在ios9系统上完成正常，升级之后，advertisData转化成字符串 是相同的了（附截图）

代码如下：

else if (app.deviceInnfo.platform == 'ios') {

      //真机

      peripheral = res.devices[0];

      var advertisData = peripheral.advertisData;

      var data = wx.base64ToArrayBuffer(advertisData);

      var str = buf2hex(data);

      peripheral.mac_add = getMacAddress(str.toUpperCase());

      peripheral.advertisDataStr = str;

      array.push(res.devices[0]);

      console.log(peripheral);

   }

function buf2hex(buffer) {

  return Array.prototype.map.call(new Uint8Array(buffer), x => ('00' + x.toString(16)).slice(-2)).join('');

}