title: Is there a way to change react navigation's default back button Color on IOS header?
body: <pre><code>static navigationOptions = {
      headerTitle:'Booking',
      headerTitleStyle: {color:'white'},
      headerStyle: {backgroundColor:'orange'}
    }
  </code></pre>
  
  <p>My header looks like this. I want to change the color of default back button icon on IOS. I can change the color of the title, but there's no option to change the color of icon. I was wondering if there's a way to change the color or implementing my own headerLeft property is a better option?</p>