要实现的效果如图所示

wxml:

     
      请提供相关问题的截图或照片
       
         
            
               
                
              
            
          
            
             
       
        上传图片
            
        
     

js:

  data: {

  　　add_img:[]

  },

gotoShow:function(){    var that=this;    wx.chooseImage({      success: function(res) {         // console.log(res.tempFilePaths)        var src = res.tempFilePaths;        var aa=that.data.add_img.concat(src)        // console.log(aa)        that.setData({          add_img:aa        })      },    })  },  delete_th:function(e){    var num=e.currentTarget.dataset.num;    var that=this;    wx.showModal({      title: '提示',      content: '确定要删除吗？',      success: function (res) {        if (res.confirm) {           that.data.add_img.splice(num,1)          that.setData({            add_img:that.data.add_img          })        } else if (res.cancel) {          console.log('用户点击取消')        }      }    })  },  preview_img:function(e){    var cur_num=e.currentTarget.dataset.num;    var img_list=this.data.add_img    wx.previewImage({      current:img_list[cur_num],      urls: this.data.add_img    })  },