本篇文章主要介绍了react-native-fs实现文件下载、文本存储的示例代码,具有一定的参考价值,有兴趣的可以了解下
本文内容:
react-native-fs的简单使用
下载文件(图片、文件、视频、音频)
将文本写入本地 txt
读取txt文件内容
在已有的txt上添加新的文本
上传文件 only iOS
github链接:
https://github.com/itinance/react-native-fs
另外还有一个下载的库 :
https://github.com/wkh237/react-native-fetch-blob
npm install react-native-fs --save
react-native link react-native-fs
OK 即可开始使用(不放心的可以按照github上的对比一下)
import RNFS from 'react-native-fs';
/*下载文件*/
downloadFile() {
// On Android, use "RNFS.DocumentDirectoryPath" (MainBundlePath is not defined)
// 图片
// const downloadDest = `${RNFS.MainBundlePath}/${((Math.random() * 1000) | 0)}.jpg`;
// const formUrl = 'http://img.kaiyanapp.com/c7b46c492261a7c19fa880802afe93b3.png?imageMogr2/quality/60/format/jpg';
// 文件
// const downloadDest = `${RNFS.MainBundlePath}/${((Math.random() * 1000) | 0)}.zip`;
// const formUrl = 'http://files.cnblogs.com/zhuqil/UIWebViewDemo.zip';
// 视频
// const downloadDest = `${RNFS.MainBundlePath}/${((Math.random() * 1000) | 0)}.mp4`;
// http://gslb.miaopai.com/stream/SnY~bbkqbi2uLEBMXHxGqnNKqyiG9ub8.mp4?vend=miaopai&
// https://gslb.miaopai.com/stream/BNaEYOL-tEwSrAiYBnPDR03dDlFavoWD.mp4?vend=miaopai&
// const formUrl = 'https://gslb.miaopai.com/stream/9Q5ADAp2v5NHtQIeQT7t461VkNPxvC2T.mp4?vend=miaopai&';
// 音频
const downloadDest = `${RNFS.MainBundlePath}/${((Math.random() * 1000) | 0)}.mp3`;
// http://wvoice.spriteapp.cn/voice/2015/0902/55e6fc6e4f7b9.mp3
const formUrl = 'http://wvoice.spriteapp.cn/voice/2015/0818/55d2248309b09.mp3';
const options = {
fromUrl: formUrl,
toFile: downloadDest,
background: true,
begin: (res) => {
console.log('begin', res);
console.log('contentLength:', res.contentLength / 1024 / 1024, 'M');
progress: (res) => {
let pro = res.bytesWritten / res.contentLength;
this.setState({
progressNum: pro,
try {
const ret = RNFS.downloadFile(options);
ret.promise.then(res => {
console.log('success', res);
console.log('file://' + downloadDest)
}).catch(err => {
console.log('err', err);
catch (e) {
console.log(error);
将文本写入本地 txt
/*将文本写入本地 txt*/
writeFile() {
// create a path you want to write to
const path = RNFS.MainBundlePath + '/test.txt';
// write the file
RNFS.writeFile(path, '这是一段文本,YES', 'utf8')
.then((success) => {
console.log('path', path);
.catch((err) => {
console.log(err.message);
读取txt文件内容
/*读取txt文件内容*/
readFile() {
// create a path you want to delete
const path = RNFS.MainBundlePath + '/test.txt';
return RNFS.readFile(path)
.then((result) => {
console.log(result);
this.setState({
readTxtResult: result,
.catch((err) => {
console.log(err.message);
在已有的txt上添加新的文本
/*在已有的txt上添加新的文本*/
appendFile() {
const path = RNFS.MainBundlePath + '/test.txt';
return RNFS.appendFile(path, '新添加的文本', 'utf8')
.then((success) => {
console.log('success');
.catch((err) => {
console.log(err.message);
/*删除文件*/
deleteFile() {
// create a path you want to delete
const path = RNFS.MainBundlePath + '/test.txt';
return RNFS.unlink(path)
.then(() => {
console.log('FILE DELETED');
// `unlink` will throw an error, if the item to unlink does not exist
.catch((err) => {
console.log(err.message);
上传文件 only iOS
/*上传文件 only iOS*/
uploadFile() {
const uploadSrc = `${RNFS.MainBundlePath}/test.txt`;
const uploadUrl = 'http://buz.co/rnfs/upload-tester.php';
const options = {
toUrl: uploadUrl,
files: [{name: 'myfile', filename: 'test.txt', filepath: uploadSrc, filetype: 'text/plain'}],
background: true,
method: 'POST', // PUT
begin: (res) => {
console.log('begin', res);
progress: (res) => {
console.log('progress', res);
const ret = RNFS.uploadFiles(options);
return ret.promise.then(res => {
const response = JSON.parse(res.body);
console.log(response);
.catch(err => {
console.log('err', err);
demo:
https://github.com/chjwrr/RN-react-native-fs
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。
您可能感兴趣的文章:
电脑版
-
返回首页
2006-2024 脚本之家 JB51.Net , All Rights Reserved.
苏ICP备14036222号