/**
 * 上传照片//选择图片时限制9张，如需超过9张，同理亦可参照此方法上传多张照片
 */
uploadImg:function(){
 var that = this;
 wx.chooseImage({
 count: 9,
  sizeType: ['original', 'compressed'],
  sourceType: ['album', 'camera'],
  success: function(res){
  var successUp = 0; //成功
  var failUp = 0; //失败
  var length = res.tempFilePaths.length; //总数
  var count = 0; //第几张
  that.uploadOneByOne(res.tempFilePaths,successUp,failUp,count,length);
  }, 
 });
},
/**
 * 采用递归的方式上传
 */
 uploadOneByOne(imgPaths,successUp, failUp, count, length){
 var that = this;
 wx.showLoading({
 title: '正在上传第'+count+'张',
 })
 wx.uploadFile({
 url: 'https://example.weixin.qq.com/upload', //仅为示例，非真实的接口地址
 filePath: imgPaths[count],
 name: count,//示例，使用顺序给文件命名
 success:function(e){
 successUp++;//成功+1
 },
 fail:function(e){
 failUp++;//失败+1
 },
 complete:function(e){
 count++;//下一张
 if(count == length){
  //上传完毕，作一下提示
  console.log('上传成功' + successUp + ',' + '失败' + failUp);
  wx.showToast({
  title: '上传成功' + successUp,
  icon: 'success',
  duration: 2000
  })
 }else{
  //递归调用，上传下一张
  that.uploadOneByOne(imgPaths, successUp, failUp, count, length);
  console.log('正在上传第' + count + '张');
 }
 }
 })
 },