小程序图片上传封装
app.js中 写入
wxPromisify(fn) { return function (obj = {}) { return new Promise((resolve, reject) => { obj.success = function (res) { resolve(res) } obj.fail = function (res) { reject(res) } fn(obj)//执行函数，obj为传入函数的参数 }) } }在utils文件夹下新建mediaUtils.js文件
let app = getApp();var chooseImage = app.wxPromisify(wx.chooseImage) // 从本地相册选择图片或使用相机拍照var chooseVideo = app.wxPromisify(wx.chooseVideo) // 拍摄视频或从手机相册中选视频var getImageInfo = app.wxPromisify(wx.getImageInfo) // 获取图片信息
图片上传临时信息目录
// 获取图片临时目录信息function getImagePath(count, sizeNum, sourceNum) { let sizeType = [] switch (sizeNum) { case ‘1‘: sizeType = ["original"]; break; case ‘2‘: sizeType = ["compressed"]; break; default: sizeType = [‘original‘, ‘compressed‘]; break; } let sourceType = [] switch (sourceNum) { case ‘1‘: sourceType = ["album"]; break; case ‘2‘: sourceType = ["camera"]; break; default: sourceType = [‘album‘, ‘camera‘]; break; } let ref = false; return new Promise(function(resolve, reject) { chooseImage({ count: count, //最多可以选择的图片张数 sizeType: sizeType, //所选的图片的尺寸 sourceType: sourceType, //选择图片的来源 }).then(res => { resolve(res) }) })}从本地相册选择图片或使用相机拍照
function getImageObj(count, sizeNum, sourceNum) { return new Promise(function(resolve, reject) { getImagePath(count, sizeNum, sourceNum).then(res => { if (res.tempFiles.length > 0) { var promise = Promise.all(res.tempFiles.map((item, index) => { return new Promise(function(resolve, reject) { let image = { size: item.size } getImageInfo({ src: item.path }).then(res => { image.sizeStr = getImageSize(image.size) image.width = res.width image.height = res.height image.path = res.path image.type = res.type resolve(image); }) }); })).then(res => { resolve(res) }) } }) })}获取图片大小MB
var getImageSize = function(size) { var sizeNum = size / 1024 if (sizeNum > 1024) { sizeNum = (sizeNum / 1024).toFixed(2) + "MB" } else { sizeNum = sizeNum.toFixed(2) + "KB" } return sizeNum}上传视频、获取视频信息
function getVideoInfo(sourceTypeNum, maxDuration, compressed) { let sourceType = [] switch (sourceTypeNum) { //视频选择的来源 case 1: sourceType = [‘album‘] break; case 2: sourceType = [‘camera‘] break; default: sourceType = [‘album‘, ‘camera‘] break; } console.log(sourceType, sourceTypeNum) return new Promise(function(resolve, reject) { chooseVideo({ sourceType: sourceType, compressed: compressed, //是否压缩所选择的视频文件 maxDuration: maxDuration //拍摄视频最长拍摄时间，单位秒 默认60 }).then(res => { res.path = res.tempFilePath //选定视频的临时文件路径 (本地路径) res.type = res.path.substring(res.path.lastIndexOf(‘.‘) + 1) res.cover = res.thumbTempFilePath resolve(res) }) })}最后导出文件
module.exports = { getImagePath: getImagePath, getImageObj: getImageObj, getImageInfo: getImageInfo, getVideoInfo: getVideoInfo};
