<!--pages/upload/upload.wxml-->
<button bindtap='uploadPhoto'>拍照选取照片上传</button>

// pages/upload/upload.js
Page({
 data: {
  imgData: []
 },
 uploadPhoto(e) { // 拍摄或从相册选取上传
  let that = this;
  wx.chooseImage({
   count: 1, // 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) {
    let tempFilePaths = res.tempFilePaths; // 返回选定照片的本地路径列表 
    that.upload(that, tempFilePaths);
   }
  })
 },
 upload(page, path) { // 上传图片
  wx.showToast({ icon: "loading", title: "正在上传……" });
  wx.uploadFile({
   url: '上传图片接口url', //后端接口
   filePath: path[0],
   name: 'file',
   header: {
    "Content-Type": "multipart/form-data"
   },
   success(res) {
    if (res.statusCode != 200) {
     wx.showModal({ title: '提示', content: '上传失败', showCancel: false });
     return;
    } else{
     console.log("上传成功！ 可对返回的值进行操作，比如：存入imgData；");
    }
   },
   fail(e) {
    wx.showModal({ title: '提示', content: '上传失败', showCancel: false });
   },
   complete() {
    wx.hideToast(); //隐藏Toast
   }
  })
 }
})

// pages/publish/publish.js
Page({
 data: {
  imgData: []
 },
 uploadPhoto(e) { // 拍摄或从相册选取上传
  let that = this;
  wx.chooseImage({
   count: 9 - that.data.imgData.length, // 默认最多上传9张
   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) {
    let tempFilePaths = res.tempFilePaths; // 返回选定照片的本地路径列表 
    that.upload(that, tempFilePaths);
   }
  })
 },
 upload(page, path) { // 上传图片
  let that = this;
  wx.showToast({ icon: "loading", title: "正在上传……" });
  for (var i=0; i<path.length; i++) {
   wx.uploadFile({
    url: '上传图片接口url', //后端接口
    filePath: path[i],
    name: 'file',
    header: app.globalData.header,
    success(res) {
     if (res.statusCode != 200) {
      wx.showModal({
       title: '提示', 
       content: '第' + i +'张图片上传失败', 
       showCancel: false
      });
      return;
     } else {
      console.log('第' + i +'张图片上传成功！可在此操作，比如：存入imgData;');
     }
    },
    fail(e) {
     wx.showModal({
     title: '提示', 
     content: '第' + i +'张图片上传失败', 
     showCancel: false
     });
    },
    complete() {
     wx.hideToast(); //隐藏Toast
    }
   })
  }
 }
})