How to upload pictures in WeChat applet development

handleCancelPic() { let id = this.data.dbId;
 wx.chooseImage({
 count: 3, // 默认9
 sizeType: ['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: res => {
 // 返回选定照片的本地文件路径列表，tempFilePath可以作为img标签的src属性显示图片
 var tempFilePaths = res.tempFilePaths;

 this.setData({
 src: tempFilePaths
 })
 upload(this,tempFilePaths,'','');
 }
 })
 }
然后一个封装好的方法function upload(page, path,way,id) {
 console.log(path)
 wx.showToast({
 icon: "loading",
 title: "正在上传"
 });
 var test = [],
 that = this; for (var i = 0; i wx.uploadFile({
 url: api.CancelImg,
 filePath: path[i], 
 name: 'file',
 header: { "Content-Type": "multipart/form-data" },
 success: res => {
 test.push(res);
 wx.setStorageSync('cancelImg',test)
 console.log(test) if (res.statusCode != 200) { 
 wx.showModal({
 title: '提示',
 content: '上传失败',
 showCancel: false
 }) return;
 }else {
 wx.showModal({
 title: '提示',
 content: '上传成功',
 showCancel: false
 }) 
 }
 },
 fail: function (e) {
 console.log(e);
 wx.showModal({
 title: '提示',
 content: '上传失败',
 showCancel: false
 })
 },
 complete: function () {
 wx.hideToast(); //隐藏Toast
 }
 })
 }