react-native 遇到的错误

记录下在react-native开发中遇到的错误

ReferenceError: Can't find variable: __fbBatchedBridge...

react-native启动用来做JavaScript的代码的服务，是本地的服务，App默认访问的host地址是localhost,运行到真实的设备上面的时候无法访问react-native服务,因此会出现上面的错误。

Android解决方案:

1. 对adb的server设置反向代理

adb reverse tcp:8081 tcp:8081

1. 更改App内的服务地址
    * 摇晃手机

 * 点击菜单键
 * 在电脑上面运行命令
   >adb shell input keyevent 82

在dev setting里面即可设置。
   

 ios解决方案:

 在AppDelegate.m中修改jsCodeLocation：
 `
 .....
 jsCodeLocation = [NSURL URLWithString:@"http://192.168.31.191:8081/index.ios.bundle?platform=ios&dev=true"];
 ....
 `

 

react-native start 错误

错误信息：

ERROR: Unknown option --no-pretty

ERROR: Unknown option --no-pretty

Watchman:  watchman--no-pretty get-sockname returned with exit code 1 ERROR: Unknown option --no-pretty

 ERROR  watchman--no-pretty get-sockname returned with exit code 1 ERROR: Unknown option --no-pretty

Error: watchman--no-pretty get-sockname returned with exit code 1 ERROR: Unknown option --no-pretty

    at ChildProcess.<anonymous> (.../fb-watchman/index.js:198:18)
    at emitTwo (events.js:106:13)
    at ChildProcess.emit (events.js:191:7)
    at maybeClose (internal/child_process.js:852:16)
    at Socket.<anonymous> (internal/child_process.js:323:11)
    at emitOne (events.js:96:13)
    at Socket.emit (events.js:188:7)
    at Pipe._handle.close [as _onclose] (net.js:492:12)

解决方法：
npm下面的包也有watchman,如果安装了先卸载

npm r -g watchman 

重新安装watchman:

brew uninstall watchman 
brew link pcre 
brew install --HEAD watchman

如果出现下面的提示错误:

Error: The `brew link` step did not complete successfully
brew link --overwrite watchman
......

直接运行命令:

brew link --overwrite watchman

出现Linking创建的信息:

Linking /usr/local/Cellar/watchman/HEAD-bbd5957... 4 symlinks created

如果出现权限不足的情况,可以运行命令:

sudo chown -R whoami /usr/local