学习React-native中遇到的错误

2017.12.14

• 红屏，一堆代码

  1. 摇晃设备，或者运行adb shell input keyevent 82，可以打开开发者菜单
  2. 点击进入Dev Settings
  3. 点击Debug server host for device
  4. 输入你电脑的IP地址和端口号（譬如10.0.1.1:8081）
  5. 回到开发者菜单然后选择Reload JS

• 手机白屏 日志信息：

  Couldn't connect to "ws://192.168.30.17:8081/message?device=SM-G9280%20-%206.0.1%20-%20API%2023&app=com.helloproject&clientid=DevSupportManagerImpl", will silently retry
  

  判断电脑的服务没有开启，检查端口信息：

  lsof -i:8081
  

  没有输出结果，说明服务没有启动。启动服务

  react-native start  
  # 报错
   ERROR  A non-recoverable condition has triggered.  Watchman needs your help!
  The triggering condition was at timestamp=1513216971: inotify-add-watch(/home/mrtan/react-native/HelloProject/android/.git/objects/9d) -> The user limit on the total number of inotify watches was reached; increase the fs.inotify.max_user_watches sysctl
  All requests will continue to fail with this message until you resolve
  the underlying problem.  You will find more information on fixing this at
  https://facebook.github.io/watchman/docs/troubleshooting.html#poison-inotify-add-watch
  # 报错显示 increase the fs.inotify.max_user_watches sysctl
  

  ss上的解决方案

  echo 256 | sudo tee -a /proc/sys/fs/inotify/max_user_instances
  echo 32768 | sudo tee -a /proc/sys/fs/inotify/max_queued_events
  echo 65536 | sudo tee -a /proc/sys/fs/inotify/max_user_watches
  
  watchman shutdown-server
  

  重启 react-native run-android