bug集

1. “Error: spawnSync /Users/UserName/Desktop/Path/node_modules/react-native/local-cli/setup_env.sh EACCES”出现以上问题，是当前目录权限问题，详细error如下：

child_process.js:506
    throw err;
    ^
Error: spawnSync /Users/UserName/Desktop/Path/node_modules/react-native/local-cli/setup_env.sh EACCES
    at exports._errnoException (util.js:1022:11)
    at spawnSync (child_process.js:461:20)
    at Object.execFileSync (child_process.js:498:13)
    at Object.run (/Users/UserName/Desktop/Path/node_modules/react-native/local-cli/cliEntry.js:156:16)
    at Object.<anonymous> (/usr/local/lib/node_modules/react-native-cli/index.js:117:7)
    at Module._compile (module.js:570:32)
    at Object.Module._extensions..js (module.js:579:10)
    at Module.load (module.js:487:32)
    at tryModuleLoad (module.js:446:12)
    at Function.Module._load (module.js:438:3)

解决办法：进入当前目录后，终端执行：

chmod -R 777 node_modules

node_modules是无权限目录。可根据自己未获得权限的目录下进行授权。

2. 运行react-native run-android的时候出现“ Could not install the app on the device, read the error above for details”，详细报错如下：

Could not install the app on the device, read the error above for details.
Make sure you have an Android emulator running or a device connected and have
set up your Android development environment:
https://facebook.github.io/react-native/docs/android-setup.html。

解决办法：除了可能是模拟器未安装好，或者环境变量配置有问题之外，（如果你之前其它的项目运行时没有问题的），那么可能就是没有权限的问题。只要在项目下运行就是为android文件夹下的gradlew命令 添加权限

chmod 755 android/gradlew

就可以。赶紧尝试一下。