创建react-native项目时出现命令行错误

Question

刚刚开始使用react-native项目，并试图设置演示项目来学习react-native。但是，我无法通过命令行创建项目。

我用下面的命令安装必备库后创建反应本地项目：

react-native init AwesomeProj 

我收到以下错误：

This will walk you through creating a new React Native project in /Users/ketanmalhotra/Documents/Freelance/demo-react/AwesomeProject 
Installing react-native... 
Consider installing yarn to make this faster: https://yarnpkg.com 
npm ERR! Darwin 16.3.0 
npm ERR! argv "/usr/local/Cellar/node/6.3.0/bin/node" "/usr/local/bin/npm" "install" "--save" "--save-exact" "react-native" 
npm ERR! node v6.3.0 
npm ERR! npm v3.10.3 
npm ERR! code ETIMEDOUT 
npm ERR! errno ETIMEDOUT 
npm ERR! syscall connect 

npm ERR! network connect ETIMEDOUT 151.101.36.162:443 
npm ERR! network This is most likely not a problem with npm itself 
npm ERR! network and is related to network connectivity. 
npm ERR! network In most cases you are behind a proxy or have bad network settings. 
npm ERR! network 
npm ERR! network If you are behind a proxy, please make sure that the 
npm ERR! network 'proxy' config is set properly. See: 'npm help config' 

npm ERR! Please include the following file with any support request: 
npm ERR!  /Users/ketanmalhotra/Documents/Freelance/demo-react/AwesomeProject/npm-debug.log 
{ Error: Command failed: npm install --save --save-exact react-native 
    at checkExecSyncError (child_process.js:475:13) 
    at execSync (child_process.js:515:13) 
    at run (/usr/local/lib/node_modules/react-native-cli/index.js:294:5) 
    at createProject (/usr/local/lib/node_modules/react-native-cli/index.js:249:3) 
    at /usr/local/lib/node_modules/react-native-cli/index.js:217:7 
    at /usr/local/lib/node_modules/react-native-cli/node_modules/prompt/lib/prompt.js:316:32 
    at /usr/local/lib/node_modules/react-native-cli/node_modules/async/lib/async.js:142:25 
    at assembler (/usr/local/lib/node_modules/react-native-cli/node_modules/prompt/lib/prompt.js:313:9) 
    at /usr/local/lib/node_modules/react-native-cli/node_modules/prompt/lib/prompt.js:322:32 
    at /usr/local/lib/node_modules/react-native-cli/node_modules/prompt/lib/prompt.js:597:5 
    error: null, 
    cmd: 'npm install --save --save-exact react-native', 
    file: '/bin/sh', 
    args: 
    [ '/bin/sh', 
    '-c', 
    'npm install --save --save-exact react-native' ], 
    options: 
    { stdio: [ [Object], [Object], [Object] ], 
    shell: true, 
    file: '/bin/sh', 
    args: 
     [ '/bin/sh', 
     '-c', 
     'npm install --save --save-exact react-native' ], 
    envPairs: 
     [ 'TERM_PROGRAM=Apple_Terminal', 
     'SHELL=/bin/bash', 
     'TERM=xterm-256color', 
     'TMPDIR=/var/folders/55/sqks2tv55flg67c1bbb2d9kh0000gn/T/', 
     'Apple_PubSub_Socket_Render=/private/tmp/com.apple.launchd.qiouajydN4/Render', 
     'TERM_PROGRAM_VERSION=388', 
     'OLDPWD=/Users/ketanmalhotra', 
     'TERM_SESSION_ID=473A481F-186B-4E05-B4D4-7A319C0F4D9F', 
     'USER=ketanmalhotra', 
     'SSH_AUTH_SOCK=/private/tmp/com.apple.launchd.rZIxxhyFU9/Listeners', 
     '__CF_USER_TEXT_ENCODING=0x1F5:0x0:0x0', 
     'PATH=/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin', 
     'PWD=/Users/ketanmalhotra/Documents/Freelance/demo-react', 
     'XPC_FLAGS=0x0', 
     'XPC_SERVICE_NAME=0', 
     'SHLVL=1', 
     'HOME=/Users/ketanmalhotra', 
     'LOGNAME=ketanmalhotra', 
     'LC_CTYPE=UTF-8', 
     'DISPLAY=/private/tmp/com.apple.launchd.3GdGOWMzei/org.macosforge.xquartz:0', 
     '_=/usr/local/bin/react-native' ] }, 
    envPairs: 
    [ 'TERM_PROGRAM=Apple_Terminal', 
    'SHELL=/bin/bash', 
    'TERM=xterm-256color', 
    'TMPDIR=/var/folders/55/sqks2tv55flg67c1bbb2d9kh0000gn/T/', 
    'Apple_PubSub_Socket_Render=/private/tmp/com.apple.launchd.qiouajydN4/Render', 
    'TERM_PROGRAM_VERSION=388', 
    'OLDPWD=/Users/ketanmalhotra', 
    'TERM_SESSION_ID=473A481F-186B-4E05-B4D4-7A319C0F4D9F', 
    'USER=ketanmalhotra', 
    'SSH_AUTH_SOCK=/private/tmp/com.apple.launchd.rZIxxhyFU9/Listeners', 
    '__CF_USER_TEXT_ENCODING=0x1F5:0x0:0x0', 
    'PATH=/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin', 
    'PWD=/Users/ketanmalhotra/Documents/Freelance/demo-react', 
    'XPC_FLAGS=0x0', 
    'XPC_SERVICE_NAME=0', 
    'SHLVL=1', 
    'HOME=/Users/ketanmalhotra', 
    'LOGNAME=ketanmalhotra', 
    'LC_CTYPE=UTF-8', 
    'DISPLAY=/private/tmp/com.apple.launchd.3GdGOWMzei/org.macosforge.xquartz:0', 
    '_=/usr/local/bin/react-native' ], 
    stderr: null, 
    stdout: null, 
    pid: 79752, 
    output: [ null, null, null ], 
    signal: null, 
    status: 1 } 
Command `npm install --save --save-exact react-native` failed. 

我试图找到一个解决这个问题但找不到任何有用的东西。任何人都知道如何解决这个问题？

P.S.我在Mac上这样做（如果这有什么区别）

Answer 1

我检查了互联网的问题，并ping的registry.npmjs.org和一切工作正常。为了解决这个问题，我使用以下命令安装了纱线：

brew install yarn 

似乎已经解决了这个问题。如果任何人在使用react-native开始时面临同样的问题，我会把它放在这里。