react 自定义日历组件

基于hooks开发的自定义日历组件，可以根据自己需要修改；

index.tsx

import React, { useState } from "react";
import Taro from "@tarojs/taro";
import { View } from "@tarojs/components";
import { AtIcon } from 'taro-ui'
import './index.scss'
/**
 *  @author wangqiang;
 *  @create 2021-02-24;
 *  @update wangqiang(2021-02-24)
 *  @params searchBar => 搜索参数；  => 列表数据
 *  @description 修改请备注 location-grey
 */

const Main = (props) => {
    //每月多少天
    let MONTH_DAYS = [31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
    const WEEK_NAMES = ['日', '一', '二', '三', '四', '五', '六'];
    const LINES = [1, 2, 3, 4, 5, 6];
    const [year, setLoinsYear] = useState(0);
    const [month, seLoinstMonth] = useState(0);
    const [currentDate, setcurrentDate] = useState(new Date());
    const [tag, setTag] = useState(false);
    //获取当前月份
    const getMonth = (date: Date): number => {
        return date.getMonth();
    }
    //获取当前年份
    const getFullYear = (date: Date): number => {
        // console.log(date.getFullYear())
        return date.getFullYear();
    }

    const getCurrentMonthDays = (month: number, year: number): number => {
        let _year = year + currentDate.getFullYear();
        if(_year % 100 != 0 && _year % 4 == 0 || _year % 400 == 0){
            MONTH_DAYS = [31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31];
        }
        return MONTH_DAYS[month]
    }
    //当前月第一天是周几
    const getDateByYearMonth = (year: number, month: number, day: number = 1): Date => {
        var date = new Date()
        date.setFullYear(year)
        date.setMonth(month, day)
        return date
    }
    const getWeeksByFirstDay = (year: number, month: number): number => {
        var date = getDateByYearMonth(year, month)
        return date.getDay()
    }
    const getDayText = (line: number, weekIndex: number, weekDay: number, monthDays: number): any => {
        var number = line * 7 + weekIndex - weekDay + 1
        if (number <= 0 || number > monthDays) {
            return <View className="day-c" key={weekIndex}>&nbsp;</View>
        }
        return <View className="day-c" key={weekIndex}>
            <View className="day">{number}</View>
            <View className="desc">可约</View>
        </View>
    }

    const setCurrentYearMonth = (date) => {
        var month = getMonth(date)
        var year = getFullYear(date)
        setLoinsYear(year);
        seLoinstMonth(month)
        setTag(false)
    }

    const monthChange = (monthChanged: number) => {
        if (tag) {
            return;
        } else {
            setTag(true)
        }

        var monthAfter = month + monthChanged
        var date = getDateByYearMonth(year, monthAfter)
        setCurrentYearMonth(date)
    }
    const formatNumber = (num: number): string => {
        var _num = num + 1
        return _num < 10 ? `0${_num}` : `${_num}`
    }

    // let monthDays = getCurrentMonthDays(month);
    let weekDay = getWeeksByFirstDay(year, month);

    let _startX = 0;
    return <React.Fragment>
        <View className="loins-calendar"
            onTouchEnd={(val) => {
                if (_startX > val.changedTouches[0]['clientX'] + 30) {
                    monthChange(1);
                }
                if (_startX < val.changedTouches[0]['clientX'] - 30) {
                    monthChange(-1);
                }
            }} onTouchStart={(val) => {
                _startX = val.changedTouches[0]['clientX']

            }}
        >
            <View className="loins-calendar-tabbar">
                <View><AtIcon value='chevron-left' size='30' color='#297AF8' onClick={() => {
                    monthChange(-1);
                }}></AtIcon></View>
                <View className="loins-calendar-title">{year + currentDate.getFullYear()} 年 {formatNumber(month)}月</View>
                <View><AtIcon value='chevron-right' size='30' color='#297AF8' onClick={() => {
                    monthChange(1);
                }}></AtIcon></View>
            </View>
            {
                WEEK_NAMES.map((week, key) => {
                    return <View className="title-c" key={key}>{week}</View>
                })
            }
            {
                LINES.map((l, key) => {
                    return <View key={key} className="day-content">
                        {
                            WEEK_NAMES.map((week, index) => {
                                return getDayText(key, index, weekDay, getCurrentMonthDays(month, year))
                            })
                        }
                    </View>
                })
            }
        </View>
    </React.Fragment>
}
export default Main;

index.scss

.loins-calendar {
  background-color: #ffffff;
  &-tabbar {
    padding: 43px 100px 30px 100px;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
  &-title {
    font-size: 36px;
    font-family: Helvetica;
    color: #333333;
    line-height: 48px;
  }
  .title-c {
    display: inline-block;
    width: calc(100% / 7);
    text-align: center;
    font-size: 30px;
    font-weight: 400;
    color: #606060;
    line-height: 40px;
  }
  width: 100%;
  .day-content {
    text-align: center;
    .day-c {
      display: inline-block;
      width: calc(100% / 7);
      text-align: center;
      margin-bottom: 30px;
      .day {
        font-size: 32px;
        font-weight: 500;
        color: #303030;
        text-align: center;
      }
      .desc {
        height: 28px;
        font-size: 20px;
        font-weight: 400;
        color: #202020;
        text-align: center;
      }
    }
  }
}