I see that someone made this for it: https://github.com/brentvatne/react-native-linear-gradient
But is there support for it in RN itself? Something like
style = StyleSheet.create({
backgroundGradient: "vertical",
backgroundGradientTop: "#333333",
backgroundGradientBottom: "#666666"
});
This question is related to
react-native
React Native hasn't provided the gradient color yet. But still, you can do it with a nmp package called react-native-linear-gradient
or you can click here for more info
npm install react-native-linear-gradient --save
import LinearGradient from 'react-native-linear-gradient';
in your application file
<LinearGradient colors={['#4c669f', '#3b5998', '#192f6a']}>
<Text>
Your Text Here
</Text>
</LinearGradient>
Here is a good choice for gradients for both platforms iOS and Android:
https://github.com/react-native-community/react-native-linear-gradient
There are others approaches like expo, however react-native-linear-gradient have worked better for me.
<LinearGradient colors={['#4c669f', '#3b5998', '#192f6a']} style={styles.linearGradient}>
<Text style={styles.buttonText}>
Sign in with Facebook
</Text>
</LinearGradient>
// Later on in your styles..
var styles = StyleSheet.create({
linearGradient: {
flex: 1,
paddingLeft: 15,
paddingRight: 15,
borderRadius: 5
},
buttonText: {
fontSize: 18,
fontFamily: 'Gill Sans',
textAlign: 'center',
margin: 10,
color: '#ffffff',
backgroundColor: 'transparent',
},
});
U can try this JS code.. https://snack.expo.io/r1v0LwZFb
import React, { Component } from 'react';
import { View } from 'react-native';
export default class App extends Component {
render() {
const gradientHeight=500;
const gradientBackground = 'purple';
const data = Array.from({ length: gradientHeight });
return (
<View style={{flex:1}}>
{data.map((_, i) => (
<View
key={i}
style={{
position: 'absolute',
backgroundColor: gradientBackground,
height: 1,
bottom: (gradientHeight - i),
right: 0,
left: 0,
zIndex: 2,
opacity: (1 / gradientHeight) * (i + 1)
}}
/>
))}
</View>
);
}
}
Just export your gradient as SVG and use it using react-native-svg
and when after you import your component set width and height and preserveAspectRatio="xMinYMin slice"
to scale an SVG gradient at your needs.
Looking for a similar solution I just came across this brand new tutorial, which lets you bridge a Swift gradient background (https://github.com/soffes/GradientView) library while walking through every step to get a working React component.
It is a step-by-step tutorial, allowing you to build your own component by bridging the swift and objective-c component into a usable React Native component, which overrides the standard View component and allows you to define a gradient like the following:
<LinearGradient
style={styles.gradient}
locations={[0, 1.0]}
colors={['#5ED2A0', '#339CB1']}
/>
You can find the tutorial here: http://browniefed.com/blog/2015/11/28/react-native-how-to-bridge-a-swift-view/
First, run npm install expo-linear-gradient --save
You don't need to use an animated tag, but this is what I was using in my code.
inside colors={[ put your gradient colors ]}
then you can use something like this:
import { LinearGradient } from "expo-linear-gradient";
import { Animated } from "react-native";
<AnimatedLinearGradient
colors={["rgba(255,255,255, 0)", "rgba(255,255,255, 1)"]}
style={{ your styles go here }}/>
const AnimatedLinearGradient = Animated.createAnimatedComponent(LinearGradient);
Here is a production ready pure JavaScript solution:
<View styles={{backgroundColor: `the main color you want`}}>
<Image source={`A white to transparent gradient png`}>
</View>
Here is the source code of a npm package using this solution: https://github.com/flyskywhy/react-native-smooth-slider/blob/0f18a8bf02e2d436503b9a8ba241440247ef1c44/src/Slider.js#L329
Here is the gradient palette screenshot of saturation and brightness using this npm package: https://github.com/flyskywhy/react-native-slider-color-picker
Source: Stackoverflow.com