title: How to know the state of scroll in FlatList?
body: <p>How to know the state of scroll in FlatList?
  Such as startScroll、Scrolling、endScroll</p>
  
  <pre><code>&lt;FlatList
      onScroll={(e) =&gt; { }}
  /&gt;
  </code></pre>
  
  <p>there is onScroll mothed,but it only run when Scrolling.
  I want to listen scroll start and end,how can i do ?</p>
  
  <p>I also tried use TouchableWithoutFeedback:</p>
  
  <pre><code>&lt;TouchableWithoutFeedback
      onPressIn={() =&gt; console.log('in')}
      onPressOut={() =&gt; console.log('out')}&gt;
      &lt;View&gt;&lt;FlatList/&gt;&lt;/View&gt;
  &lt;/TouchableWithoutFeedback&gt;
  </code></pre>
  
  <p>But touch events will be intercepted by TouchableWithoutFeedback,
  FlatList can't scroll.</p>