title: Big image inside ScrollView won't let scroll
body: <p>I'm trying to add an Image (by the image full size) into a <code>ScrollView</code> component, the idea is to let the image be on it's own size (without limiting it) but instead to let scroll horizontal and vertical (depend on the Image).
  so I'm using <code>Image.getSize()</code> for it inside a <code>ScrollView</code>, here is my component,</p>
  
  <pre><code>import React, { Component } from 'react';
  import { Image, ScrollView } from 'react-native';
  
  export default class App extends Component {
    constructor(props) {
      super(props);
      this.state = {
        width: 10,
        height: 10,
        image: 'http://www.francedimanche.fr/parole/wp-content/uploads/2017/08/Angelina-Jolie.png',
      }
    }
  
    componentDidMount() {
      Image.getSize(this.state.image, (width, height) =&gt; {
        this.setState({ width, height });
      });
    }
  
    render() {
      return (
        &lt;ScrollView&gt;
          &lt;Image
            style={{ width: this.state.width, height: this.state.height }}
            source={{uri: this.state.image}}
          /&gt;
        &lt;/ScrollView&gt;
      );
    }
  }
  </code></pre>
  
  <p>thanks!</p>