鸿蒙NEXT项目实战-百得知识库04

代码仓地址，大家记得点个star

IbestKnowTeach: 百得知识库基于鸿蒙NEXT稳定版实现的一款企业级开发项目案例。本案例涉及到多个鸿蒙相关技术知识点： 1、布局 2、配置文件 3、组件的封装和使用 4、路由的使用 5、请求响应拦截器的封装 6、位置服务 7、三方库的使用和封装 8、头像上传 9、应用软件更新等https://gitee.com/xt1314520/IbestKnowTeach

我的页面开发

设计图

需求分析

华为账号登录功能开发（需要真机）

注意：这个功能需要真机，所以东林在gitee代码仓里面的代码是普通账号密码登录得，没有使用华为账号登录

我们之前封装的响应拦截器里面有判断，根据接口返回的状态码判断是否有权限，如果没有权限会跳转到登录页面

我们也可以点击我的页面头像区域可以到登录页面

1、登录界面整体布局

从上到下的整体布局所以我们使用Column进行包裹组件,整体可以拆分出五块区域

2、刨去华为账号登录的代码

import { CommonConstant } from '../contants/CommonConstant';
import { router } from '@kit.ArkUI';
import { RouterConstant } from '../contants/RouterConstant';


@Entry
  @Component
  struct LoginPage {
    // 多选框状态
    @State multiSelectStatus: boolean = false


    build() {
      Column() {
        Column({ space: 15 }) {
          Image($r('app.media.app_icon'))
            .width($r('app.float.common_width_big')).aspectRatio(1)
            .borderRadius(15)
          Text($r('app.string.application_name'))
            .fontSize($r('app.float.common_font_size_huge'))
            .fontWeight(FontWeight.Medium)
          Text($r('app.string.app_description'))
            .fontSize($r('app.float.common_font_size_small'))
            .fontColor($r('app.color.common_gray'))
          // 用户协议和隐私协议
          Row() {
            Checkbox()
              .select($$this.multiSelectStatus)
              .width(18)
              .selectedColor("#FA6D1D")
            Text() {
              Span("已阅读并同意")
              Span(" 用户协议 ")
                .fontColor(Color.Black)
                .onClick(() => {
                  router.pushUrl({ url: RouterConstant.PAGE_USER_POLICY })
                })
              Span("和")
              Span(" 隐私政策 ")
                .fontColor(Color.Black)
                .onClick(() => {
                  router.pushUrl({ url: RouterConstant.PAGE_PRIVACY_POLICY })
                })
            }.fontSize($r('app.float.common_font_size_small'))
              .fontColor($r('app.color.common_gray'))
          }
        }.height('50%')
      }
      .padding($r('app.float.common_padding'))
        .height(CommonConstant.HEIGHT_FULL)
        .width(CommonConstant.WIDTH_FULL)
        .justifyContent(FlexAlign.Center)
        .backgroundImage($r('app.media.background'))
        .backgroundImageSize({ width: CommonConstant.WIDTH_FULL, height: CommonConstant.HEIGHT_FULL })
        .expandSafeArea([SafeAreaType.SYSTEM], [SafeAreaEdge.TOP])
    }
  }

3、集成华为账号登录

参考东林的鸿蒙应用开发-高级课里面有个章节叫华为账号服务

大概分为以下几个步骤

1、在AGC上创建项目和应用

2、本地创建应用工程

3、本地生成签名文件

4、将签名放在AGC上生成证书

5、复制Client_ID放在本地项目中

6、本地完成签名

import { LoginWithHuaweiIDButton, loginComponentManager } from '@kit.AccountKit';
import { BusinessError } from '@kit.BasicServicesKit';
import { CommonConstant } from '../contants/CommonConstant';
import { router } from '@kit.ArkUI';
import { RouterConstant } from '../contants/RouterConstant';
import { authentication } from '@kit.AccountKit';
import { util } from '@kit.ArkTS';
import { Logger } from '../utils/Logger';
import { showToast } from '../utils/Toast';
import userApi from '../api/UserApi';
import { PreferencesUtil } from '../utils/PreferencesUtil';

@Entry
  @Component
  struct LoginPage {
    // 多选框状态
    @State multiSelectStatus: boolean = false
    // 构造LoginWithHuaweiIDButton组件的控制器
    controller: loginComponentManager.LoginWithHuaweiIDButtonController =
    new loginComponentManager.LoginWithHuaweiIDButtonController()
    .onClickLoginWithHuaweiIDButton((error: BusinessError, response: loginComponentManager.HuaweiIDCredential) => {
      // 判断是否勾选用户协议和隐私政策
      if (!this.multiSelectStatus) {
        showToast('请勾选用户协议和隐私政策')
        return
      }
      if (error) {
        Logger.error(`Failed to onClickLoginWithHuaweiIDButton. Code: ${error.code}, message: ${error.message}`);
        showToast('华为账号登录失败')
        return;
      }
      // 登录成功
      if (response) {
        Logger.info('Succeeded in getting response.')
        // 创建授权请求，并设置参数
        const authRequest = new authentication.HuaweiIDProvider().createAuthorizationWithHuaweiIDRequest();
        // 获取头像昵称需要传如下scope
        authRequest.scopes = ['profile'];
        // 用户是否需要登录授权，该值为true且用户未登录或未授权时，会拉起用户登录或授权页面
        authRequest.forceAuthorization = true;
        // 用于防跨站点请求伪造
        authRequest.state = util.generateRandomUUID();
        // 执行授权请求
        try {
          const controller = new authentication.AuthenticationController(getContext(this));
          controller.executeRequest(authRequest).then((data) => {
            const authorizationWithHuaweiIDResponse = data as authentication.AuthorizationWithHuaweiIDResponse;
            const state = authorizationWithHuaweiIDResponse.state;
            if (state != undefined && authRequest.state != state) {
              Logger.error(`Failed to authorize. The state is different, response state: ${state}`);
              showToast('华为账号登录失败')
              return;
            }
            Logger.info('Succeeded in authentication.');
            const authorizationWithHuaweiIDCredential = authorizationWithHuaweiIDResponse.data!;
            // 头像
            const avatarUri = authorizationWithHuaweiIDCredential.avatarUri;
            // 昵称
            const nickName = authorizationWithHuaweiIDCredential.nickName;
            // 唯一id
            const unionID = authorizationWithHuaweiIDCredential.unionID;
            // 登录接口
            login(unionID, nickName, avatarUri)
          }).catch((err: BusinessError) => {
            showToast('华为账号登录失败')
              Logger.error(`Failed to auth. Code: ${err.code}, message: ${err.message}`);
            });
          } catch (error) {
            showToast('华为账号登录失败')
            Logger.error(`Failed to auth. Code: ${error.code}, message: ${error.message}`);
          }

        }
      });

  build() {
    Column() {
      Column({ space: 15 }) {
        Image($r('app.media.app_icon'))
          .width($r('app.float.common_width_big')).aspectRatio(1)
          .borderRadius(15)
        Text($r('app.string.application_name'))
          .fontSize($r('app.float.common_font_size_huge'))
          .fontWeight(FontWeight.Medium)
        Text($r('app.string.app_description'))
          .fontSize($r('app.float.common_font_size_small'))
          .fontColor($r('app.color.common_gray'))
        // 用户协议和隐私协议
        Row() {
          Checkbox()
            .select($$this.multiSelectStatus)
            .width(18)
            .selectedColor("#FA6D1D")
          Text() {
            Span("已阅读并同意")
            Span(" 用户协议 ")
              .fontColor(Color.Black)
              .onClick(() => {
                router.pushUrl({ url: RouterConstant.PAGE_USER_POLICY })
              })
            Span("和")
            Span(" 隐私政策 ")
              .fontColor(Color.Black)
              .onClick(() => {
                router.pushUrl({ url: RouterConstant.PAGE_PRIVACY_POLICY })
              })
          }.fontSize($r('app.float.common_font_size_small'))
          .fontColor($r('app.color.common_gray'))
        }
      }.height('50%')

      Column() {
        LoginWithHuaweiIDButton({
          params: {
            // LoginWithHuaweiIDButton支持的样式
            style: loginComponentManager.Style.BUTTON_RED,
            // 账号登录按钮在登录过程中展示加载态
            extraStyle: {
              buttonStyle: new loginComponentManager.ButtonStyle().loadingStyle({
                show: true
              })
            },
            // LoginWithHuaweiIDButton的边框圆角半径
            borderRadius: 24,
            // LoginWithHuaweiIDButton支持的登录类型
            loginType: loginComponentManager.LoginType.ID,
            // LoginWithHuaweiIDButton支持按钮的样式跟随系统深浅色模式切换
            supportDarkMode: true,
            // verifyPhoneNumber：如果华为账号用户在过去90天内未进行短信验证，是否拉起Account Kit提供的短信验证码页面
            verifyPhoneNumber: true,
          },
          controller: this.controller,
        })
      }.width('80%')
      .height(40)
    }
    .padding($r('app.float.common_padding'))
    .height(CommonConstant.HEIGHT_FULL)
    .width(CommonConstant.WIDTH_FULL)
    .justifyContent(FlexAlign.Center)
    .backgroundImage($r('app.media.background'))
    .backgroundImageSize({ width: CommonConstant.WIDTH_FULL, height: CommonConstant.HEIGHT_FULL })
    .expandSafeArea([SafeAreaType.SYSTEM], [SafeAreaEdge.TOP])
  }
}

/**
 * 登录
 * @param unionID
 * @param nickname
 * @param avatarUri
 */
async function login(unionID?: string, nickname?: string, avatarUri?: string) {
  if (!nickname) {
    nickname = '小得'
  }
  if (!avatarUri) {
    avatarUri =
      'https://upfile-drcn.platform.hicloud.com/DT4ISbQduGIF5Gz5g_Z9yg.PCj5oenfVYPRaeJp1REFEyac5ctfyoz-bD3L3k5cJTIDkrfDyewIkQaOAEoTWdgIxA_sJ0DD5RITPB85tfWAF7oquqQ6AvE4Jt8dIRUoyic4djriMA.112968985.jpg'
  }
  // 调用服务端登录
  const token = await userApi.userLogin({ unionId: unionID, nickname: nickname, avatarUri: avatarUri });
  // 如果token存在
  if (token) {
    AppStorage.setOrCreate(CommonConstant.TOKEN_NAME, token)
    PreferencesUtil.savaData(CommonConstant.PREFERENCES_NAME, CommonConstant.TOKEN_NAME, token)
    // 获取用户信息
    const userInfo = await userApi.getUserInfo();
    if (!userInfo) {
      showToast(CommonConstant.DEFAULT_LOGIN_ERROR)
    }
    // 存放用户数据
    AppStorage.setOrCreate(CommonConstant.USER_INFO, userInfo)
    PreferencesUtil.savaData(CommonConstant.PREFERENCES_NAME, CommonConstant.USER_INFO, JSON.stringify(userInfo))
    // 登录成功
    showToast('登录成功')
    // 回到首页
    router.pushUrl({
      url: RouterConstant.PAGE_INDEX, params: {
        "currentIndex": 0
      }
    })
  } else {
    showToast(CommonConstant.DEFAULT_LOGIN_ERROR)
  }
}

4、隐私和用户协议页面

新建两个Page页面，然后在resources/rawfile下面新建两个html文件

页面里面使用Web组件来包裹html文件

import { webview } from '@kit.ArkWeb'
import { CommonConstant } from '../contants/CommonConstant'

@Entry
  @Component
  struct PolicyPage {
    webViewController: webview.WebviewController = new webview.WebviewController

    build() {
      Navigation() {
        Web({
          src: $rawfile("PrivacyPolicy.html"),
          controller: this.webViewController
        })
      }
      .height(CommonConstant.HEIGHT_FULL)
        .width(CommonConstant.WIDTH_FULL)
        .title($r('app.string.privacy_policy'))
        .titleMode(NavigationTitleMode.Mini)
        .mode(NavigationMode.Stack)
        .expandSafeArea([SafeAreaType.SYSTEM], [SafeAreaEdge.TOP])
    }
  }

import { webview } from '@kit.ArkWeb'
import { CommonConstant } from '../contants/CommonConstant'

@Entry
  @Component
  struct UserPolicyPage {
    webViewController: webview.WebviewController = new webview.WebviewController

    build() {
      Navigation() {
        Web({
          src: $rawfile("UserPolicy.html"),
          controller: this.webViewController
        })
      }
      .height(CommonConstant.HEIGHT_FULL)
        .width(CommonConstant.WIDTH_FULL)
        .title($r('app.string.user_policy'))
        .titleMode(NavigationTitleMode.Mini)
        .mode(NavigationMode.Stack)
        .expandSafeArea([SafeAreaType.SYSTEM], [SafeAreaEdge.TOP])
    }
  }

5、编写用户接口方法

import http from '../request/Request'
import { LoginParam, UserInfo, UserNicknameUpdateParam } from './UserApi.type'

/**
 * 用户接口
 */
class UserApi {
  /**
   * 登录接口
   */
  userLogin = (data: LoginParam): Promise<string> => {
    return http.post('/v1/user/login', data)
  }
  /**
  * 获取用户信息
  */
  getUserInfo = (): Promise<UserInfo> => {
    return http.get('/v1/user/info')
  }
  /**
   * 修改用户昵称
   */
  editNickname = (data: UserNicknameUpdateParam) => {
    return http.post('/v1/user/editNickname', data)
  }
}

const userApi = new UserApi();

export default userApi as UserApi;

/**
 * 登录接口的传参
 */
export interface LoginParam {
  /**
   * 华为账号id
   */
  unionId?: string
  /**
   * 昵称
   */
  nickname?: string
  /**
   * 头像
   */
  avatarUri?: string
}


/**
 * 用户信息
 */
export interface UserInfo {
  /**
   * 用户id
   */
  id: number
  /**
  * 华为账号id
  */
  unionId: string
  /**
   * 昵称
   */
  nickname: string
  /**
   * 头像
   */
  avatarUri: string

}

/**
 * 修改用户昵称接口入参
 */
export interface UserNicknameUpdateParam {
  /**
   * 昵称
   */
  nickname: string
}

我的页面整体布局

设计图

需求分析

封装组件

1、标题组件

import { CommonConstant } from '../contants/CommonConstant'

@Component
  export struct TitleComponent {
    // 标题
    @Link title: string

    build() {
      Row() {
        Text(this.title)
          .fontSize($r('app.float.common_font_size_huge'))
          .fontWeight(FontWeight.Medium)
      }.width(CommonConstant.WIDTH_FULL)
        .margin({ top: 10, bottom: 20 })
    }
  }

2、导航组件

import { CommonConstant } from '../contants/CommonConstant'
import { FunctionBarData } from '../models/FunctionBarData'
import { router } from '@kit.ArkUI'
import { PreferencesUtil } from '../utils/PreferencesUtil'
import { RouterConstant } from '../contants/RouterConstant'
import { IBestButton, IBestDialog, IBestDialogUtil } from '@ibestservices/ibest-ui'
import feedbackInfoApi from '../api/FeedbackInfoApi'
import { showToast } from '../utils/Toast'
import { ApplicationCheckUtil } from '../utils/ApplicationCheckUtil'

@Component
  @Entry
  export struct FunctionBarComponent {
    @State functionBarData: FunctionBarData = {
      icon: '',
      text: '',
      router: '',
      eventType: ''
    }
    // 反馈信息
    @State inputValue: string = ''
    @State formInputError: boolean = false
    @State dialogVisible: boolean = false

    @Builder
    formInputContain() {
      Column() {
        TextInput({ 'placeholder': '请输入反馈意见,长度不能超过255字符' })
          .fontSize(14)
          .placeholderFont({ size: 14 })
          .onChange((value) => {
            this.inputValue = value;
            this.formInputError = false
          })
        if (this.formInputError) {
          Text('反馈意见不能为空')
            .width(CommonConstant.WIDTH_FULL)
            .textAlign(TextAlign.Start)
            .margin({
              top: 5,
              left: 5
            })
            .fontColor(Color.Red)
            .fontSize($r('app.float.common_font_size_small'))
            .transition({ type: TransitionType.Insert, opacity: 1 })
            .transition({ type: TransitionType.Delete, opacity: 0 })
        }

      }.width('90%').margin({ top: 15, bottom: 15 })
    }

    build() {
      Row() {
        IBestDialog({
          visible: $dialogVisible,
          title: "反馈意见",
          showCancelButton: true,
          defaultBuilder: (): void => this.formInputContain(),
          beforeClose: async (action) => {
            if (action === 'cancel') {
              return true
            }
            const valueLength = this.inputValue.trim().length;
            this.formInputError = !valueLength;
            if (!this.formInputError) {
              // 添加反馈内容
              await feedbackInfoApi.addFeedbackContent({ content: this.inputValue })
              // 更新用户个人信息
              showToast('添加反馈意见成功')
              this.inputValue = ''
              return true
            }
            return !this.formInputError
          }
        })

        Row({ space: 10 }) {
          if (this.functionBarData.icon != '') {
            Image(this.functionBarData.icon)
              .width(30).aspectRatio(1)
          }
          Text(this.functionBarData.text)
            .fontSize($r('app.float.common_font_size_medium'))
            .fontWeight(FontWeight.Normal)
        }

        Image($r('app.media.icon_arrow'))
          .width(15).aspectRatio(1)

      }
      .width(CommonConstant.WIDTH_FULL)
        .height($r('app.float.common_height_small'))
        .backgroundColor($r('app.color.common_white'))
        .padding(10)
        .justifyContent(FlexAlign.SpaceBetween)
        .borderRadius(5)
        .onClick(() => {
          if (this.functionBarData.router) {
        router.pushUrl({ url: this.functionBarData.router })
      } else if (this.functionBarData.eventType === 'logout') {
        // 退出登录
        logout()
      } else if (this.functionBarData.eventType === 'feedback') {
        // 点击反馈
        this.dialogVisible = true
      } else if (this.functionBarData.eventType === 'checkAppUpdate') {
        // 检查更新
        ApplicationCheckUtil.checkAppUpdate()
      }
    })
  }
}

/**
 * 退出登录
 */
function logout() {
  IBestDialogUtil.open({
    title: "提示",
    message: "是否确认退出登录？",
    showCancelButton: true,
    onConfirm: async () => {
      // 清除登录的缓存数据,userInfo有订阅者删不掉，所以重新赋值空的给userInfo
      AppStorage.setOrCreate(CommonConstant.USER_INFO, {
        nickname: '',
        unionId: '',
        avatarUri: '',
        id: 0
      })
      AppStorage.delete(CommonConstant.TOKEN_NAME)
      await PreferencesUtil.delAllData(CommonConstant.PREFERENCES_NAME, CommonConstant.TOKEN_NAME)
      await PreferencesUtil.delAllData(CommonConstant.PREFERENCES_NAME, CommonConstant.USER_INFO)
      router.clear()
      // 路由到我的页面
      router.replaceUrl({
        url: RouterConstant.PAGE_INDEX, params: {
          "currentIndex": 3
        }
      })
    }
  })
}

头像上传

1、编写工具类

import { common } from '@kit.AbilityKit';
import fs from '@ohos.file.fs';
import request from '@ohos.request';
import { BusinessError } from '@ohos.base';
import { picker } from '@kit.CoreFileKit';
import { Logger } from './Logger';
import { FileData } from '../models/FileData';

let context = getContext(this) as common.UIAbilityContext;
let filesDir = context.filesDir
let cacheDir = context.cacheDir

export class FileUtil {
  /**
   * 判断文件是否存在
   */
  static isExist(fileName: string, fileSuffix: string) {
    // 判断文件是否存在，存在就删除
    let path = filesDir + '/' + fileName + '.' + fileSuffix;
    if (fs.accessSync(path)) {
      fs.unlinkSync(path);
    }
  }

  /**
   * 下载文件
   */
  static downloadFile(fileName: string, fileSuffix: string, fileUrl: string): Promise<boolean> {
    return new Promise<boolean>((resolve, reject) => {
      // 判断文件是否已存在
      FileUtil.isExist(fileName, fileSuffix)
      request.downloadFile(context, {
        url: fileUrl,
        filePath: filesDir + '/' + fileName + '.' + fileSuffix
      }).then((downloadTask: request.DownloadTask) => {
        downloadTask.on('complete', () => {
          resolve(true)
        })
      }).catch((err: BusinessError) => {
        console.error(`Invoke downloadTask failed, code is ${err.code}, message is ${err.message}`);
        reject(err)
      });
    })
  }

  /**
   * 选择图片
   */
  static selectImage(): Promise<string> {
    return new Promise<string>((resolve, reject) => {
      try {
        let photoSelectOptions = new picker.PhotoSelectOptions();
        photoSelectOptions.MIMEType = picker.PhotoViewMIMETypes.IMAGE_TYPE;
        photoSelectOptions.maxSelectNumber = 1;
        let photoPicker = new picker.PhotoViewPicker(context);
        photoPicker.select(photoSelectOptions).then((photoSelectResult: picker.PhotoSelectResult) => {
          resolve(photoSelectResult.photoUris[0])
        }).catch((err: BusinessError) => {
          reject(err)
        });
      } catch (error) {
        let err: BusinessError = error as BusinessError;
        console.error('PhotoViewPicker failed with err: ' + JSON.stringify(err));
        reject(err)
      }
    })
  }


  /**
   * 将uri截取转换成固定类型
   */
  static convertFile(uri: string): FileData {
    // 将uri分割成字符串数组
    const array: string[] = uri.split('/');
    // 获取用户文件全名
    const fileFullName = array[array.length-1]
    // 获取文件名字里面.最后出现的索引位置
    let index = fileFullName.lastIndexOf(".");
    // 获取文件后缀名
    const fileSuffix = fileFullName.substring(index + 1)
    // 获取文件名
    const fileName = fileFullName.substring(0, index)
    // 封装文件数据
    const fileData: FileData = { fileFullName: fileFullName, fileSuffix: fileSuffix, fileName: fileName }
    return fileData
  }


  /**
   * 将用户文件转换成缓存目录
   */
  static copyUserFileToCache(uri: string, fileData: FileData): Promise<boolean> {
    return new Promise<boolean>((resolve, reject) => {
      // 缓存目录
      let cachePath = cacheDir + '/' + fileData.fileFullName
      try {
        let files = fs.openSync(uri, fs.OpenMode.READ_ONLY)
        fs.copyFileSync(files.fd, cachePath)
        resolve(true)
      } catch (error) {
        let err: BusinessError = error as BusinessError;
        Logger.error('Error copying file:' + JSON.stringify(err))
        reject(err)
      }
    })
  }
}

2、修改头像

/**
 * 修改头像
 */
async editAvatar() {
  try {
    // 头像上传
    const uri = await FileUtil.selectImage()
    if (!uri) {
      showToast("选择图片失败")
      return
    }
    // 将uri截取转换成固定类型
    const fileData = FileUtil.convertFile(uri)
    // 将用户文件转换成缓存目录
    const data = await FileUtil.copyUserFileToCache(uri, fileData)
    if (!data) {
      showToast("修改头像失败")
      return
    }
    // 上传文件
    await this.uploadImage(fileData)
  } catch (error) {
    showToast("修改头像失败")
  }

}

3、上传头像

/**
 * 上传图片
 */

async uploadImage(fileData: FileData) {
  let files: Array<request.File> = [
    // uri前缀internal://cache 对应cacheDir目录
    {
      filename: fileData.fileFullName,
      name: 'file', // 文件上传的key
      uri: 'internal://cache/' + fileData.fileFullName,
      type: fileData.fileSuffix
    }
  ]
  let uploadConfig: request.UploadConfig = {
    url: 'http://118.31.50.145:9003/v1/user/editAvatar',
    header: {
      "Authorization": AppStorage.get<string>("token")
    },
    method: 'POST',
    files: files,
    data: []
  }
  // 打开上传进度弹窗
  this.dialog.open()
  // 发送请求
  const response = await request.uploadFile(context, uploadConfig)
  // 监听上传进度
  response.on("progress", async (val, size) => {
    Logger.info("头像上传进度:", `${val / size * 100}%`)
    emitter.emit({ eventId: 100 }, { data: { process: `上传进度: ${(val / size * 100).toFixed(0)}%` } })
    if (val === size) {
      this.dialog.close()
      showToast('头像上传成功')
      // 获取用户信息
      const userInfo = await userApi.getUserInfo();
      this.userInfo = userInfo
      // 存放用户数据
      AppStorage.setOrCreate(CommonConstant.USER_INFO, userInfo)
      PreferencesUtil.savaData(CommonConstant.PREFERENCES_NAME, CommonConstant.USER_INFO,
                               JSON.stringify(userInfo))
    }
  })

}

4、自定义上传进度弹窗

// 自定义上传进度弹窗
dialog: CustomDialogController = new CustomDialogController({
  builder: ProgressDialog({ message: `上传进度: 0%` }),
  customStyle: true,
  alignment: DialogAlignment.Center
})

import { emitter } from '@kit.BasicServicesKit'

@CustomDialog
  export struct ProgressDialog {
    @State message: string = ''
    controller: CustomDialogController

    aboutToAppear(): void {
      emitter.on({ eventId: 100 }, (res) => {
        this.message = res.data!["process"]
      })
    }

    build() {
      Flex({ direction: FlexDirection.Row, alignItems: ItemAlign.Center, justifyContent: FlexAlign.Center }) {
        LoadingProgress().width(30).height(30).color($r('app.color.common_white'))
        if (this.message) {
          Text(this.message).fontSize((14)).fontColor($r('app.color.common_white'))
        }
      }
      .width($r('app.float.common_width_huge'))
        .height($r('app.float.common_height_small'))
        .padding(10)
        .backgroundColor('rgba(0,0,0,0.5)')
        .borderRadius(8)
    }
  }

Emitter具有同一进程不同线程间，或同一进程同一线程内，发送和处理事件的能力

Emitter用于同一进程内相同线程或不同线程间的事件处理，事件异步执行。使用时需要先订阅一个事件，然后发布该事件，发布完成后Emitter会将已发布的事件分发给订阅者，订阅者就会执行该事件订阅时设置的回调方法。当不需要订阅该事件时应及时取消订阅释放Emitter资源。

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检查更新

应用市场更新功能为开发者提供版本检测、显示更新提醒功能。开发者使用应用市场更新功能可以提醒用户及时更新到最新版本。

当应用启动完成或用户在应用中主动检查应用新版本时，开发者可以通过本服务，来查询应用是否有可更新的版本。如果存在可更新版本，您可以通过本服务为用户显示更新提醒。

应用调用检查更新接口。
升级服务API返回是否有新版本。
调用显示升级对话框接口。
升级服务API向应用返回显示结果。

import { updateManager } from '@kit.StoreKit';
import type { common } from '@kit.AbilityKit';
import { Logger } from './Logger';
import { showToast } from './Toast';

let context: common.UIAbilityContext = getContext() as common.UIAbilityContext;

export class ApplicationCheckUtil {
  /**
   * 检测新版本
   */
  static async checkAppUpdate() {
    try {
      const checkResult = await updateManager.checkAppUpdate(context);
      if (checkResult.updateAvailable === 0) {
        showToast('当前应用版本已经是最新');
        return;
      }
      // 存在新版本，显示更新对话框
      const resultCode = await updateManager.showUpdateDialog(context);
      if (resultCode === 1) {
        showToast("检查更新失败，请稍后重试，或者在我的界面直接点击反馈将信息反馈给开发者")
        return
      }
    } catch (error) {
      Logger.error('TAG', `检查更新出错: code is ${error.code}, message is ${error.message}`);
      showToast("检查更新失败，请稍后重试，或者在我的界面直接点击反馈将信息反馈给开发者")
    }
  }
}

退出登录

/**
 * 退出登录
 */
function logout() {
  IBestDialogUtil.open({
    title: "提示",
    message: "是否确认退出登录？",
    showCancelButton: true,
    onConfirm: async () => {
      // 清除登录的缓存数据,userInfo有订阅者删不掉，所以重新赋值空的给userInfo
      AppStorage.setOrCreate(CommonConstant.USER_INFO, {
        nickname: '',
        unionId: '',
        avatarUri: '',
        id: 0
      })
      AppStorage.delete(CommonConstant.TOKEN_NAME)
      await PreferencesUtil.delAllData(CommonConstant.PREFERENCES_NAME, CommonConstant.TOKEN_NAME)
      await PreferencesUtil.delAllData(CommonConstant.PREFERENCES_NAME, CommonConstant.USER_INFO)
      router.clear()
      // 路由到我的页面
      router.replaceUrl({
        url: RouterConstant.PAGE_INDEX, params: {
          "currentIndex": 3
        }
      })
    }
  })
}