#鸿蒙学习大百科#如何通过WindowStage创建一个子窗口?

// 创建子窗口
private createSubWindow(windowStage: window.WindowStage | null) {
  try {
    if (!windowStage) {
      return;
    }
    windowStage.createSubWindow('mySubWindow', (err: BusinessError, data) => {
      if (err.code) {
        console.error("Failed to create the subwindow, Cause: " + JSON.stringify(err));
        return;
      }
      this.subWindow = (data as window.Window);
      if (this.subWindow) {
        // 设置子窗口蒙层颜色
        this.initColor();
        // 设置子窗口可触
        this.subWindow.setWindowTouchable(true);
        // 设置窗口UI
        this.loadContent(entryName);
        // 展示子窗口
        this.showSubWindow();
      }
    });
  } catch (exception) {
    console.error("Failed to create the window, Cause: " + JSON.stringify(exception));
  }
}
/**
 * 设置子窗口蒙层颜色
 */
initColor() {
  try {
    // 获取指定resource对象对应的字符串
    this.maskColor = context.resourceManager.getStringSync($r('app.string.custom_dialog_mask_color').id);
    console.log("getStringSync: " + this.maskColor)
  } catch (err) {
    console.error(`getStringSync failed, code is ${err.code}, message is ${err.message}`);
  }
}
// 为当前WindowStage加载命名路由页面
private loadContent(path: string) {
  if (this.subWindow) {
    // TODO: 知识点: 用loadContentByName为当前窗口加载命名路由页面，通过LocalStorage传递状态属性给加载的页面
    this.subWindow.loadContentByName(path, this.Storage, (err: BusinessError) => {
      if (this.subWindow) {
        try {
          this.subWindow.setWindowBackgroundColor(this.maskColor);
        } catch (exception) {
          console.error('Failed to set the background color. Cause: ' + JSON.stringify(exception));
        };
      }
      if (err.code) {
        console.error("Failed to load the content. Cause:" + JSON.stringify(err));
        return;
      }
    });
  }
}