Fix echarts overflow on Android

Author: wxsms

src/components/Echarts/index.js

@@ -1,5 +1,5 @@
 import React, { Component } from 'react';
-import { WebView, View, StyleSheet } from 'react-native';
+import { WebView, View, StyleSheet, Platform } from 'react-native';
 import renderChart from './renderChart';
 import echarts from './echarts.min';
 
@@ -21,7 +21,7 @@ export default class App extends Component {
             height: this.props.height || 400,
             backgroundColor: this.props.backgroundColor || 'transparent'
           }}
-          scalesPageToFit={true}
+          scalesPageToFit={Platform.OS !== 'ios'}
           source={require('./tpl.html')}
           onMessage={event => this.props.onPress ? this.props.onPress(JSON.parse(event.nativeEvent.data)) : null}
         />