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基于HarmonyOS的宠物收养系统的设计与实现（一）

本系统是简易的宠物收养系统，为了更加熟练地掌握HarmonyOS相关技术的使用。

项目创建

创建一个空项目取名为PetApp

首页实现（组件导航使用）

官方文档：组件导航(Navigation)

实现目标效果：
5个工具选项，对应5个页面，点击工具栏在内容区切换子组件页面和标题

打开src/main/ets/pages 编辑Index.ets文件
Index.ets

import { AccountPage } from './AccountPage'
import { FavoritePage } from './FavoritePage'
import { HomePage } from './HomePage'
import { MapsPage } from './MapsPage'
import { MessagePage } from './MessagePage'@Entry
@Component
struct Index {private menuItem:NavigationMenuItem = {value:"",icon:"./images/list.png",action:()=>{}}private toolBarItemHome:ToolbarItem = {value:"Home",icon:"./images/home.png",action:()=>{this.pageName = "HomePage"this.title = "Home"}}private toolBarItemMaps:ToolbarItem = {value:"Maps",icon:"./images/maps.png",action:()=>{this.pageName = "MapsPage"this.title = "Maps"}}private toolBarItemFavorite:ToolbarItem = {value:"Favorite",icon:"./images/favorite.png",action:()=>{this.pageName = "FavoritePage"this.title = "Favorite"}}private toolBarItemMessage:ToolbarItem = {value:"Message",icon:"./images/message.png",action:()=>{this.pageName = "MessagePage"this.title = "Message"}}private toolBarItemAccount:ToolbarItem = {value:"Account",icon:"./images/account.png",action:()=>{this.pageName = "AccountPage"this.title = "Account"}}@State pageName:string = "HomePage";@State title:string = "Home"build() {Navigation(this.pageStack){if(this.pageName === 'HomePage'){HomePage()}else if(this.pageName === 'MapsPage'){MapsPage()}else if(this.pageName === 'FavoritePage'){FavoritePage()}else if(this.pageName === 'MessagePage'){MessagePage()}else {AccountPage()}}.titleMode(NavigationTitleMode.Mini)//标题模式.title(this.title)//设置标题.menus([this.menuItem])//设置顶部菜单.toolbarConfiguration([this.toolBarItemHome,this.toolBarItemMaps,this.toolBarItemFavorite,this.toolBarItemMessage,this.toolBarItemAccount])//底部工具栏}
}

添加首页 HomePage.ets

@Entry
@Component
export struct HomePage {build() {NavDestination(){Text("home")Text("home")Text("home")}}
}

添加地图页MapsPage.ets

@Entry
@Component
export struct MapsPage {build() {NavDestination(){Text("maps")Text("maps")Text("maps")}}
}

添加喜欢宠物页FavoritePage.ets

@Entry
@Component
export struct MapsPage {build() {NavDestination(){Text("maps")Text("maps")Text("maps")}}
}

添加消息页MessagePage.ets

@Entry
@Component
export struct MessagePage {build() {NavDestination(){Text("Message")Text("Message")Text("Message")}}
}

添加账号信息页AccountPage.ets

@Entry
@Component
export struct AccountPage {build() {NavDestination(){Text("Account")Text("Account")Text("Account")}}
}

实现效果

实现点击工具栏高亮

修改index.ets，添加changeState方法、activeIcon属性、status属性。

import { AccountPage } from './AccountPage'
import { FavoritePage } from './FavoritePage'
import { HomePage } from './HomePage'
import { MapsPage } from './MapsPage'
import { MessagePage } from './MessagePage'@Entry
@Component
struct Index {aboutToAppear(): void {this.changeState(0)}changeState(index:number){for(let i=0;i<this.toolBars.length;i++){this.toolBars[i].status=ToolbarItemStatus.NORMAL}this.toolBars[index].status = ToolbarItemStatus.ACTIVE}private menuItem:NavigationMenuItem = {value:"",icon:"./images/list.png",action:()=>{}}@State toolBarItemHome:ToolbarItem = {value:"Home",icon:"./images/home.png",activeIcon:"./images/home_a.png",action:()=>{this.pageName = "HomePage"this.title = "Home"this.changeState(0)}}@State toolBarItemMaps:ToolbarItem = {value:"Maps",icon:"./images/maps.png",status:ToolbarItemStatus.NORMAL,activeIcon:"./images/maps_a.png",action:()=>{this.pageName = "MapsPage"this.title = "Maps"this.changeState(1)}}@State toolBarItemFavorite:ToolbarItem = {value:"Favorite",icon:"./images/favorite.png",activeIcon:"./images/favorite_a.png",action:()=>{this.pageName = "FavoritePage"this.title = "Favorite"this.changeState(2)}}@State toolBarItemMessage:ToolbarItem = {value:"Message",icon:"./images/message.png",activeIcon:"./images/message_a.png",action:()=>{this.pageName = "MessagePage"this.title = "Message"this.changeState(3)}}@State toolBarItemAccount:ToolbarItem = {value:"Account",icon:"./images/account.png",activeIcon:"./images/account_a.png",action:()=>{this.pageName = "AccountPage"this.title = "Account"this.changeState(4)}}@State toolBars:ToolbarItem[] = [this.toolBarItemHome,this.toolBarItemMaps,this.toolBarItemFavorite,this.toolBarItemMessage,this.toolBarItemAccount];@State pageName:string = "HomePage";@State title:string = "Home"build() {Navigation(this.pageStack){if(this.pageName === 'HomePage'){HomePage()}else if(this.pageName === 'MapsPage'){MapsPage()}else if(this.pageName === 'FavoritePage'){FavoritePage()}else if(this.pageName === 'MessagePage'){MessagePage()}else {AccountPage()}}.titleMode(NavigationTitleMode.Mini)//标题模式.title(this.title)//设置标题.menus([this.menuItem])//设置顶部菜单.toolbarConfiguration(this.toolBars)//底部工具栏}
}

实现效果