准备用开发者手机写100个开源的demo不知道能不能实现，日拱一卒，期待蜕变。

第一个demo：日历，借鉴了网上的日历算法，自己用arkts写了界面和点击事件，各位可根据此demo写自己的日历选择器等组件。

1.目录结构：

2.主页代码

import common from '@ohos.app.ability.common'
import window from '@ohos.window'import { DataManager } from '../tools/DataManager'@Entry
@Component
struct Index {currentDate: Date = new Date()@State dataManager: DataManager = new DataManager(this.currentDate.getFullYear(),(this.currentDate.getMonth()+1),this.currentDate.getDate())private context = getContext(this) as common.UIAbilityContextscreenWidth: number = 480screenHeight: number = 853.33aboutToAppear() {// 获取屏幕的宽高window.getLastWindow(this.context).then((windowClass: window.Window) => {let windowProperties = windowClass.getWindowProperties()this.screenWidth = px2vp(windowProperties.windowRect.width)this.screenHeight = px2vp(windowProperties.windowRect.height)this.dataManager.initData()}).catch((error: Error) => {console.error('Failed to obtain the window size. Cause: ' + JSON.stringify(error))})}build() {Column() {Column() {Row(){Row(){Image($r('app.media.arrow_left_double')).height('60%').margin({left:20}).onClick(() => {this.dataManager.currentYear = this.dataManager.currentYear - 1this.dataManager.initData();})Image($r('app.media.arrow_left')).height('52%').margin({left:10}).onClick(() => {if(this.dataManager.currentMonth > 1){this.dataManager.currentMonth = this.dataManager.currentMonth - 1}else{this.dataManager.currentYear = this.dataManager.currentYear - 1this.dataManager.currentMonth = 12}this.dataManager.initData();})}.margin({top:8}).width('30%').height(((this.screenWidth-5*8)/7)).backgroundColor(0xF7F7F7)Text(this.dataManager.currentDateStr).height('100%').fontSize(((this.screenWidth-5*8)/7)/3).fontWeight(FontWeight.Bold)Row(){Image($r('app.media.arrow_right')).height('52%').margin({right:10}).onClick(() => {if(this.dataManager.currentMonth < 12){this.dataManager.currentMonth = this.dataManager.currentMonth + 1}else{this.dataManager.currentYear = this.dataManager.currentYear + 1this.dataManager.currentMonth = 1}this.dataManager.initData();})Image($r('app.media.arrow_right_double')).height('60%').margin({right:20}).onClick(() => {this.dataManager.currentYear = this.dataManager.currentYear + 1;this.dataManager.initData();})}.margin({top:8}).width('30%').height(((this.screenWidth-5*8)/7)).backgroundColor(0xF7F7F7).justifyContent(FlexAlign.End)}.width('100%').height(((this.screenWidth-5*8)/7)).backgroundColor(0xF7F7F7).justifyContent(FlexAlign.SpaceBetween)Grid() {ForEach(this.dataManager.week, (day: any) => {GridItem() {Text(day.text).fontSize(((this.screenWidth-5*8)/7)/3).fontColor(day.fontColor).backgroundColor(day.color).width('100%').height('100%').textAlign(TextAlign.Center).borderRadius(8)}.height("100%")}, day => day.id)}.columnsTemplate('1fr 1fr 1fr 1fr 1fr 1fr 1fr').rowsTemplate('1fr').backgroundColor(0xF7F7F7).columnsGap(5).rowsGap(5).height(((this.screenWidth-5*8)/7))Grid() {ForEach(this.dataManager.days, (day: any) => {GridItem() {Column() {Text(day.text).fontSize(((this.screenWidth - 5 * 8) / 7) / 3).fontColor(day.fontColor).width('100%').height('42%').margin({top:8}).textAlign(TextAlign.Center)Text(day.lunarText).fontSize(((this.screenWidth - 5 * 8) / 7) / 4).fontColor(day.lunarFontColor).width('100%').height('30%').textAlign(TextAlign.Center)}.borderRadius(day.borderRadius).backgroundColor(day.color).width('100%').height(((this.screenWidth-5*8)/7))}}, day => day.id)}.columnsTemplate('1fr 1fr 1fr 1fr 1fr 1fr 1fr').rowsTemplate(this.dataManager.rowsTemplate).columnsGap(5).rowsGap(5).height(((this.screenWidth-5*8)/7)*this.dataManager.rowsTemplateNumber).margin(5)}.width('100%').height('100%').backgroundColor('0xFFFFFF').borderRadius(8)}.width('100%').height('100%')}
}

3.显示效果

4.卡片显示（每晚00:01刷新）

5.源码地址

九流下半/openharmony_100_projects