?? ????????????????????????:????
![](https://image.chezhanri.com/2019/0610/20190610150937233.png)
????:1?????:??????
2???????
3?????app
4?????????
5???????????
??????,?????????????????????????,????????????????“???????????”,??,?????????????????“????????????????????”????????????,?????????????,??????????????,????????????????????,?????????????,??,????,?????,???????????,????,???,?????????
???????????????????:?????????