react-native-linear-gradient
A <LinearGradient>
component for react-native, as seen in
react-native-login.
Version 1.3.0 supports react-native >= 0.16.0
Add it to your project
iOS
- 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"
Look under node_modules/react-native-linear-gradient
and add BVLinearGradient.xcodeproj
. (Screenshot). - Add
libBVLinearGradient.a
to Build Phases -> Link Binary With Libraries
(Screenshot). - Click on
BVLinearGradient.xcodeproj
in Libraries
and go the Build Settings
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');
If you're having trouble, you can point your package.json
at github to see if the issue has been fixed. Simply change the dependency "react-native-linear-gradient": "brentvatne/react-native-linear-gradient",
and then npm install
Android
-
in android/settings.gradle
include ':app', ':react-native-linear-gradient'
project(':react-native-linear-gradient').projectDir = new File(rootProject.projectDir, '../node_modules/react-native-linear-gradient/android')
-
in android/app/build.gradle
add:
dependencies {
...
compile project(':react-native-linear-gradient')
}
-
and finally, in android/src/main/java/com/{YOUR_APP_NAME}/MainActivity.java
add:
...
import com.BV.LinearGradient.LinearGradientPackage; // <--- This!
...
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
mReactRootView = new ReactRootView(this);
mReactInstanceManager = ReactInstanceManager.builder()
.setApplication(getApplication())
.setBundleAssetName("index.android.bundle")
.setJSMainModuleName("index.android")
.addPackage(new MainReactPackage())
.addPackage(new LinearGradientPackage()) // <---- and This!
.setUseDeveloperSupport(BuildConfig.DEBUG)
.setInitialLifecycleState(LifecycleState.RESUMED)
.build();
mReactRootView.startReactApplication(mReactInstanceManager, "SillyGoose", null);
setContentView(mReactRootView);
}
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, 0.25]} end={[0.5, 1.0]}
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.
License
License is MIT