HarmonyOS 如何实现窗口状态栏沉浸式效果

let windowClass: window.Window | undefined = undefined; 
    windowStage.getMainWindow((err: BusinessError, data) => { 
      const errCode: number = err.code; 
      if (errCode) { 
        console.error('Failed to obtain the main window. Cause: ' + JSON.stringify(err)); 
        return; 
      } 
      windowClass = data; 
 
      //窗口全屏 
      let isLayoutFullScreen = true; 
      windowClass.setWindowLayoutFullScreen(isLayoutFullScreen) 
        .then(() => { 
          console.info('Succeeded in setting the window layout to full-screen mode.'); 
        }) 
        .catch((err: BusinessError) => { 
          console.error('Failed to set the window layout to full-screen mode. Cause:' + JSON.stringify(err)); 
        });