onShow : function(){
 var that = this;
 //监测蓝牙状态的改变
 wx.onBluetoothAdapterStateChange(function (res) {
  if (res.available) {//如果用户打开蓝牙，开始搜索IBeacon
  searchBeacon();
  }
 })
 
 //搜索beacons
 searchBeacon();
 //搜索函数
 function searchBeacon() {
  //检测蓝牙状态
  wx.openBluetoothAdapter({
  success: function (res) {//蓝牙状态：打开
   wx.startBeaconDiscovery({//开始搜索附近的iBeacon设备
   uuids: ['FDA50693-A4E2-4FB1-AFCF-C6EB07647825'],//参数uuid
   success: function (res) {
    wx.onBeaconUpdate(function (res) {//监听 iBeacon 设备的更新事件 
    //封装请求数据 
    var beacons = res.beacons;
    var reqContent = {};
    var bleArray = [];
    for (var i = 0; i < beacons.length; i++) {
     var bleObj = {};
     bleObj.distance = beacons[i].accuracy;
     bleObj.rssi = beacons[i].rssi;
     bleObj.mac = beacons[i].major + ":" + beacons[i].minor;
     bleArray.push(bleObj);
    }
    reqContent.ble = bleArray;
    //请求后台向redis插入数据
    redisSave(reqContent);
    });
   },
   fail: function (res) {
    //先关闭搜索再重新开启搜索,这一步操作是防止重复wx.startBeaconDiscovery导致失败
    stopSearchBeacom();
   }
   })
  },
  fail: function (res) {//蓝牙状态：关闭
   wx.showToast({ title: "请打开蓝牙", icon: "none", duration: 2000 })
  }
  })
 }
 function redisSave(reqContent) {
  wx.request({
  url: "https://map.intmote.com/LocateServer/location.action",
  data: JSON.stringify(reqContent),
  method: 'POST',
  header: {
   'Content-type': 'application/json'
  },
  success: function (res) {
   // wx.showToast({ title: "seccess" })
  },
  fail: function (res) {
   // wx.showToast({ title: "1" })
  }
  });
 }
 //关闭成功后开启搜索
 function stopSearchBeacom() {
  wx.stopBeaconDiscovery({
  success: function () {
   searchBeacon();
  }
  })
 } 
 },