https://www.jianshu.com/p/1412cf0ab3e7

    1. // 引用官网的例子
    2. import LinearGradient from 'react-native-linear-gradient';
    3. // Within your render function
    4. <LinearGradient colors={['#4c669f', '#3b5998', '#192f6a']} style={styles.linearGradient}>
    5.   <Text style={styles.buttonText}>
    6.     Sign in with Facebook
    7.   </Text>
    8. </LinearGradient>
    10. // Later on in your styles..
    11. var styles = StyleSheet.create({
    12.   linearGradient: {
    13.     flex: 1,
    14.     paddingLeft: 15,
    15.     paddingRight: 15,
    16.     borderRadius: 5
    17.   },
    18.   buttonText: {
    19.     fontSize: 18,
    20.     fontFamily: 'Gill Sans',
    21.     textAlign: 'center',
    22.     margin: 10,
    23.     color: '#ffffff',
    24.     backgroundColor: 'transparent',
    25.   },
    26. });