import asset from '@ohos.security.asset'报错

let windowClass = null; 
//获取窗口 
windowStage.getMainWindow((err, data) => { 
  if (err.code) { 
    console.error('Failed to obtain the main window. Cause: ’ + JSON.stringify(err)); 
    return; 
  } 
  windowClass = data; 
  console.info('Succeeded in obtaining the main window. Data: ’ + JSON.stringify(data)); 
  //设置窗口全屏 
  windowClass.setWindowLayoutFullScreen(true) 
  let names = []; 
  //设置状态栏和导航栏不显示 
  windowClass.setWindowSystemBarEnable(names, (err) => { 
    if (err.code) { 
      console.error(‘Failed to set the system bar to be visible. Cause:’ + JSON.stringify(err)); 
      return; 
    } 
    console.info(‘Succeeded in setting the system bar to be visible.’); 
  }); 
})