savePath: function(){
      var me = this;
      if(!me.curve){
        $.uitools.alertDlg("Path还没有定义，请先定义路径！");
        return;
      }
      var json = me.pathToJson();
      var blob = new Blob([json]);
      var url =  URL.createObjectURL(blob);
      var a = document.createElement("a");
      a.setAttribute('download','path.json');
      a.setAttribute('href',url);
      document.body.appendChild(a);
      a.click();
      a.remove();
    },