React Native入门篇—react-native-image-picker的安装和使用

注意：未经允许不可私自转载，违者必究

React Native官方文档：https://reactnative.cn/docs/getting-started/

react-native-image-picker官方教程：https://github.com/react-native-community/react-native-image-picker

项目地址GitHub地址：https://github.com/zhouwei1994/nativeCase.git

 

安装react-native-image-picker

在项目目录下cmd里面运行以下命令：

yarn add react-native-image-picker

//关联原生
react-native link react-native-image-picker

Android原生配置

• 在项目目录android/app/src/main/AndroidManifest.xml文件中，进行以下添加 (以下配置有可以忽略):

• 在项目目录android/build.gradle文件中，查看是否有以下属性。没有添加进去：

buildscript {...}
allprojects {...}

/**
  + Project-wide Gradle configuration properties
  */
ext {
    compileSdkVersion   = 27
    targetSdkVersion    = 27
    buildToolsVersion   = "27.0.3"
}

• 对话框的自定义设置android/app/res/values/themes.xml（android/app/res/values/style.xml也是有效路径）：

选择型配置

react-native-image-picker使用

import React, { Component } from 'react';
import { ScrollView, StyleSheet, Text, View, PixelRatio, TouchableOpacity, Image } from 'react-native';
import ImagePicker from 'react-native-image-picker';
class ImagePickerPage extends Component {
    static navigationOptions = {
        title: '图片上传',
    };
    constructor(props) {
        super(props);
        this.state = {
            avatarSource: null,
            videoSource: null
        }
    }
    //选择图片
    selectPhotoTapped() {
        const options = {
            title: '选择图片',
            cancelButtonTitle: '取消',
            takePhotoButtonTitle: '拍照',
            chooseFromLibraryButtonTitle: '选择照片',
            customButtons: [
                { name: 'fb', title: '自定义选择' },
            ],
            cameraType: 'back',
            mediaType: 'photo',
            videoQuality: 'high',
            durationLimit: 10,
            maxWidth: 300,
            maxHeight: 300,
            quality: 0.8,
            angle: 0,
            allowsEditing: false,
            noData: false,
            storageOptions: {
                skipBackup: true
            }
        };

        ImagePicker.showImagePicker(options, (response) => {
            console.log('Response = ', response);
            if (response.didCancel) {
                console.log('用户取消了照片选择器');
            }
            else if (response.error) {
                console.log('ImagePicker错误: ', response.error);
            }
            else if (response.customButton) {
                console.log('用户点击自定义按钮: ', response.customButton);
            }
            else {
                let source = { uri: response.uri };
                // 您还可以使用data显示图像:
                // let source = { uri: 'data:image/jpeg;base64,' + response.data };

                this.setState({
                    avatarSource: source
                });
            }
        });
    }

    //选择视频
    selectVideoTapped() {
        const options = {

            title: '选择视频',
            cancelButtonTitle: '取消',
            takePhotoButtonTitle: '录制视频',
            chooseFromLibraryButtonTitle: '选择视频',
            mediaType: 'video',
            videoQuality: 'medium'
        };

        ImagePicker.showImagePicker(options, (response) => {
            console.log('Response = ', response);

            if (response.didCancel) {
                console.log('User cancelled video picker');
            }
            else if (response.error) {
                console.log('ImagePicker Error: ', response.error);
            }
            else if (response.customButton) {
                console.log('User tapped custom button: ', response.customButton);
            }
            else {
                this.setState({
                    videoSource: response.uri
                });
            }
        });
    }
    render() {
        return (
            
                DatePicker
                
                    
                        {this.state.avatarSource === null ? 选择照片 :
                            
                        }
                    
                

                
                    
                        选择视频
                    
                

                {this.state.videoSource &&
                    {this.state.videoSource}
                }
            
        );
    }
}
export default ImagePickerPage;
const styles = StyleSheet.create({
    pageStyle: {
        backgroundColor: '#f5f5f5',
    },
    container: {
        flex: 1,
        justifyContent: 'center',
        alignItems: 'center',
        backgroundColor: '#F5FCFF'
    },
    avatarContainer: {
        borderColor: '#9B9B9B',
        borderWidth: 1 / PixelRatio.get(),
        justifyContent: 'center',
        alignItems: 'center'
    },
    avatar: {
        borderRadius: 50,
        width: 100,
        height: 100
    }
});

示例图

IOS的配置，后续更新，本人目前还没尝试不敢乱写，各位小伙伴可以去看官方教程，官方教程写的还是很清楚的。

项目地址GitHub地址：https://github.com/zhouwei1994/nativeCase.git

注意：未经允许不可私自转载，违者必究