如何在 React Native 中通过上传图片获取数据到 php 服务器

Question

我有一个 React Native 项目，它从文本输入中接收名称、电子邮件、phone 号码，然后将这些数据插入到 php 服务器 throw fetch api 并且它工作正常，但我需要让用户能够上传图片，当点击保存按钮时，所有数据（姓名、电子邮件、phone 号码、照片）保存到 php 服务器抛出 api，现在我使用 "react-native-image-picker" 并且工作正常，但我不知道如何使用表单数据上传带有数据抛出的图像 api。

这是本机反应代码：

 import React, { Component } from 'react';
import {View,Text,StyleSheet,TextInput,TouchableOpacity,Image} from 'react-native';
import ViewDataUsers from './ViewDataUsers';

import ImagePicker from 'react-native-image-picker';

const options={
    title:'select a photo',
    takePhotoButtonTitle:'Take a Photo',
    chooseFrmoLibraryButtonTitle:'Choose from Gallery',
    quality:1
};




class InputUsers extends Component{

//constructor have a state that conatains the properties that will recieve the values from Text Inputes 
    constructor(props){
       super(props) 
        this.state = {
            TextInputName:'',
            TextInputEmail:'',
            TextInputPhoneNumber:'',
            iamgeSource: null,
        }
    }

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

            if (response.didCancel) {
              console.log('User cancelled image picker');
            }
            else if (response.error) {
              console.log('ImagePicker Error: ', response.error);
            }
            else {
              let source = { uri: response.uri };
              this.setState({
                iamgeSource: source
              });
            }
          });
    }    

//arrow function that will fire when press on save button to save data in database via API
    InsertUser = ()=>{
        //constant varaibles that equal propertes in state
        const {TextInputName} = this.state;
        const {TextInputEmail} = this.state;
        const {TextInputPhoneNumber} = this.state;

        //API that use fetch to input data to database via backend php script
        fetch('http://192.168.1.7/tr_reactnative/insert.php',{
            method: 'POST',
            headers: {
                Accept: 'application/json',
                'Content-Type': 'application/json',
              },
              body: JSON.stringify({
                name : TextInputName,
                email: TextInputEmail,
                phone_number : TextInputPhoneNumber,
            })
          })
          .then((response) => response.json())
          .then((responseJson) => {
           // return responseJson  
             alert(responseJson);
             this.props.navigation.navigate('seconde');      
            })
            .catch((error) => {
                console.error(error);
              });

       //alert('Pressed!!'); 
        }


        ViewUsersList = ()=>{
            this.props.navigation.navigate('seconde');
        }


    render(){
        return(
            <View style ={styles.container}>
                <TextInput
                // value = {this.TextInputName}
                 placeholder = 'Enter Name'   
                 onChangeText = {TextInputValue=>this.setState({TextInputName:TextInputValue}) }  
                 underlineColorAndroid = 'transparent'
                 style = {styles.TextInputStyle}   
                />
                <TextInput
                 //value = {this.TextInputEmail}
                 placeholder = 'Enter E-mail'   
                 onChangeText = {TextInputValue=>this.setState({TextInputEmail:TextInputValue}) }  
                 underlineColorAndroid = 'transparent'
                 style = {styles.TextInputStyle2}   
                />

                <TextInput
                 //value = {this.TextInputPhoneNumber}
                 placeholder = 'Enter Phone Number'   
                 onChangeText = {TextInputValue=>this.setState({TextInputPhoneNumber:TextInputValue}) }  
                 underlineColorAndroid = 'transparent'
                 style = {styles.TextInputStyle2}   
                />

                <Image style={styles.image}
                    source={this.state.iamgeSource != null ? this.state.iamgeSource : require('./image/not_avilable.jpg')}
                />

                <TouchableOpacity style = {styles.TouchableOpacityStyle} onPress={this.selectPhoto.bind(this)}>
                    <Text style = {styles.TextStyle}>Select Photo</Text>
                </TouchableOpacity>        

                <TouchableOpacity activeOpacity = {.4} style = {styles.TouchableOpacityStyle} onPress={this.InsertUser}>
                    <Text style = {styles.TextStyle}>Save</Text> 
                </TouchableOpacity>


                <TouchableOpacity activeOpacity = {.4} style = {styles.TouchableOpacityStyle} onPress={this.ViewUsersList}>
                    <Text style = {styles.TextStyle}>View Users</Text> 
                </TouchableOpacity>
            </View>    
        )
    }
}

const styles = StyleSheet.create ({
    container : {
        alignItems:'center',
        flex:1,
        marginTop:5,
        backgroundColor:'#fff'
    },

    TextInputStyle :{
        textAlign:'center',
        marginBottom:7,
        width:'90%',
        height:40,
        borderWidth:1,
        borderRadius:5,
        borderColor:'#FF5722'    
    },

    TextInputStyle2 :{
        textAlign:'center',
        marginBottom:7,
        marginTop:20,
        width:'90%',
        height:40,
        borderWidth:1,
        borderRadius:5,
        borderColor:'#FF5722'    
    },

    TextStyle : {
        color:'#fff',
        textAlign:'center'
    },

    TouchableOpacityStyle:{
        paddingTop:10,
        paddingBottom:10,
        marginTop:20,
        borderRadius:5,
        marginBottom:7,
        width:'90%',
        backgroundColor:'#00BCD4'
    },

    button:{
        width:250,
        height:50,
        backgroundColor:"#330066"
    },

    text:{
        color:'white',
        fontSize:30,
        textAlign:'center'
    },

    image:{
        width:200,
        height:200,
        marginTop:30
    }

});

export default InputUsers;

这是 php 脚本：

<?php
    include 'connections.php';
    $json = file_get_contents('php://input');
    $obj = json_decode($json, true);

    $name = $obj['name'];
    $email = $obj['email'];
    $phone_number = $obj['phone_number'];

    if(mysqli_query($link, "INSERT INTO users(name,email, phone_number)VALUES('$name','$email','$phone_number')")){
        echo json_encode('Inserted succesfully');
    }else{
        echo json_encode('insert faild');
    }

    mysqli_close($link);

我需要将所有数据从应用程序发送到 php 服务器，包括用户在点击保存按钮时上传的图像，有帮助吗？

Answer 1

要上传您的照片，您必须使用 Formdata

InsertUser = ()=>{
    //constant variables that equal properties in state
    const {TextInputName} = this.state;
    const {TextInputEmail} = this.state;
    const {TextInputPhoneNumber} = this.state;
    const {iamgeSource} = this.state;

    const formData = new FormData();
    //Add your input data
    formData.append('name', TextInputName);
    formData.append('email', TextInputEmail);
    formData.append('phone_number', TextInputPhoneNumber);

    //Add your photo
    //this, retrive the file extension of your photo
    const uriPart = iamgeSource.split('.');
    const fileExtension = uriPart[uriPart.length - 1];

    formData.append('photo', {
        uri: iamgeSource,
        name: `photo.${fileExtension}`,
        type: `image/${fileExtension}`
    });

    //API that use fetch to input data to database via backend php script
    fetch('http://192.168.1.7/tr_reactnative/insert.php',{
        method: 'POST',
        headers: {
            'Content-Type': 'multipart/form-data',
          },
          body: formData
      })
      .then((response) => response.json())
      .then((responseJson) => {
       // return responseJson  
         alert(responseJson);
         this.props.navigation.navigate('seconde');      
        })
        .catch((error) => {
            console.error(error);
          });

   //alert('Pressed!!'); 
    }

您会找到更多信息here。

如何在 React Native 中通过上传图片获取数据到 php 服务器

How to fetch data with upload image to php server in React Native

php

api

form-data

react-native

react-native-fetch-blob