微信小程序ibeacon三点定位详解

空余时间简单写了一个微信小程序ibeacon三点定位。

事先淘宝买了七八个ibeacon小设备，放置在办公司角落。分别设置三个ibeacon的位置坐标点，根据每一个ibeacon到已经开启蓝牙的目标物距离，计算出目标物在当前区域内坐标位置。适用于区域内购物指示。当然，进入该区域事先要打开手机蓝牙。

下面代码：

var app = getApp() 
Page({
 data: {
  motto: 'Hello World',
  openBLE:'打开蓝牙设备',
  startBLEDiscovery:'初始化蓝牙设备',
  startBLEDevices:'目标定位',
  reStartSearchBLE:'重置蓝牙',
  startSearchBLE:'默认空',
  userInfo: {},
  deviceId: '',
  searchFlag:true,
  deviceRSSI:'',
  deviceName:'',
  deviceId:[],
  advertisServiceUUIDs: [],
  advertisdata:[],
  canvasPointX:'',
  canvasPointY:'',
  avatarUrl:'../index/bg-image.jpg',
  showPosition:'' 
 },
 //事件处理函数
 bindViewTap: function() {
  wx.navigateTo({
   url: '../logs/logs'
  })
 },
 onLoad: function () { 
  var that = this
  //调用应用实例的方法获取全局数据 
  //that.setData({ deviceId: opt.deviceId }) 
  app.getUserInfo(function(userInfo){
   //更新数据 
   that.setData({
    userInfo:userInfo
   })
   //判断兼容性
   if (wx.openBluetoothAdapter) { 
   //打开蓝牙适配器，如果没有打开 showtoast
   wx.openBluetoothAdapter({
    success: function(res){
     // success
     //获取本机的蓝牙适配器状态
     wx.getBluetoothAdapterState({
      success: function(res){
// success
that.setData({
 searchFlag:true
}) 
      },
      fail: function(res) {
// fail 
that.setData({
 searchFlag:false
})
      },
      complete: function(res) {
// complete
      }
     })
    },
    fail: function(res) {
     // fail 本机是否已经打开蓝牙设备
      wx.showToast({title:'请打开本机蓝牙设备，重新扫码', duration:10000 })
    },
    complete: function(res) {
     // complete
    }
   })
   } else {
     // 如果希望用户在最新版本的客户端上体验您的小程序，可以这样子提示
     wx.showModal({
      title: '提示',
      content: '当前微信版本过低，无法使用该功能，请升级到最新微信版本后重试。'
     })
    } 
    
  })
  }, 
 
  startBLEDevices: function(){
    var that = this 
     wx.startBluetoothDevicesDiscovery({
      services: [],
      success: function(res){ 
//获取本机蓝牙设备状态  
  // success 
that.setData({
 showPosition:setInterval(that.devicesFunc,1000)
})  
      },
      fail: function(res) {
      // fail 
     },
     complete: function(res) {
      // complete 
     }
    })
  },
 // startBLEDevices: function(){
 //  var that = this
 //  that.setData({
 //   showPosition:setInterval(that.devicesFunc,1000)
 //  }) 
 // },
  devicesFunc: function(){
    var that = this 
    
    wx.getBluetoothDevices({
     success: function(res){
      // console.log(res); 
      var arrayRSSI = new Array();
      var arraydeviceName = new Array();
      var arraydeviceId = new Array();
      // var arrayUUIDs = new Array();
      var arrayadvertisData = new Array(); 
      var pointADistance = '';
      var pointBDistance = '';
      var pointCDistance = ''; 
      for(var i = 0; i 3){
 //根据arrayRSSI进行信号强弱排序.距离越远rssi值越小
 for(var i = 0 ; i < arrayRSSI.length ; i ++){
  for(var j = i+1 ; j< arrayRSSI.length ; j++){
   if(arrayRSSI[i] 0 && pointDY > 0){ 
  wx.showToast({title:'欢迎进入25楼craft', duration:4000 }); 
  }
 that.setData({
   canvasPointX:pointDX,
   canvasPointY:pointDY
  })
 
 //创建画布 
 //计算坐标点在规定canvas上的位置显示
 var context = wx.createCanvasContext(); 
 context.setStrokeStyle("#00ff00");
 //a,b,c,d,e,f  a,b起始坐标，c半径，d，e起始和终止角度 
 context.arc(that.data.canvasPointX*30,that.data.canvasPointY*30,5,0,2*Math.PI);
 context.fill();
 wx.drawCanvas({
  canvasId: 'firstCanvas',
  actions: context.getActions() // 获取绘图动作数组
 }) 
 
 wx.showModal({title:'X轴:'+pointDX+'Y轴:'+pointDY, duration:5000 }); 
  //开始网络请求
  wx.request({
   url: 'http://craftww.cn/weixinIbeacon/index.php',
   data: {},
   method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, ConNECT
   // header: {}, // 设置请求的 header
   success: function(res){
    // success
   },
   fail: function(res) {
    // fail
   },
   complete: function(res) {
    // complete
   }
  })
 
 }else{
 wx.showToast({title:'正在搜索...', duration:1000 })
  开始网络请求
  wx.request({
   url: 'http://craftww.cn/weixinIbeacon/index.php',
   data: {},
   method: 'GET', // OPTIONS, GET, HEAD, POST, PUT, DELETE, TRACE, ConNECT
   // header: {}, // 设置请求的 header
   success: function(res){
    // success
   },
   fail: function(res) {
    // fail
   },
   complete: function(res) {
    // complete
   }
  })
 } 
 
     },
     fail: function(res) {
      // fail
     },
     complete: function(res) {
      // complete
     }
    }) 
  } ,
  //动态显示
  createList: function(thisName){
   var that = this 
     that.setData({
      array:[{deviceDistance:"1"},{deviceDistance:"1"},{deviceDistance:"1"},{deviceDistance:"1"},{deviceDistance:"1"}]
     }) 
  },
  reStartSearchBLE: function(){ 
   var that = this
  //清除本地数据缓存
  wx.stopBluetoothDevicesDiscovery({
   success: function(res){
    // success
   },
   fail: function(res) {
    // fail
   },
   complete: function(res) {
    // complete
   }
  })
   wx.clearStorageSync();
   clearInterval(that.data.showPosition); 
   console.log(that.data.showPosition);
  // that.context.clearRect(0,0,canvas.width,canvas.height);
   //断开蓝牙
   var that = this
   wx.closeBluetoothAdapter({
    success: function(res){
     // success
     console.log('重置成功');
     //打开蓝牙适配器，如果没有打开 showtoast
   wx.openBluetoothAdapter({
    success: function(res){
     // success
     //获取本机的蓝牙适配器状态
     wx.getBluetoothAdapterState({
      success: function(res){
// success 
     
      },
      fail: function(res) {
// fail 
      },
      complete: function(res) {
// complete
      }
     })
    },
    fail: function(res) {
 },
    complete: function(res) {
     // complete
    }
   })
    },
    fail: function(res) {
     // fail
    },
    complete: function(res) {
     // complete
    }
   })
  }
  //zheli
})

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