React實現二級聯動的方法
本文實例為大傢分享瞭React實現二級聯動的具體代碼,供大傢參考,具體內容如下
實現效果: 普通h5頁,圖片我進行瞭裁剪,把用戶那部分刪掉瞭,不過也不影響說明
大體思路就是把數據接口從頁面傳給組件,交互在組件內執行後,通過onTimeChange將選擇的數據結果返回給頁面,然後展示到頁面上。
我用Taro寫的,語法和react一樣。
小程序效果
好久以前的一個方法,給大傢發下實現代碼:
1、頁面裡有一個選擇時間的彈框模塊
{this.state.isToggleOn && ( <Panel onTimeChange={this.onTimeChange} onClick={this.closeMask} list={this.state.timeList} //接口數據 status={this.state.status} //當前商品狀態,可以不加 /> )}
2、彈框裡
import { Component } from "@tarojs/taro"; import { View, Text } from "@tarojs/components"; import SendTime from "../time"; import "./index.scss"; export default class Panel extends Component { constructor(props) { super(props); } static defaultProps = { list: [], status: "" }; onClick() { this.props.onClick(); } onTimeChange(date, time) { this.props.onTimeChange(date, time); } render() { return ( <View className="panel-modal"> <SendTime list={this.props.list} onClick={this.onClick} onTimeChange={this.onTimeChange} status={this.props.status} /> </View> ); } }
3、time組件裡
import { Component } from "@tarojs/taro"; import { View, Text } from "@tarojs/components"; import { imageList } from "../../image"; import "./index.scss"; let dateNum = 0, timeNum = 0; export default class SendTime extends Component { constructor(props) { super(props); this.state = { dateNum: dateNum, timeNum: timeNum, timeList: [], }; } static defaultProps = { list: [], }; onClick() { this.props.onClick(); } switchDay(index, info) { this.setState({ dateNum: index, }); dateNum = index; this.switchTime(timeNum); let date = info ? info.date : ""; let time = info && info.timeSegementList ? info.timeSegementList[0] : ""; this.setState({ timeList: info.timeSegementList, }); this.onTimeChange(date, time); } switchTime(index) { let dateNum = this.state.dateNum; this.setState({ timeNum: index, }); timeNum = index; let date = this.props.list[dateNum] ? this.props.list[dateNum].date : ""; let time = this.props.list[dateNum] ? this.props.list[dateNum].timeSegementList[index] : ""; if (index != 0) { this.onTimeChange(date, time); } } onTimeChange(date, time) { this.props.onTimeChange(date, time); } componentWillMount() { this.setState({ timeList: ["成團後立即發貨"], }); } componentDidMount() { if (this.props.status) { this.switchDay(dateNum, this.props.list[dateNum]); } else { (dateNum = 0), (timeNum = 0); this.setState( { dataNum: 0, timeNum: 0, }, () => { this.switchDay(0, this.props.list[0]); } ); } } getClassName(index) { switch (index) { case this.state.dateNum: return "send-data-li current"; default: return "send-data-li"; } } render() { return ( <View> <View className="send-time-title" onClick={this.onClick}> <Text>送達時間</Text> <View className="close" /> </View> <View className="send-time-cont"> <View className="send-date-list"> {this.props.list.map((info, index) => ( <View key={index} className={ index === this.state.dateNum ? "send-data-li current" : "send-data-li" } onClick={this.switchDay.bind(this, index, info)} > <Text className="txt">{info ? info.date : ""}</Text> </View> ))} </View> <View className="send-r-time"> {this.state.timeList.map((info, index) => ( <View key={index} className={ index === this.state.timeNum ? "send-r-li current" : "send-r-li" } onClick={this.switchTime.bind(this, index)} > <View class="send-r-flex"> <Text class="txt">{info}</Text> <Image className="blue-ok" src={imageList.blueOk} mode={"aspectFit"} lazy-load={true} /> </View> </View> ))} </View> </View> </View> ); } }
以上就是本文的全部內容,希望對大傢的學習有所幫助,也希望大傢多多支持WalkonNet。