先看下接口
方法：
需要自己写formdata，因为小程序中不支持formdata传参
建立一个formdata文件夹，以及两个子文件
index.js
import mimeMap from './mimeMap'
function FormData(){
let fileManager = wx.getFileSystemManager();
let data = {};
let files = [];
this.append = (name, value)=>{
data[name] = value;
return true;
}
this.appendFile = (name, path)=>{
let buffer = fileManager.readFileSync(path);
if(Object.prototype.toString.call(buffer).indexOf("ArrayBuffer") < 0){
return false;
}
files.push({
name: name,
buffer: buffer,
fileName: getFileNameFromPath(path)
});
return true;
}
this.getData = ()=>convert(data, files)
}
function getFileNameFromPath(path){
let idx=path.lastIndexOf("/");
return path.substr(idx+1);
}
function convert(data, files){
let boundaryKey = 'wxmpFormBoundary' + randString(); // 数据分割符，一般是随机的字符串
let boundary = '--' + boundaryKey;
let endBoundary = boundary + '--';
let postArray = [];
//拼接参数
if(data && Object.prototype.toString.call(data) == "[object Object]"){
for(let key in data){
postArray = postArray.concat(formDataArray(boundary, key, data[key]));
}
}
//拼接文件
if(files && Object.prototype.toString.call(files) == "[object Array]"){
for(let i in files){
let file = files[i];
postArray = postArray.concat(formDataArray(boundary, file.name, file.buffer, file.fileName));
}
}
//结尾
let endBoundaryArray = [];
for (var i = 0; i < endBoundary.length; i++) { // 最后取出结束boundary的charCode
endBoundaryArray.push(...endBoundary.utf8CodeAt(i));
}
postArray = postArray.concat(endBoundaryArray);
return {
contentType: 'multipart/form-data; boundary=' + boundaryKey,
buffer: new Uint8Array(postArray).buffer
}
}
function randString() {
let res = "";
for (let i = 0; i < 17; i++) {
let n = parseInt(Math.random() * 62);
if (n <= 9) {
res += n;
}
else if (n <= 35) {
res += String.fromCharCode(n + 55);
}
else {
res += String.fromCharCode(n + 61);
}
}
return res;
}
function formDataArray(boundary, name, value, fileName){
let dataString = '';
let isFile = !!fileName;
dataString += boundary + '\r\n';
dataString += 'Content-Disposition: form-data; name="' + name + '"';
if (isFile){
dataString += '; filename="' + fileName + '"' + '\r\n';
dataString += 'Content-Type: ' + getFileMime(fileName) + '\r\n\r\n';
}
else{
dataString += '\r\n\r\n';
dataString += value;
}
var dataArray = [];
for (var i = 0; i < dataString.length; i++) { // 取出文本的charCode（10进制）
dataArray.push(...dataString.utf8CodeAt(i));
}
if (isFile) {
let fileArray = new Uint8Array(value);
dataArray = dataArray.concat(Array.prototype.slice.call(fileArray));
}
dataArray.push(..."\r".utf8CodeAt());
dataArray.push(..."\n".utf8CodeAt());
return dataArray;
}
function getFileMime(fileName){
let idx = fileName.lastIndexOf(".");
let mime = mimeMap[fileName.substr(idx)];
return mime?mime:"application/octet-stream"
}
String.prototype.utf8CodeAt = function(i) {
var str = this;
var out = [], p = 0;
var c = str.charCodeAt(i);
if (c < 128) {
out[p++] = c;
} else if (c < 2048) {
out[p++] = (c >> 6) | 192;
out[p++] = (c & 63) | 128;
} else if (
((c & 0xFC00) == 0xD800) && (i + 1) < str.length &&
((str.charCodeAt(i + 1) & 0xFC00) == 0xDC00)) {
// Surrogate Pair
c = 0x10000 + ((c & 0x03FF) << 10) + (str.charCodeAt(++i) & 0x03FF);
out[p++] = (c >> 18) | 240;
out[p++] = ((c >> 12) & 63) | 128;
out[p++] = ((c >> 6) & 63) | 128;
out[p++] = (c & 63) | 128;
} else {
out[p++] = (c >> 12) | 224;
out[p++] = ((c >> 6) & 63) | 128;
out[p++] = (c & 63) | 128;
}
return out;
};
export default FormData;
mimeMap.js
const mimeMap = {
"0.001": "application/x-001",
"0.323": "text/h323",
"0.907": "drawing/907",
".acp": "audio/x-mei-aac",
".aif": "audio/aiff",
".aiff": "audio/aiff",
".asa": "text/asa",
".asp": "text/asp",
".au": "audio/basic",
".awf": "application/vnd.adobe.workflow",
".bmp": "application/x-bmp",
".c4t": "application/x-c4t",
".cal": "application/x-cals",
".cdf": "application/x-netcdf",
".cel": "application/x-cel",
".cg4": "application/x-g4",
".cit": "application/x-cit",
".cml": "text/xml",
".cmx": "application/x-cmx",
".crl": "application/pkix-crl",
".csi": "application/x-csi",
".cut": "application/x-cut",
".dbm": "application/x-dbm",
".dcd": "text/xml",
".der": "application/x-x509-ca-cert",
".dib": "application/x-dib",
".doc": "application/msword",
".drw": "application/x-drw",
".dwf": "Model/vnd.dwf",
".dwg": "application/x-dwg",
".dxf": "application/x-dxf",
".emf": "application/x-emf",
".ent": "text/xml",
".eps": "application/x-ps",
".etd": "application/x-ebx",
".fax": "image/fax",
".fif": "application/fractals",
".frm": "application/x-frm",
".gbr": "application/x-gbr",
".gif": "image/gif",
".gp4": "application/x-gp4",
".hmr": "application/x-hmr",
".hpl": "application/x-hpl",
".hrf": "application/x-hrf",
".htc": "text/x-component",
".html": "text/html",
".htx": "text/html",
".ico": "image/x-icon",
".iff": "application/x-iff",
".igs": "application/x-igs",
".img": "application/x-img",
".isp": "application/x-internet-signup",
".java": "java/*",
".jpe": "image/jpeg",
".jpeg": "image/jpeg",
".jpg": "application/x-jpg",
".jsp": "text/html",
".lar": "application/x-laplayer-reg",
".lavs": "audio/x-liquid-secure",
".lmsff": "audio/x-la-lms",
".ltr": "application/x-ltr",
".m2v": "video/x-mpeg",
".m4e": "video/mpeg4",
".man": "application/x-troff-man",
".mdb": "application/msaccess",
".mfp": "application/x-shockwave-flash",
".mhtml": "message/rfc822",
".mid": "audio/mid",
".mil": "application/x-mil",
".mnd": "audio/x-musicnet-download",
".mocha": "application/x-javascript",
".mp1": "audio/mp1",
".mp2v": "video/mpeg",
".mp4": "video/mpeg4",
".mpd": "application/vnd.ms-project",
".mpeg": "video/mpg",
".mpga": "audio/rn-mpeg",
".mps": "video/x-mpeg",
".mpv": "video/mpg",
".mpw": "application/vnd.ms-project",
".mtx": "text/xml",
".net": "image/pnetvue",
".nws": "message/rfc822",
".out": "application/x-out",
".p12": "application/x-pkcs12",
".p7c": "application/pkcs7-mime",
".p7r": "application/x-pkcs7-certreqresp",
".pc5": "application/x-pc5",
".pcl": "application/x-pcl",
".pdf": "application/pdf",
".pdx": "application/vnd.adobe.pdx",
".pgl": "application/x-pgl",
".pko": "application/vnd.ms-pki.pko",
".plg": "text/html",
".plt": "application/x-plt",
".png": "application/x-png",
".ppa": "application/vnd.ms-powerpoint",
".pps": "application/vnd.ms-powerpoint",
".ppt": "application/x-ppt",
".prf": "application/pics-rules",
".prt": "application/x-prt",
".ps": "application/postscript",
".pwz": "application/vnd.ms-powerpoint",
".ra": "audio/vnd.rn-realaudio",
".ras": "application/x-ras",
".rdf": "text/xml",
".red": "application/x-red",
".rjs": "application/vnd.rn-realsystem-rjs",
".rlc": "application/x-rlc",
".rm": "application/vnd.rn-realmedia",
".rmi": "audio/mid",
".rmm": "audio/x-pn-realaudio",
".rms": "application/vnd.rn-realmedia-secure",
".rmx": "application/vnd.rn-realsystem-rmx",
".rp": "image/vnd.rn-realpix",
".rsml": "application/vnd.rn-rsml",
".rtf": "application/msword",
".rv": "video/vnd.rn-realvideo",
".sat": "application/x-sat",
".sdw": "application/x-sdw",
".slb": "application/x-slb",
".slk": "drawing/x-slk",
".smil": "application/smil",
".snd": "audio/basic",
".sor": "text/plain",
".spl": "application/futuresplash",
".ssm": "application/streamingmedia",
".stl": "application/vnd.ms-pki.stl",
".sty": "application/x-sty",
".swf": "application/x-shockwave-flash",
".tg4": "application/x-tg4",
".tif": "image/tiff",
".tiff": "image/tiff",
".top": "drawing/x-top",
".tsd": "text/xml",
".uin": "application/x-icq",
".vcf": "text/x-vcard",
".vdx": "application/vnd.visio",
".vpg": "application/x-vpeg005",
".vsd": "application/x-vsd",
".vst": "application/vnd.visio",
".vsw": "application/vnd.visio",
".vtx": "application/vnd.visio",
".wav": "audio/wav",
".wb1": "application/x-wb1",
".wb3": "application/x-wb3",
".wiz": "application/msword",
".wk4": "application/x-wk4",
".wks": "application/x-wks",
".wma": "audio/x-ms-wma",
".wmf": "application/x-wmf",
".wmv": "video/x-ms-wmv",
".wmz": "application/x-ms-wmz",
".wpd": "application/x-wpd",
".wpl": "application/vnd.ms-wpl",
".wr1": "application/x-wr1",
".wrk": "application/x-wrk",
".ws2": "application/x-ws",
".wsdl": "text/xml",
".xdp": "application/vnd.adobe.xdp",
".xfd": "application/vnd.adobe.xfd",
".xhtml": "text/html",
".xls": "application/x-xls",
".xml": "text/xml",
".xq": "text/xml",
".xquery": "text/xml",
".xsl": "text/xml",
".xwd": "application/x-xwd",
".sis": "application/vnd.symbian.install",
".x_t": "application/x-x_t",
".apk": "application/vnd.android.package-archive",
"0.301": "application/x-301",
"0.906": "application/x-906",
".a11": "application/x-a11",
".ai": "application/postscript",
".aifc": "audio/aiff",
".anv": "application/x-anv",
".asf": "video/x-ms-asf",
".asx": "video/x-ms-asf",
".avi": "video/avi",
".biz": "text/xml",
".bot": "application/x-bot",
".c90": "application/x-c90",
".cat": "application/vnd.ms-pki.seccat",
".cdr": "application/x-cdr",
".cer": "application/x-x509-ca-cert",
".cgm": "application/x-cgm",
".class": "java/*",
".cmp": "application/x-cmp",
".cot": "application/x-cot",
".crt": "application/x-x509-ca-cert",
".css": "text/css",
".dbf": "application/x-dbf",
".dbx": "application/x-dbx",
".dcx": "application/x-dcx",
".dgn": "application/x-dgn",
".dll": "application/x-msdownload",
".dot": "application/msword",
".dtd": "text/xml",
".dwf": "application/x-dwf",
".dxb": "application/x-dxb",
".edn": "application/vnd.adobe.edn",
".eml": "message/rfc822",
".epi": "application/x-epi",
".eps": "application/postscript",
".exe": "application/x-msdownload",
".fdf": "application/vnd.fdf",
".fo": "text/xml",
".g4": "application/x-g4",
".tif": "image/tiff",
".gl2": "application/x-gl2",
".hgl": "application/x-hgl",
".hpg": "application/x-hpgl",
".hqx": "application/mac-binhex40",
".hta": "application/hta",
".htm": "text/html",
".htt": "text/webviewhtml",
".icb": "application/x-icb",
".ico": "application/x-ico",
".ig4": "application/x-g4",
".iii": "application/x-iphone",
".ins": "application/x-internet-signup",
".IVF": "video/x-ivf",
".jfif": "image/jpeg",
".jpe": "application/x-jpe",
".jpg": "image/jpeg",
".js": "application/x-javascript",
".la1": "audio/x-liquid-file",
".latex": "application/x-latex",
".lbm": "application/x-lbm",
".ls": "application/x-javascript",
".m1v": "video/x-mpeg",
".m3u": "audio/mpegurl",
".mac": "application/x-mac",
".math": "text/xml",
".mdb": "application/x-mdb",
".mht": "message/rfc822",
".mi": "application/x-mi",
".midi": "audio/mid",
".mml": "text/xml",
".mns": "audio/x-musicnet-stream",
".movie": "video/x-sgi-movie",
".mp2": "audio/mp2",
".mp3": "audio/mp3",
".mpa": "video/x-mpg",
".mpe": "video/x-mpeg",
".mpg": "video/mpg",
".mpp": "application/vnd.ms-project",
".mpt": "application/vnd.ms-project",
".mpv2": "video/mpeg",
".mpx": "application/vnd.ms-project",
".mxp": "application/x-mmxp",
".nrf": "application/x-nrf",
".odc": "text/x-ms-odc",
".p10": "application/pkcs10",
".p7b": "application/x-pkcs7-certificates",
".p7m": "application/pkcs7-mime",
".p7s": "application/pkcs7-signature",
".pci": "application/x-pci",
".pcx": "application/x-pcx",
".pdf": "application/pdf",
".pfx": "application/x-pkcs12",
".pic": "application/x-pic",
".pl": "application/x-perl",
".pls": "audio/scpls",
".png": "image/png",
".pot": "application/vnd.ms-powerpoint",
".ppm": "application/x-ppm",
".ppt": "application/vnd.ms-powerpoint",
".pr": "application/x-pr",
".prn": "application/x-prn",
".ps": "application/x-ps",
".ptn": "application/x-ptn",
".r3t": "text/vnd.rn-realtext3d",
".ram": "audio/x-pn-realaudio",
".rat": "application/rat-file",
".rec": "application/vnd.rn-recording",
".rgb": "application/x-rgb",
".rjt": "application/vnd.rn-realsystem-rjt",
".rle": "application/x-rle",
".rmf": "application/vnd.adobe.rmf",
".rmj": "application/vnd.rn-realsystem-rmj",
".rmp": "application/vnd.rn-rn_music_package",
".rmvb": "application/vnd.rn-realmedia-vbr",
".rnx": "application/vnd.rn-realplayer",
".rpm": "audio/x-pn-realaudio-plugin",
".rt": "text/vnd.rn-realtext",
".rtf": "application/x-rtf",
".sam": "application/x-sam",
".sdp": "application/sdp",
".sit": "application/x-stuffit",
".sld": "application/x-sld",
".smi": "application/smil",
".smk": "application/x-smk",
".sol": "text/plain",
".spc": "application/x-pkcs7-certificates",
".spp": "text/xml",
".sst": "application/vnd.ms-pki.certstore",
".stm": "text/html",
".svg": "text/xml",
".tdf": "application/x-tdf",
".tga": "application/x-tga",
".tif": "application/x-tif",
".tld": "text/xml",
".torrent": "application/x-bittorrent",
".txt": "text/plain",
".uls": "text/iuls",
".vda": "application/x-vda",
".vml": "text/xml",
".vsd": "application/vnd.visio",
".vss": "application/vnd.visio",
".vst": "application/x-vst",
".vsx": "application/vnd.visio",
".vxml": "text/xml",
".wax": "audio/x-ms-wax",
".wb2": "application/x-wb2",
".wbmp": "image/vnd.wap.wbmp",
".wk3": "application/x-wk3",
".wkq": "application/x-wkq",
".wm": "video/x-ms-wm",
".wmd": "application/x-ms-wmd",
".wml": "text/vnd.wap.wml",
".wmx": "video/x-ms-wmx",
".wp6": "application/x-wp6",
".wpg": "application/x-wpg",
".wq1": "application/x-wq1",
".wri": "application/x-wri",
".ws": "application/x-ws",
".wsc": "text/scriptlet",
".wvx": "video/x-ms-wvx",
".xdr": "text/xml",
".xfdf": "application/vnd.adobe.xfdf",
".xls": "application/vnd.ms-excel",
".xlw": "application/x-xlw",
".xpl": "audio/scpls",
".xql": "text/xml",
".xsd": "text/xml",
".xslt": "text/xml",
".x_b": "application/x-x_b",
".sisx": "application/vnd.symbian.install",
".ipa": "application/vnd.iphone",
".xap": "application/x-silverlight-app",
".zip": "application/x-zip-compressed",
}
export default mimeMap;
封装图片上传
upload.js
import FormData from '../utils/formdata/index'
import {
baseUrl
} from '../config/env'
import {
getToken,
removeToken
} from "../utils/token";
// 上传图片
export function uploadFile(newUrl) { // newUrl是本地文件的 tmp 地址
let formData = new FormData();
formData.appendFile("file", newUrl);
const data = formData.getData();
let _token = getToken();
let header = {};
if (_token == null) {
header["Authorization"] = `Basic ${Base64.encode(website.clientId + ":" + website.clientSecret)}`;
} else {
header["Authorization"] = `Bearer ` + _token;
}
return new Promise((resolve, reject) => {
wx.request({
url: baseUrl + '/api-bureau/f/upload',
method: 'POST',
header: {
'content-type': data.contentType,
...header
},
data: data.buffer,
success(res) {
if (res.statusCode == 401) {
//如果返回未授权，执行删除本地token标志
removeToken();
wx.reLaunch({
url: '/pages/login/login'
});
}
if (res.statusCode == 200) {
resolve(res.data);
} else {
reject('运行时错误,请稍后再试');
}
}
});
})
}
使用
wxml:
<view class="weui-uploader">
<view class='pics' wx:for="{{imgs}}" wx:for-item="item" wx:key="*this">
<image class='weui-uploader__img' src="{{item}}" data-index="{{index}}" mode="aspectFill" bindtap="previewImg">
<icon type='cancel' class="delete-btn" data-index="{{index}}" catchtap="deleteImg"></icon>
</image>
</view>
<view class="tp_cont {{tj_ycang?'':'hide'}}" bindtap="chooseImg">
<view class="tp_add">+</view>
</view>
</view>
js：
import { uploadFile } from '../../request/upload' //引入
//data定义
data:{
imgPics: [],
file: "",
imgs: [],
},
// 上传图片事件
chooseImg: function (e) {
var that = this;
var imgs = this.data.imgs;
if (imgs.length >= 9) {
this.setData({
lenMore: 1
});
setTimeout(function () {
that.setData({
lenMore: 0
});
}, 2500);
return false;
}
wx.chooseMedia({
// count: 1, // 默认9
sizeType: ['original', 'compressed'], // 可以指定是原图还是压缩图，默认二者都有
sourceType: ['album', 'camera'], // 可以指定来源是相册还是相机，默认二者都有
success: function (res) {
console.log(res)
// 返回选定照片的本地文件路径列表，tempFilePath也可以作为img标签的src属性显示图片
console.log(res.tempFiles[0])
uploadFile(res.tempFiles[0].tempFilePath).then(res=>{
that.setData({
imgs: [res.data.url] //回显图片，将上传成功后接口返回的url地址赋给imgs用于展示
});
})
// 下面是上传多张，需要多张的话就自己处理下
// for (var i = 0; i < tempFilePaths.length; i++) {
// if (imgs.length >= 9) {
// that.setData({
// imgs: imgs
// });
// return false;
// } else {
// imgs.push(tempFilePaths[i]['tempFilePath']);
// }
// }
// console.log(imgs);
}
});
},
// 删除图片
deleteImg: function (e) {
var imgs = this.data.imgs;
var index = e.currentTarget.dataset.index;
imgs.splice(index, 1);
this.setData({
imgs: imgs
});
},
// 预览现场图片
previewImg: function (e) {
//获取当前图片的下标
var index = e.currentTarget.dataset.index;
//所有图片
var imgs = this.data.imgs;
wx.previewImage({
//当前显示图片
current: imgs[index],
//所有图片
urls: imgs
})
},
wxss:
/* 上传图片样式 */
.three {
margin-top: 27rpx;
}
.weui-uploader {
margin-top: 16rpx;
}
.tp_add {
width: 152rpx;
height: 152rpx;
border-radius: 10rpx;
opacity: 1;
border: 2rpx dashed #999999;
display: flex;
justify-content: center;
align-items: center;
font-size: 59rpx;
}
.pics {
float: left;
position: relative;
margin-right: 15px;
}
.pics image {
width: 152rpx;
height: 152rpx;
}
.delete-btn {
width: 20rpx;
height: 20rpx;
position: absolute;
top: -15rpx;
right: -5rpx;
}
.weui-uploader {
padding: 10rpx;
}