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    @tuofeng/react-native-blur
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    3.2.4 • Public • Published

    npm version

    React Native Blur

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

    Content

    Installation

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

    1. Install package via npm:
    npm install react-native-blur
    
    1. Link your native dependencies:
    react-native link react-native-blur
    
    1. (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
        }
    }
    
    1. Include the library in your code:
    import { BlurView, VibrancyView } from 'react-native-blur';
    
    // OR
    
    const { BlurView, VibrancyView } = require('react-native-blur');
    1. Compile and have fun!

    BlurView

    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:

    import React, { Component } from 'react';
    import { View, Image, Text, findNodeHandle, StyleSheet } from 'react-native';
    import { BlurView } from 'react-native-blur';
    
    export default class Menu extends Component {
      constructor(props) {
        super(props);
        this.state = { viewRef: null };
      }
    
      imageLoaded() {
        this.setState({ viewRef: findNodeHandle(this.backgroundImage) });
      }
    
      render() {
        return (
          <View style={styles.container}>
            <Image
              ref={(img) => { this.backgroundImage = img; }}
              source={{uri}}
              style={styles.absolute}
              onLoadEnd={this.imageLoaded.bind(this)}
            />
            <BlurView
              style={styles.absolute}
              viewRef={this.state.viewRef}
              blurType="light"
              blurAmount={10}
            />
            <Text>Hi, I am some unblurred text</Text>
          </View>
        );
      }
    }
    
    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.

    VibrancyView

    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.)

    import { VibrancyView } from 'react-native-blur';
    
    export default class Menu extends Component {
      render() {
        return (
          <Image source={{uri}} style={styles.absolute}>
            <VibrancyView blurType="light" style={styles.flex}>
              <Text>Hi, I am some vibrant text.</Text>
            </VibrancyView>
          </Image>
        );
      }
    }

    Android

    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)

    Example React Native App

    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/react-native-blur.git
    
    1. cd to examples/Basic
    cd react-native-blur/examples/Basic
    
    1. Install dependencies
    npm install
    
    1. 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 react-native-blur for your tvOS application

    Run the Android app

    react-native run-android
    

    Troubleshooting

    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

    ...
    import com.cmcewen.blurview.BlurViewPackage;
    ...
    
    public class MainApplication extends Application implements ReactApplication {
    ...
        @Override
        protected List<ReactPackage> getPackages() {
          return Arrays.<ReactPackage>asList(
              new MainReactPackage(),
              new BlurViewPackage()
          );
        }
    ...
    }

    Questions?

    Feel free to contact me in twitter or create an issue

    Install

    npm i @tuofeng/react-native-blur

    DownloadsWeekly Downloads

    3

    Version

    3.2.4

    License

    MIT

    Unpacked Size

    58 kB

    Total Files

    31

    Last publish

    Collaborators

    • iwater