test.wxml页面

<view class="title">请选择要反馈的问题view>
<view>
  <picker bindchange="bindPickerChange" value="{{index}}" range="{{array}}">
    <view>{{array[index]}}view>
  <image src='../../image/ic_down.svg' class='picker_icon'>image>
  picker>
view>
<textarea placeholder="请输入您的意见或建议" name="textarea" bindinput="feedbackInput"/>
<view class="title">图片添加view>
<view class='uploadImg'>
  <view wx:for="{{image}}" wx:key='feedbackImg'>
    <image src='{{image[index]}}'>image>
    <button bindtap='delectImg' data-num='{{index}}'>删除button>
  view>
  <image src='../../image/ic_add_pic.svg' bindtap='uploadImg' class='addimg' style='display:{{img_button}}'>image>
view>
<button class="submit" type="{{button_status}}" bindtap="Submit"> 提交 button>

test.js页面

var app = getApp();
Page({
  data: {
    array: ['程序错误', '软件改善', '业务建议'],
    index:0,
    msg:'',
    button_status: 'default',
    image:[],
    img_button:'inline-block',
  },
  bindPickerChange: function (e) {
    this.setData({ 
      index: e.detail.value 
    });
  },
  Submit: function (e) {
    if(this.data.msg.length != 0){
      var that=this;
      wx.showModal({
        title: '提示',
        content: '是否确认提交？',
        success: function (res) {
          if (res.confirm) {
            wx.request({
              url: app.appUrl.url + 'advise/uid/' + app.appData.userid + '/type/' + that.data.array[that.data.index] + '/content/' + that.data.msg,//+pic=图片地址1，图片地址2，图片地址3此处读取图片隐藏域的图片地址，多张用逗号分隔
              header: {
                "Content-Type": "applciation/json"
              },
              method: "POST",
              success: function (res) { },
              fail: function (err) { },
              complete: function (res) {
                wx.showToast({
                  title: '提交成功',
                  image: '/image/right.png',
                  duration: 3000
                })
                setTimeout(function () {
                  wx.clearStorage()
                  wx.navigateBack({
                    delta: 1
                  })
                }, 2000);
              },
            })
          }
        },
      })
    }
  },
  feedbackInput: function (event) {
    console.log(event.detail.value.length);
    if (event.detail.value.length==0){
      this.setData({
        button_status: 'default',
      });  
    }
    else{
      this.setData({
        button_status: 'primary',
      });  
    }
    this.setData({
      msg: event.detail.value,
    });
  },
  uploadImg:function(){
    var that = this, image = this.data.image;
    if(this.data.image.length<3){
      wx.chooseImage({
        count: 1, // 默认9
        sizeType: ['original', '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: function (res) {
          wx.uploadFile({
            url: app.appUrl.url + 'upload',//这个方法就是后台处理上传的方法
            filePath: res.tempFilePaths[0], //获取到上传的图片
            name: 'file',
            success: function (info) {
              console.log(info);//info.data就是上传成功的图片名称 您可以在wxml里面搞一个隐藏域存储起来，在上面Submit提交里拼装一块提交出去
            }
          })
        },
        complete: function (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
          if (that.data.image.length==2){
            that.setData({
              img_button: 'none',
            })
          }
          image.push(res.tempFilePaths);
          that.setData({
            image: image,
          })
        }
      })
    }
  },
  delectImg:function(e){
    var image = this.data.image;
    image.splice(e.currentTarget.dataset.num,1);
    this.setData({
      image: image,
      img_button: 'inline-block',
    })
  },
})

thinkphp5接受处理

    //图片上传
    public function upload(){
        $file = request()->file('file');
        $info = $file->move(ROOT_PATH . 'public' . DS . 'uploads/images');
        if($info){
            echo $info->getSaveName();
            die();
        }else{
            echo $file->getError();
            die();
        }
    }