如何实现全局dialog？

//utils.ets  
import promptAction from '@ohos.promptAction';  
import { BusinessError } from '@ohos.base';  
  
export function getDialog() {  
  try {  
    promptAction.showDialog({  
      title: 'Title Info',  
      message: 'Message Info',  
      buttons: [  
        {  
          text: 'button1',  
          color: '#000000'  
        },  
        {  
          text: 'button2',  
          color: '#000000'  
        }  
      ],  
    })  
      .then(data => {  
        console.info('showDialog success, click button: ' + data.index);  
      })  
      .catch((err: Error) => {  
        console.info('showDialog error: ' + err);  
      })  
  } catch (error) {  
    let message = (error as BusinessError).message  
    let code = (error as BusinessError).code  
    console.error(showDialog args error code is ${code}, message is ${message});  
  }  
}