react-native - 在 React Native 的默认模式中模糊

Question

当默认模式打开时，我想模糊我的屏幕背景。

我找到了这个模糊库 https://github.com/react-native-community/react-native-blur

有没有人做到了？

我没有在模态上找到只有背景颜色的解决方案。

谢谢

Answer 1

您不需要使用任何库来实现这种模糊效果。下面是在 Modal 打开时模糊背景图像的代码。

{/*blurRadius is initially 0 and 4 when modal active more the blurradius more is blur effect of image*/}

import React, { Component } from 'react';

import {
  Modal,
  Button,
  View,
  Text,
  StyleSheet,
  ImageBackground,
} from 'react-native';

export default class App extends Component {
  state = {
    isVisible: false,
  };
  render() {
    return (
      <ImageBackground
        style={styles.container}
        blurRadius={this.state.isVisible ? 4 : 0}
        source={require('./bgimage.jpeg')}>
        <Modal
          animationType={'fade'}
          transparent={true}
          visible={this.state.isVisible}
          onRequestClose={() => {
            console.log('Modal has been closed.');
          }}>
          <View style={styles.modal}>
            <Text style={styles.text}>Modal is open!</Text>
            <Button
              title="Click To Close Modal"
              onPress={() => {
                this.setState({ isVisible: !this.state.isVisible });
              }}
            />
          </View>
        </Modal>

        <Button
          title="Click To Open Modal"
          onPress={() => {
            this.setState({ isVisible: true });
          }}
        />
      </ImageBackground>
    );
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
    backgroundColor: 'rgba(0,0,0,0.5)',
  },
  modal: {
    flex: 1,
    alignItems: 'center',
    justifyContent: 'center',
    backgroundColor: '#606070',
    margin: 50,
  },
  text: {
    color: '#3f2949',
    marginTop: 10,
  },
});