React Native - Port 8081 already

Port 8081 already in use

cd /Library/LaunchDaemons
sudo launchctl unload com.mcafee.agent.macmn.plist

参考链接:
https://stackoverflow.com/questions/30216417/react-native-port-8081-already-in-use-packager-is-either-not-running-or-not-r?answertab=oldest#tab-top

No bundle URL present

• react-native start //如果不行 尝试下方方法

• sudo launchctl remove com.mcafee.agent.macmn
  npm install //如果失败,可以尝试npm init先