React Native 使用react-native-image-picker库实现图片上传功能

刺骨的言语ヽ痛彻心扉 2022-05-13 16:42 165阅读 0赞

# react-native-image-picker使用 #

1， 首先,安装下该插件。

npm install react-native-image-picker@latest --save
     
      
       1

2， 针对Android和iOS平台分别进行配置

\#\# android 平台配置

1，在android/settings.gradle文件中添加如下代码：

include ':react-native-image-picker'
    project(':react-native-image-picker').projectDir = new File(settingsDir, '../node_modules/react-native-image-picker/android')
     
      
       1
       2

2，在android/app/build.gradle文件的dependencies中添加如下代码：

compile project(':react-native-image-picker')
     
      
       1

3，在AndroidManifest.xml文件中添加权限：

<uses-permission android:name="android.permission.CAMERA" />
    <uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
     
      
       1
       2

4，最后在MainApplication.Java文件中添加如下代码：

import com.imagepicker.ImagePickerPackage;
     new ImagePickerPackage()
     
      
       1
       2

这样Android环境就配置好了。

## iOS平台配置 ##

1，打开Xcode打开项目,点击根目录,右键选择　Add Files to ‘XXX’,选中项目中的该路径下的文件即可:node\_modules -> react-native-image-picker -> ios -> select RNImagePicker.xcodeproj  
![这里写图片描述][SouthEast]

2，添加成功后使用link命令：react-native link react-native-image-picker 。  
3，打开项目依次使用Build Phases -> Link Binary With Libraries将RNImagePicker.a添加到项目依赖。  
![这里写图片描述][SouthEast 1]  
4，对于iOS 10+设备，需要在info.plist中配置NSPhotoLibraryUsageDescription和NSCameraUsageDescription。  
![这里写图片描述][SouthEast 2]

## react-native-image-picker示例 ##

为了项目使用的方便，我们将其封装为一个组件CameraButton.js。代码如下：

import React from 'react'
    import {
        TouchableOpacity,
        StyleSheet,
        Platform,
        ActivityIndicator,
        View,
        Text,
        ToastAndroid
    } from 'react-native'
    
    var ImagePicker = require('react-native-image-picker');
    import Icon from 'react-native-vector-icons/Ionicons';
    
    const options = {
        title: '选择图片', 
        cancelButtonTitle: '取消',
        takePhotoButtonTitle: '拍照', 
        chooseFromLibraryButtonTitle: '图片库', 
        cameraType: 'back',
        mediaType: 'photo',
        videoQuality: 'high', 
        durationLimit: 10,
        maxWidth: 600,
        maxHeight: 600,
        aspectX: 2, 
        aspectY: 1,
        quality: 0.8,
        angle: 0,
        allowsEditing: false,
        noData: false,
        storageOptions: { 
            skipBackup: true, 
            path: 'images'
        }
    };
    
    class CameraButton extends React.Component { 
        constructor(props){
            super(props);
            this.state = {
                loading:false
            }
        }
        render() {
            const {photos,type} = this.props;
            let conText;
            if(photos.length > 0){
                conText = (<View style={styles.countBox}>
                    <Text style={styles.count}>{photos.length}</Text>
                </View>);
            }
            return (
                <TouchableOpacity
                    onPress={
       this.showImagePicker.bind(this)}
                    style={[this.props.style,styles.cameraBtn]}>
                    <View>
                        <Icon name="md-camera" color="#aaa" size={
       34}/>
                        {conText}
                    </View>
                </TouchableOpacity>
            )
        }
    
        showImagePicker() {
            ImagePicker.showImagePicker(options, (response) => { if (response.didCancel) { console.log('User cancelled image picker'); } else if (response.error) { console.log('ImagePicker Error: ', response.error); } else { let source; if (Platform.OS === 'android') { source = {uri: response.uri, isStatic: true} } else { source = {uri: response.uri.replace('file://', ''), isStatic: true} } let file; if(Platform.OS === 'android'){ file = response.uri }else { file = response.uri.replace('file://', '') } this.setState({ loading:true }); this.props.onFileUpload(file,response.fileName||'未命名文件.jpg') .then(result=>{ this.setState({ loading:false }) }) } }); } } const styles = StyleSheet.create({ cameraBtn: { padding:5 }, count:{ color:'#fff', fontSize:12 }, fullBtn:{ justifyContent:'center', alignItems:'center', backgroundColor:'#fff' }, countBox:{ position:'absolute', right:-5, top:-5, alignItems:'center', backgroundColor:'#34A853', width:16, height:16, borderRadius:8, justifyContent:'center' } }); export default CameraButton;
     
      
       1
       2
       3
       4
       5
       6
       7
       8
       9
       10
       11
       12
       13
       14
       15
       16
       17
       18
       19
       20
       21
       22
       23
       24
       25
       26
       27
       28
       29
       30
       31
       32
       33
       34
       35
       36
       37
       38
       39
       40
       41
       42
       43
       44
       45
       46
       47
       48
       49
       50
       51
       52
       53
       54
       55
       56
       57
       58
       59
       60
       61
       62
       63
       64
       65
       66
       67
       68
       69
       70
       71
       72
       73
       74
       75
       76
       77
       78
       79
       80
       81
       82
       83
       84
       85
       86
       87
       88
       89
       90
       91
       92
       93
       94
       95
       96
       97
       98
       99
       100
       101
       102
       103
       104
       105
       106
       107
       108
       109
       110
       111
       112
       113
       114
       115
       116
       117
       118
       119
       120
       121
       122
       123
       124
       125
       126
       127
       128
       129
       130
       131
       132
       133
       134

然后在需要使用的地方引入。

import CameraButton from '../../component/huar/cameraButton'
    
    
                        <CameraButton style={styles.cameraBtn}
                                      photos={[]}
                                      onFileUpload={
       this.onFileUpload} />
    点击上传事件：
        onFileUpload(file, fileName){
            return this.props.uploadAvatar({
                id: this.props.user.ID,
                type:'logo',
                obj:'user',
                corpId: this.props.cropId
            }, file, fileName)｝
     Action请求代码：
    function actions(dispatch) { 
        return {
            fileUrl,fileName)=>dispatch(Actions.uploadAvatar(params, fileUrl,fileName))
        }
    }
     
      
       1
       2
       3
       4
       5
       6
       7
       8
       9
       10
       11
       12
       13
       14
       15
       16
       17
       18
       19
       20

actions中的uploadAvatar函数如下。

function uploadAvatar(params, fileUrl, fileName) { 
        return dispatch=> {
            return UserService.uploadImage(params, fileUrl, fileName)
                .then(result=> {
                    dispatch({
                        type: UPDATE_AVATAR,
                        path: result.path
                    })
                    return result
                })
        }
    }
     //UserService.uploadImage代码如下
    export function uploadImage(params, fileUrl,fileName) { 
        return http.uploadFile(`${config.UploadImage}`, params, fileUrl,fileName)
    }
     
      
       1
       2
       3
       4
       5
       6
       7
       8
       9
       10
       11
       12
       13
       14
       15
       16
       17

UserService函数的http异步上传图片代码如下：

### 封装上传 ###

如果上面的实现看的比较复杂，那么我们做如下的封装：

然后在使用的地方：

let params = {
        userId:'abc12345',   //用户id
        path:'file:///storage/emulated/0/Pictures/image.jpg'    //本地文件地址
    }
    uploadImage('app/uploadFile',params )
        .then( res=>{
            //请求成功
            if(res.header.statusCode == 'success'){
                //这里设定服务器返回的header中statusCode为success时数据返回成功
                upLoadImgUrl = res.body.imgurl;  //服务器返回的地址
            }else{
                 //服务器返回异常，设定服务器返回的异常信息保存在 header.msgArray[0].desc
                console.log(res.header.msgArray[0].desc); } }).catch( err=>{ //请求失败 })
     
      
       1
       2
       3
       4
       5
       6
       7
       8
       9
       10
       11
       12
       13
       14
       15
       16
       17

附：[http://lib.csdn.net/article/reactnative/58022?knId=1415][http_lib.csdn.net_article_reactnative_58022_knId_1415]  
[使用fetch+formData实现图片上传][fetch_formData]

[SouthEast]: /images/20220504/958f8557e8c84f768af37b56465228e3.png
[SouthEast 1]: /images/20220504/3c9496c57bf548ea9c132c1578f589ee.png
[SouthEast 2]: /images/20220504/194f4ad7f1dd427d9e915fc62a127c1c.png
[http_lib.csdn.net_article_reactnative_58022_knId_1415]: http://lib.csdn.net/article/reactnative/58022?knId=1415
[fetch_formData]: http://blog.csdn.net/withings/article/details/71363433