title: How to use React Native vector icons?
body: <p>I have just installed <a href="https://github.com/oblador/react-native-vector-icons" rel="noreferrer">React Native vector icons</a> with this comand:</p>
  
  <pre><code>npm install react-native-vector-icons
  </code></pre>
  
  <p>But if I use it in the index.android.js</p>
  
  <pre><code>&lt;Icon name="ios-add" size={30} color="#4F8EF7" /&gt;
  </code></pre>
  
  <p>I get a square with a X in the center instead of the icon.</p>
  
  <p>Why ?</p>
  
  <p>EDIT:</p>
  
  <p>If I try to install it with "npm install react-native-vector-icons --save", then I get this error:</p>
  
  <pre><code>C:\Users\xrobot\Desktop\React Native\AwesomeProject&gt;npm install react-native-vector-icons --save
  
      npm ERR! Windows_NT 10.0.14393
      npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "install" "react-native-vector-icons" "--save"
      npm ERR! node v6.9.5
      npm ERR! npm  v3.10.10
      npm ERR! path C:\Users\xrobot\Desktop\React Native\AwesomeProject\node_modules\.staging\react-native-vector-icons-73f301e7
      npm ERR! code EPERM
      npm ERR! errno -4048
      npm ERR! syscall rename
  
      npm ERR! Error: EPERM: operation not permitted, rename 'C:\Users\xrobot\Desktop\React Native\AwesomeProject\node_modules\.staging\react-native-vector-icons-73f301e7' -&gt; 'C:\Users\xrobot\Desktop\React Native\AwesomeProject\node_modules\react-native-vector-icons'
      npm ERR!     at destStatted (C:\Program Files\nodejs\node_modules\npm\lib\install\action\finalize.js:25:7)
      npm ERR!     at C:\Program Files\nodejs\node_modules\npm\node_modules\graceful-fs\polyfills.js:264:29
      npm ERR!     at FSReqWrap.oncomplete (fs.js:123:15)
      npm ERR!
      npm ERR! Error: EPERM: operation not permitted, rename 'C:\Users\xrobot\Desktop\React Native\AwesomeProject\node_modules\.staging\react-native-vector-icons-73f301e7' -&gt; 'C:\Users\xrobot\Desktop\React Native\AwesomeProject\node_modules\react-native-vector-icons'
      npm ERR!     at Error (native)
      npm ERR!  { Error: EPERM: operation not permitted, rename 'C:\Users\xrobot\Desktop\React Native\AwesomeProject\node_modules\.staging\react-native-vector-icons-73f301e7' -&gt; 'C:\Users\emiliano\Desktop\React Native\AwesomeProject\node_modules\react-native-vector-icons'
      npm ERR!     at destStatted (C:\Program Files\nodejs\node_modules\npm\lib\install\action\finalize.js:25:7)
      npm ERR!     at C:\Program Files\nodejs\node_modules\npm\node_modules\graceful-fs\polyfills.js:264:29
      npm ERR!     at FSReqWrap.oncomplete (fs.js:123:15)
      npm ERR!
      npm ERR! Error: EPERM: operation not permitted, rename 'C:\Users\emiliano\Desktop\React Native\AwesomeProject\node_modules\.staging\react-native-vector-icons-73f301e7' -&gt; 'C:\Users\xrobot\Desktop\React Native\AwesomeProject\node_modules\react-native-vector-icons'
      npm ERR!     at Error (native) parent: 'AwesomeProject' }
      npm ERR!
      npm ERR! Please try running this command again as root/Administrator.
  
      npm ERR! Please include the following file with any support request:
      npm ERR!     C:\Users\xrobot\Desktop\React Native\AwesomeProject\npm-debug.log
  
      C:\Users\xrobot\Desktop\React Native\AwesomeProject&gt;npm install react-native-vector-icons
      AwesomeProject@0.0.1 C:\Users\xrobot\Desktop\React Native\AwesomeProject
      `-- react-native-vector-icons@4.0.0
  </code></pre>
  
  <p>EDIT 2:</p>
  
  <pre><code>C:\Users\xrobot\Desktop\React Native\AwesomeProject&gt;react-native link react-native-vector-icons
  rnpm-install info Linking react-native-vector-icons android dependency
  rnpm-install info Android module react-native-vector-icons has been successfully linked
  rnpm-install info Linking react-native-vector-icons ios dependency
  rnpm-install info iOS module react-native-vector-icons has been successfully linked
  rnpm-install info Linking assets to ios project
  rnpm-install WARN ERRGROUP Group 'Resources' does not exist in your XCode project. We have created it automatically for you.
  rnpm-install info Linking assets to android project
  rnpm-install info Assets have been successfully linked to your project
  </code></pre>
  
  <p>EDIT 3:</p>
  
  <p>I have removed the app from the physical device and then I re-build it ( as QMFNP  said ). Now it works</p>