antd-DatePicker日期选择器

需求

1. 点击当日，一周，一个月，三个月，半年按钮，修改起始时间。
2. 用户可以自行选择时间。

在state中定义两个变量

1. dateStart：用来存储时间，渲染到页面
2. time：按钮

constructor(props) {super(props);this.state = {dateStart: now,time: ""}
}

具体实现

const nowTimeStamp = Date.now();
const now = new Date(nowTimeStamp);
let newDate = ""class MessageModify extends Component {constructor(props) {super(props);this.state = {dateStart: now,time: ""}}// formatDate日期格式化formatDate = (date) => {if (this.state.time === "") {const dateStr = `${date.getFullYear()}-${date.getMonth() + 1}-${date.getDate()}`;newDate = dateStrreturn `${dateStr}`;}else if (this.state.time === "当日") {const dateStr = `${now.getFullYear()}-${now.getMonth() + 1}-${now.getDate()}`;newDate = dateStrreturn `${dateStr}`;}else if (this.state.time === "近一周") {const qianyizhou = new Date(now-7*24*3600*1000)const dateStr = `${qianyizhou.getFullYear()}-${qianyizhou.getMonth() + 1}-${qianyizhou.getDate()}`newDate = dateStrreturn `${dateStr}`;} else if (this.state.time === "近一月") {const dateStr = `${now.getFullYear()}-${now.getMonth() + 1 -1}-${now.getDate()}`newDate = dateStrreturn `${dateStr}`;} else if (this.state.time === "近三月") {const dateStr = `${now.getFullYear()}-${now.getMonth() + 1 -3}-${now.getDate()}`newDate = dateStrreturn `${dateStr}`;} else if (this.state.time === "近半年") {const dateStr = `${now.getFullYear()}-${now.getMonth() + 1 -6}-${now.getDate()}`newDate = dateStrreturn `${dateStr}`;} }render() {return (<div><Button type="primary" onClick={() => this.setState({time: "当日"})}>当日</Button><Button type="primary" onClick={() => this.setState({time: "近一周"})}>近一周</Button><Button type="primary" onClick={() => this.setState({time: "近一月"})}>近一月</Button><Button type="primary" onClick={() => this.setState({time: "近三月"})}>近三月</Button><Button type="primary" onClick={() => this.setState({time: "近半年"})}>近半年</Button><div><div className="l-title">起始时间</div><div className="l-time am-list-item"><DatePickerminDate={new Date(2020,1,1,0,0,0)}maxDate={new Date(2022,1,1,0,0,0)}mode="date"title=""extra="Optional"value={this.state.dateStart}format={val => this.formatDate(val, "")}onChange={date => this.setState({dateStart: date, time: ""})} ><List.Item value={this.state.date}></List.Item></DatePicker></div></div></div>)}
}

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