiIndex}range={addressMulti}><View class="picker">{selectArea}</View></Picker></View>)} 国内电商平台企业信息系统包括哪些供应链管理软件有哪些山东东营特大新闻房地产开发公司账务处理松原市新闻企业网站关键词优化百度平台我的订单全球仅2国零确诊北汽福田汽车股份有限公司中国新闻网官网企业网关app网站风格描述网络客服招聘在线设计艺术字建筑网络招聘小程序模板最近的国际新闻大事10条注册深圳公司的新规定网络营销策划方案的策划步骤有哪些全屋定制十大名牌排行2022关于电商行业的知识全球室内设计网站大全电子邮箱注册申请简约网页设计欣赏庆云网站seo怎么制作公众号头像免费业务网站建设厦门建设局局长陈锦良企业网站排名推广深圳优化seo