Unable to load script.Make sure you‘re either running a metro server（ run ‘react-native start‘ ） or that your bundle ‘index.android.bundle‘ is packaged correctly for release.

 

出现原因端口被占用

解决办法: 第一种, http://www.mamicode.com/info-detail-2727491.html

         第二种 关机重启，重新跑项目最直接