/**
 * 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');
  }
  }
 })
 },