微信小程序上传图片

一、页面WXML

<view class="weui-uploader__bd">
    <view class="weui-uploader__files">
      <block wx:for="{{imageList}}" wx:for-item="image">
        <view class="weui-uploader__file">
          <image class="weui-uploader__img" src="{{image}}" data-src="{{image}}" bindtap="previewImage"></image>
        </view>
      </block>
    </view>
    <view class="weui-uploader__input-box">
      <view class="weui-uploader__input" bindtap="chooseImage"></view>
    </view>
  </view>
</view>
<view class="l-btn" bindtap="upload">发布需求</view>

二、选择图片

data:{
　　imageList:[]
},
chooseImage: function () {
    var that = this
    wx.chooseImage({
      count: 6,
      success: function (res) {
        that.setData({
          imageList: res.tempFilePaths
        })
      }
    })
  },

三、上传

小程序一次只能上传一张图片，所以写了一个递归去上传，里面的判断没好好写，大概就是个思路，欢迎拍砖**

upload:function(){
  var i = 0, demand_id='',uploadFiles = function(){
        // console.log(i,demand_id)
        if (i == self.data.imageList.length) {
          sig = false;
          wx.redirectTo({ url:'../square/square?demand_id=' + demand_id });
          return;
        }
        wx.uploadFile({
          url: app.globalData.ajaxurl + 'api/demand/push',
          filePath: self.data.imageList[i], // 通过chooseImage获取到的文件临时列表
          name: 'file',  //文件键名（后台通过此名字获得文件数据）
          formData: formdata, //二外数据
          complete:function(res){
            if(typeof res.data == 'string'){
              res.data = JSON.parse(res.data)
            }
            i++;
            if (res.statusCode == 200) {
              if (res.data.status == 200 && i==1) {
                formdata.demand_id = res.data.data.demand_id;
                if(!demand_id){
                  demand_id = formdata.demand_id;
                  // console.log(demand_id)
                }
                uploadFiles();
              }
            }else{
              wx.showModal({
                title: '失败',
                content: '请求失败,请重试'
              })
              sig = false;
              return;
            }
            if(i>1){
              uploadFiles();
            }
          }
        });
      }
      uploadFiles();
    }
  
}