/**
 * Sample React Native App
 * https://github.com/facebook/react-native
 * @flow
 */
 
import React,{ Component } from 'react';
import {
  AppRegistry,StyleSheet,Image,Text,TouchableHighlight,View
} from 'react-native';
 
export default class ViewProject extends Component {
  render() {
    return (
      <View style={styles.container}>
         <Text style={styles.baseStyle}>
           我是60号字体
           <Text style={{fontWeight:'800'}}>
           {'\r\n'}我是加粗60号字体
           </Text>
        </Text>
      </View>
    );
  }
}
 
const styles = StyleSheet.create({
  container: {
    flex:1,justifyContent: 'center',alignItems:'center',backgroundColor:'white',},baseStyle:{
 fontSize:60,textAlign:'center',color:'black',textShadowOffset:{width:5,hegith:5},textShadowRadius:2,textShadowColor:'grey'
 }
});
AppRegistry.registerComponent('ViewProject',() => ViewProject);

定义阴影效果相关的三个样式键

textShadowOffset textShadowRadius textShadowColor