text: const layObj = {
      uploadImg(ele, temp = 'uploads.html') {
          layer.open({
              type: 2
              , area: ['600px', '700px']
              , title: '上传图片'
              , shade: 0.6 //遮罩透明度
              , maxmin: false //允许全屏最小化
              , anim: 1 //0-6的动画形式，-1不开启
              , content: temp
              , success: function (layero, index) {
                  let body = layer.getChildFrame('body', index);//建立父子联系
                  let html = `<input type="hidden" id="child-val" value="${ele}">`;
                  body.append(html)
              }
          });
      },
      dialog(temp,title='添加分类') {
          layer.open({
              type: 2
              , area: ['650px', '560px']
              , title: title
              , shade: 0.6 //遮罩透明度
              , maxmin: false //允许全屏最小化
              , anim: 1 //0-6的动画形式，-1不开启
              , content: temp
              , success(layero, index) {
                  console.log(layero, index)
                  // let body = layer.getChildFrame('body', index);//建立父子联系
                  // let html =   `<input type="hidden" id="child-val" value="${ele}">`;
                  // body.append(html)
              }
          });
      },
      msg(text,fn=()=>{}) {
          layer.msg(text,function () {
              fn()
              // window.location.reload();
          });
      },
      //询问框
      box(msg, func) {
          layer.confirm(msg, {
              title: '提示',
              btn: ['确定', '取消'] //按钮
          }, function () {
              func()
          })
      },
      get(url, func, err=()=>{}) {
          $.ajax({
              url,
              type: 'GET',
              success(res) {
                  return   func(res)
              },
              error(res) {
                  return   err(res)
              }
          })
      },
      post(url, data, func, err=()=>{}) {
          $.ajax({
              url,
              data,
              type: 'POST',
              dataType: "json",
              success(res) {
                  return   func(res)
              },
              error(res) {
                  return   err(res)
              }
          })
      }
  };
  
  function draw(show_num, ele = 'canvas') {
      var canvas_width = $('#' + ele).width();
      var canvas_height = $('#' + ele).height();
      var canvas = document.getElementById(ele);//获取到canvas的对象，演员
      var context = canvas.getContext("2d");//获取到canvas画图的环境，演员表演的舞台
      canvas.width = canvas_width;
      canvas.height = canvas_height;
      var sCode = "A,B,C,E,F,G,H,J,K,L,M,N,P,Q,R,S,T,W,X,Y,Z,1,2,3,4,5,6,7,8,9,0";
      var aCode = sCode.split(",");
      var aLength = aCode.length;//获取到数组的长度
  
      for (var i = 0; i <= 3; i++) {
          var j = Math.floor(Math.random() * aLength);//获取到随机的索引值
          var deg = Math.random() * 30 * Math.PI / 180;//产生0~30之间的随机弧度
          var txt = aCode[j];//得到随机的一个内容
          show_num[i] = txt.toLowerCase();
          var x = 10 + i * 20;//文字在canvas上的x坐标
          var y = 20 + Math.random() * 8;//文字在canvas上的y坐标
          context.font = "bold 23px 微软雅黑";
  
          context.translate(x, y);
          context.rotate(deg);
  
          context.fillStyle = randomColor();
          context.fillText(txt, 0, 0);
  
          context.rotate(-deg);
          context.translate(-x, -y);
      }
      for (var i = 0; i <= 5; i++) { //验证码上显示线条
          context.strokeStyle = randomColor();
          context.beginPath();
          context.moveTo(Math.random() * canvas_width, Math.random() * canvas_height);
          context.lineTo(Math.random() * canvas_width, Math.random() * canvas_height);
          context.stroke();
      }
      for (var i = 0; i <= 30; i++) { //验证码上显示小点
          context.strokeStyle = randomColor();
          context.beginPath();
          var x = Math.random() * canvas_width;
          var y = Math.random() * canvas_height;
          context.moveTo(x, y);
          context.lineTo(x + 1, y + 1);
          context.stroke();
      }
  }
  
  function randomColor() {//得到随机的颜色值
      var r = Math.floor(Math.random() * 256);
      var g = Math.floor(Math.random() * 256);
      var b = Math.floor(Math.random() * 256);
      return "rgb(" + r + "," + g + "," + b + ")";
  }
  
  
  function toTree(data) { // 生成递归树
      // 删除 所有 children,以防止多次调用
      data.forEach(function (item) {
          delete item.children;
      });
      // 将数据存储为 以 id 为 KEY 的 map 索引数据列
      var map = {};
      data.forEach(function (item) {
          map[item.id] = item;
      });
  
      var val = [];
      data.forEach(function (item) {
          // 以当前遍历项，的pid,去map对象中找到索引的id
          var parent = map[item.pid];
          // 好绕啊，如果找到索引，那么说明此项不在顶级当中,那么需要把此项添加到，他对应的父级中
          if (parent) {
              (parent.children || (parent.children = [])).push(item);
          } else {
              //如果没有在map中找到对应的索引ID,那么直接把 当前的item添加到 val结果集中，作为顶级
              val.push(item);
          }
      });
      return val;
  }
  
  
  
  