electron-dl 创建了一个类，用户管理多个下载器，但是我无法拿到每个下载器的进度条。 // 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; } start() { const win = BrowserWindow.getFocusedWindow(); this.options.onStarted = (item) => { this.item = item; if (this.onStart) { this.onStart(); } }; this.options.onProgress = (progress) => { if (this.onProgress) { this.onProgress(progress); } }; this.options.onCompleted = () => { if (this.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(); } } }

如果你想要获取每个下载器的进度条，你可以在 Downloader 类中添加一个 progress 属性，用于存储每个下载器的进度。然后在 onProgress 回调函数中更新该属性的值。这样，你就可以通过调用 Downloader 实例的 progress 属性来获取每个下载器的进度条了。以下是修改后的代码示例：

class Downloader {
  constructor(data, options) {
    this.data = data;
    this.options = options;
    this.item = null;
    this.onStart = null;
    this.onProgress = null;
    this.onCompleted = null;
    this.progress = 0; // 新增 progress 属性
  }

  start() {
    const win = BrowserWindow.getFocusedWindow();

    this.options.onStarted = (item) => {
      this.item = item;

      if (this.onStart) {
        this.onStart();
      }
    };

    this.options.onProgress = (progress) => {
      this.progress = progress; // 更新 progress 属性

      if (this.onProgress) {
        this.onProgress(progress);
      }
    };

    this.options.onCompleted = () => {
      if (this.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();
    }
  }
}