解释 openInsert() { this.insertdialogVisible = true; }, // 确认新增 async insert() { this.insertform.status = "未检修"; const { data: res } = await this.$http.post( "/ear/insert", this.insertform );

这是一段 Vue.js 代码，其中包含两个方法：openInsert 和 insert。openInsert 方法用于打开一个对话框，它将 this.insertdialogVisible 设为 true，从而显示出一个新增数据的表单。insert 方法则是用来提交新增数据的，它首先将 insertform 中的数据设置为“未检修”状态，然后通过 HTTP POST 请求将数据传递给后台 API，最终将 API 返回的数据保存到 res 变量中。

相关问题

// 下载器类 class Downloader { constructor(data, options) { this.data = data; this.options = options; this.item = null; this.onStart = null; this.onProgress = null; this.onCompleted = null; this.data.progress = 0; // 新增 progress 属性 this.data.status='pause';//true 表示 进度没有结束，继续下载 this.data.timeid=0; } start() { const win = BrowserWindow.getFocusedWindow(); this.options.onStarted = (item) => { this.item = item; this.data.status='process';//true 表示 进度没有结束，继续下载 this.onStart(); }; this.options.onTotalProgress=(progress)=>{ this.data.progress = progress.percent * 100; // 更新 progress 属性 this.onTotalProgress(progress); } this.options.onCompleted = () => { this.onCompleted(); }; download(win, this.data.dowloadLink, this.options); } pause() { if (this.item) { this.item.pause(); } } resume() { if (this.item) { this.item.resume(); } } cancel() { if (this.item) { this.item.cancel(); } } } 这是我说的类，里面有异步方法，怎么实现

你可以在异步方法执行完毕后，通过 Promise 或回调函数的方式通知外部代码。例如，在 onCompleted 回调函数中设置一个 Promise，然后在外部代码中等待这个 Promise 执行完毕，再执行下一步操作。类似下面这样：

class Downloader {
  constructor(data, options) {
    this.data = data;
    this.options = options;
    this.item = null;
    this.onStart = null;
    this.onProgress = null;
    this.onCompleted = null;
    this.data.progress = 0;
    this.data.status = 'pause';
    this.data.timeid = 0;
  }

  start() {
    const win = BrowserWindow.getFocusedWindow();
    this.options.onStarted = (item) => {
      this.item = item;
      this.data.status = 'process';
      this.onStart();
    };

    this.options.onTotalProgress = (progress) => {
      this.data.progress = progress.percent * 100;
      this.onTotalProgress(progress);
    };

    this.options.onCompleted = () => {
      this.onCompletedPromise.resolve(); // 执行 Promise
    };

    this.onCompletedPromise = {}; // 保存 Promise 对象
    this.onCompletedPromise.promise = new Promise((resolve, reject) => {
      this.onCompletedPromise.resolve = resolve;
      this.onCompletedPromise.reject = reject;
    });

    download(win, this.data.dowloadLink, this.options);
  }

  async pause() {
    if (this.item) {
      await this.onCompletedPromise; // 等待 Promise 执行完毕
      this.item.pause();
    }
  }

  async resume() {
    if (this.item) {
      await this.onCompletedPromise; // 等待 Promise 执行完毕
      this.item.resume();
    }
  }

  async cancel() {
    if (this.item) {
      await this.onCompletedPromise; // 等待 Promise 执行完毕
      this.item.cancel();
    }
  }
}

这样就能保证异步方法执行完毕后再执行外部代码了。

methods: { // 按钮点击事件 显示新增编辑弹窗组件 show() { this.addOrUpdateVisible = true; }, showAddOrUpdate(data) { if (data === "false") { this.addOrUpdateVisible = false; } else { this.addOrUpdateVisible = true; } }, // 确认删除 handleConfirm() { var params = this.id deleteCategory(params).then((res) => { if (res.data.state === '200') { this.$router.push({ path: "/" }); } }) }, // 接收路由跳转传来的id getId() { this.id = this.$route.query.id }, // 获取新的页数 getNewPage(val) { this.currentPage = val }, // 分页获取帖子 getArticleByPage() { var params = { currentPage: this.currentPage, pageSize: this.pagesize, categoryId: this.$route.query.id, source: this.source, parameter: this.parameter } getArticlePage(params).then((res) => { }) }, //路由跳转到帖子详情界面 Articli_detail(item) { this.$router.push({ path: "/articledetail", query: { id: item.id } }) }, // 置顶帖子 handleTop(item) { var params = { articleId: item.id, categoryId: this.$route.query.id, top: true } topArticle(params).then((res) => { }) }, }, watch: { currentPage() { this.getArticleByPage() } }, beforeCreated() { this.getNewPage() }, created() { this.getId() this.getArticleByPage() }, };请将代码用async和await改写

你可以使用async和await来改写这段代码。下面是改写后的代码：

methods: {
  show() {
    this.addOrUpdateVisible = true;
  },
  showAddOrUpdate(data) {
    if (data === "false") {
      this.addOrUpdateVisible = false;
    } else {
      this.addOrUpdateVisible = true;
    }
  },
  async handleConfirm() {
    var params = this.id;

    try {
      const res = await deleteCategory(params);
      if (res.data.state === '200') {
        this.$router.push({ path: "/" });
      }
    } catch (error) {
      console.error(error);
    }
  },
  getId() {
    this.id = this.$route.query.id;
  },
  getNewPage(val) {
    this.currentPage = val;
  },
  async getArticleByPage() {
    var params = {
      currentPage: this.currentPage,
      pageSize: this.pagesize,
      categoryId: this.$route.query.id,
      source: this.source,
      parameter: this.parameter
    };

    try {
      await getArticlePage(params);
    } catch (error) {
      console.error(error);
    }
  },
  Articli_detail(item) {
    this.$router.push({ path: "/articledetail", query: { id: item.id } });
  },
  async handleTop(item) {
    var params = {
      articleId: item.id,
      categoryId: this.$route.query.id,
      top: true
    };

    try {
      await topArticle(params);
    } catch (error) {
      console.error(error);
    }
  }
},
watch: {
  async currentPage() {
    await this.getArticleByPage();
  }
},
async beforeCreate() {
  await this.getNewPage();
},
async created() {
  await this.getId();
  await this.getArticleByPage();
}

通过将异步操作使用async和await包裹，并使用try-catch语句处理错误，可以更清晰地编写异步代码。同时，将beforeCreated和created生命周期钩子函数声明为async，并使用await等待异步操作完成。