react-native-linear-gradient
A <LinearGradient>
component for react-native, as seen in
react-native-login.
Add it to your project
- Run
npm install react-native-linear-gradient --save
- Open your project in XCode, right click on
Libraries
and click `Add
Files to "Your Project Name" (Screenshot). - Add
libBVLinearGradient.a
to Build Phases -> Link Binary With Libraries
(Screenshot). - Click on
BVLinearGradient.xcodeproj
in Libraries
and go the Build Phases
tab. Double click the text to the right of Header Search Paths
and verify that it has $(SRCROOT)/../react-native/React
- if it
isn't, then add it. This is so XCode is able to find the headers that
the BVLinearGradient
source files are referring to by pointing to the
header files installed within the react-native
node_modules
directory. (Screenshot). - Whenever you want to use it within React code now you can:
var LinearGradient = require('react-native-linear-gradient');
Examples
Simple
The following code will produce something like this:
<LinearGradient colors={['#4c669f', '#3b5998', '#192f6a']} style={styles.linearGradient}>
<Text style={styles.buttonText}>
Sign in with Facebook
</Text>
</LinearGradient>
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',
},
});
Additional props
You can also use start and end points, as well as specify the locations
for the gradient color changes with the start
, end
and locations
props:
<LinearGradient
start={[0,0.25]} end={[0.5,1]}
locations={[0,0.5,0.6]}
colors={['#4c669f', '#3b5998', '#192f6a']}
style={styles.linearGradient}>
<Text style={styles.buttonText}>
Sign in with Facebook
</Text>
</LinearGradient>
Updating the values for fun
Check out [Examples/AnimatedGradient] (git clone
this project, cd into it, npm install, open in XCode and run) to see how this is done:
This gif was created using licecap - a great piece of free OSS
An example app
You can see this component in action in brentvatne/react-native-login.