如何解决首次打开APP偶现状态栏高度获取过高的问题

windowStage.loadContent('pages/Page4', (err, data) => { 
  if (err.code) { 
    hilog.error(0x0000, 'testTag', 'Failed to load the content. Cause: %{public}s', JSON.stringify(err) ?? ''); 
    return; 
  } 
  let mainWindow = windowStage.getMainWindowSync(); 
  mainWindow.setWindowLayoutFullScreen(true); 
  try { 
    mainWindow.on("avoidAreaChange", (data) => { 
      if (data.type === window.AvoidAreaType.TYPE_SYSTEM) { 
        let avoidHeight = data.area.topRect.height; 
        AppStorage.setOrCreate("topHeight", px2vp(avoidHeight)); 
      } 
    }) 
  } catch (exception) { 
    console.log(JSON.stringify(exception)) 
  } 
  let type = window.AvoidAreaType.TYPE_SYSTEM; 
  let avoidArea = mainWindow.getWindowAvoidArea(type); 
  let avoidHeight = avoidArea.topRect.height; 
  AppStorage.setOrCreate("topHeight", px2vp(avoidHeight)); 
 
  hilog.info(0x0000, 'testTag', 'Succeeded in loading the content. Data: %{public}s', JSON.stringify(data) ?? ''); 
})