fix ios e2e

playground/src/screens/ScrollViewScreen.js

 const React = require('react');
 const { Component } = require('react');
 
-const { StyleSheet, ScrollView, View, Button } = require('react-native');
+const { StyleSheet, ScrollView, View, Button, Platform } = require('react-native');
 
 const { Navigation } = require('react-native-navigation');
 const testIDs = require('../testIDs');
     return {
       topBar: {
         title: 'Collapse',
-        drawBehind: true,
+        ...Platform.select({
+          android: {
+            drawBehind: true
+          }
+        }),
         textColor: 'black',
         textFontSize: 16
       }