如何获取窗口的宽高信息

import { window } from '@kit.ArkUI'; 
import { BusinessError } from '@kit.BasicServicesKit' 
 
let windowClass: window.Window | undefined = undefined; 
try { 
  let promise = window.getLastWindow(this.context); 
  promise.then((data)=> { 
    //获取窗口对象 
    windowClass = data; 
    try { 
      //获取窗口属性 
      let properties = windowClass.getWindowProperties(); 
      let rect = properties.windowRect; 
      //rect.width: 窗口宽度；rect.height: 窗口高度 
    } catch (exception) { 
      console.error('Failed to obtain the window properties. Cause: ' + JSON.stringify(exception)); 
    } 
    console.info('Succeeded in obtaining the top window. Data: ' + JSON.stringify(data)); 
  }).catch((err: BusinessError)=>{ 
    console.error('Failed to obtain the top window. Cause: ' + JSON.stringify(err)); 
  });} catch (exception) { 
  console.error('Failed to obtain the top window. Cause: ' + JSON.stringify(exception)); 
}