title: Navigation.navigate is not a function, navigation is undefined
body: <p>I have a problem, in React-Native.</p>
  <pre><code>&lt;Button title=&quot;Save&quot; onPress = {() =&gt; navigation.navigate('Save' , { image })}/&gt;
      {image &amp;&amp; &lt;Image source = {{uri: image}} style= {{flex: 1}}/&gt;}
      &lt;/View&gt;
    );
  }
  </code></pre>
  <p>I got an error:</p>
  <pre><code>navigation.navigate is not a function. (In 'navigation.navigate('Save', {image: image})', 'navigation.navigate' is undefined)
  </code></pre>