rn-blur


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A component for UIVisualEffectView's blur and vibrancy effect on iOS, and 500px-android-blur on Android.

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- React Native Blur
- Content
- Installation
- BlurView
- VibrancyView
- Android
- Example React Native App
- Run the iOS app
- Run the tvOS app
- Run the Android app
- Troubleshooting
- Questions?

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NOTE: Latest version of the package is available in npm as rn-blur@3.0.0-alpha

1. Install package via npm:

``
npm install rn-blur
`

2. Link your native dependencies:
`
react-native link rn-blur
`

3. (Android only) Add the following to android/app/build.gradle

`
android {
// make sure to use 23.0.3 instead of 23.0.1
buildToolsVersion '23.0.3'

// ...
defaultConfig {
// Add these lines below the existing config
renderscriptTargetApi 23
renderscriptSupportModeEnabled true
}
}
`

4. Include the library in your code:

`javascript
import { BlurView, VibrancyView } from 'rn-blur';

// OR

const { BlurView, VibrancyView } = require('rn-blur');
`

5. Compile and have fun!

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Properties:

- blurType (String)
- xlight - extra light blur type
- light - light blur type
- dark - dark blur type
- extraDark - extra dark blur type (tvOS only)
- regular - regular blur type (tvOS only)
- prominent - prominent blur type (tvOS only)
- blurAmount (Default: 10, Number)
- 0-100 - Adjusts blur intensity

> Note: The maximum blurAmount on Android is 32, so higher values will be clamped to 32.

> Complete usage example that works on iOS and Android:

`javascript
import React, { Component } from 'react';
import { View, Image, Text, findNodeHandle, StyleSheet } from 'react-native';
import { BlurView } from 'rn-blur';

export default class Menu extends Component {
constructor(props) {
super(props);
this.state = { viewRef: null };
}

imageLoaded() {
this.setState({ viewRef: findNodeHandle(this.backgroundImage) });
}

render() {
return (

ref={(img) => { this.backgroundImage = img; }}
source={{uri}}
style={styles.absolute}
onLoadEnd={this.imageLoaded.bind(this)}
/>
style={styles.absolute}
viewRef={this.state.viewRef}
blurType="light"
blurAmount={10}
/>
Hi, I am some unblurred text

);
}
}

const styles = StyleSheet.create({
container: {
justifyContent: 'center',
alignItems: 'center',
},
absolute: {
position: "absolute",
top: 0, left: 0, bottom: 0, right: 0,
},
});
`

In this example, the Image component will be blurred, because the BlurView in positioned on top. But the Text will stay unblurred.

Note that viewRef is only required if you need to support Android. See the Android section for more details.

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Uses the same properties as BlurView (blurType and blurAmount).

> The vibrancy effect lets the content underneath a blurred view show through more vibrantly

> (Note: VibrancyView is only supported on iOS. Also note that the VibrancyView must contain nested views.)

`javascript
import { VibrancyView } from 'rn-blur';

export default class Menu extends Component {
render() {
return (


Hi, I am some vibrant text.


);
}
}
`

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Android uses the 500px-android-blur library, which works by blurring a referenced view. This means that you must wait until the view you want to blur is rendered. You then use findNodeHandle to get a reference to that view, and pass that reference to the BlurView as the viewRef prop. Take a look at the BlurView example to see how it works.

The Android library introduces some limitations:

* BlurView cannot be a child of the view that is being blurred (this would cause an infinite loop)
* BlurView cannot contain any child components.

If you only need to support iOS, then you can safely ignore these limitations.

In addition to blurType and blurAmount, Android has some extra props that can be used to override the default behavior (or configure Android-specific behavior):

- blurRadius (Number - between 0 and 25) - Manually adjust the blur radius. (Default: matches iOS blurAmount)
- downsampleFactor (Number - between 0 and 25) - Scales down the image before blurring (Default: matches iOS blurAmount)
- overlayColor (Color) - Set a custom overlay color (Default color based on iOS blurType)

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This project includes an example React Native app, which was used to make the GIF in this README.
You can run the apps by following these steps:

1. Clone the repository

`
cd ~
git clone https://github.com/react-native-community/rn-blur.git
`

2. cd to examples/Basic

`
cd rn-blur/examples/Basic
`

3. Install dependencies

`
npm install
`

4. Run the apps:

#### Run the iOS app

`
react-native run-ios
`

#### Run the tvOS app

type:
`
react-native run-ios
`

react-native link don’t works properly with the tvOS target so we need to add the library manually.

First select your project in Xcode.

After that, select the tvOS target of your application and select « General » tab

Scroll to « Linked Frameworks and Libraries » and tap on the + button

Select RNBlur-tvOS

That’s all, you can use rn-blur for your tvOS application

#### Run the Android app

`
react-native run-android
`

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On older instances of react-native, BlurView package does not get added into the MainActivity/MainApplication classes where you would see Warning: Native component for 'BlurView' does not exist in RN YellowBox or console.

To rectify this, you can add the BlurViewPackage manually in MainActivity/MainApplication classes
`java
...
import com.cmcewen.blurview.BlurViewPackage;
...

public class MainApplication extends Application implements ReactApplication {
...
@Override
protected List getPackages() {
return Arrays.asList(
new MainReactPackage(),
new BlurViewPackage()
);
}
...
}
``

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Feel free to contact me in twitter or create an issue