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<res.devices.length;i++){ //console.log(res.devices[i].name); if(res.devices[i].name.indexOf('craft')==0){ //console.log(res.devices[i]); arrayRSSI.push(res.devices[i].RSSI); arraydeviceName.push(res.devices[i].name); arraydeviceId[i]= res.devices[i].deviceId; arrayUUIDs[i]= res.devices[i].advertisServiceUUIDs[i]; arrayadvertisData[i]= res.devices[i].advertisData ; 调用计算rssi对应距离的函数 var iRssi = Math.abs(arrayRSSI[i]); var power = (iRssi-59)/(10*2.0); var mm = Math.pow(10, power); console.log(arraydeviceName[i]+"距离的位置是"+mm+"米"); 取01，02，03分别为，（2，0），（2，2），（0，2）固定坐标点，做定位 if(res.devices[i].name.indexOf('craft01')==0){ var pointARSSi = res.devices[i].RSSI ; var iRssi = Math.abs(pointARSSi); var power = (iRssi-55)/(10*2.0); var pointADistance = Math.pow(10, power); console.log("a"+pointADistance); console.log(pointARSSi); } if(res.devices[i].name.indexOf('craft02')==0){ var pointBRSSi = res.devices[i].RSSI; var iRssi = Math.abs(pointBRSSi); var power = (iRssi-55)/(10*2.0); var pointBDistance = Math.pow(10, power); console.log("b"+pointBDistance); console.log(pointBRSSi); } if(res.devices[i].name.indexOf('craft03')==0){ var pointCRSSi = res.devices[i].RSSI; var iRssi = Math.abs(pointCRSSi); var power = (iRssi-57)/(10*2.0); var pointCDistance = Math.pow(10, power); console.log("c"+pointCDistance); console.log(pointCRSSi); } } } // 从 arrayRSSI 取三个距离定位点最近的ibeacon参与定位 if(arrayRSSI.length > 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]<arrayRSSI[j]){ var select = arrayRSSI[i]; arrayRSSI[i] = arrayRSSI[j]; arrayRSSI[j] = select; } } } //获取最近的三个距离 for(var i = 0 ; i < 3; i++){ if(i==0){ var pointARSSi = res.devices[i].RSSI ; var iRssi = Math.abs(pointARSSi); var power = (iRssi-55)/(10*2.0); var pointADistance = Math.pow(10, power); console.log("a"+pointADistance); console.log(pointARSSi); } if(i==1){ var pointBRSSi = res.devices[i].RSSI; var iRssi = Math.abs(pointBRSSi); var power = (iRssi-55)/(10*2.0); var pointBDistance = Math.pow(10, power); console.log("b"+pointBDistance); console.log(pointBRSSi); } if(i==2){ var pointCRSSi = res.devices[i].RSSI; var iRssi = Math.abs(pointCRSSi); var power = (iRssi-57)/(10*2.0); var pointCDistance = Math.pow(10, power); console.log("c"+pointCDistance); console.log(pointCRSSi); } } } //获取定位点的x和y if(!pointADistance==''&&!pointBDistance==''&&!pointCDistance==''){ var pointDX='';var pointDY = ''; var p = Math.pow(pointADistance,2)/10-Math.pow(pointBDistance,2)/10; pointDX = 2.5 - p; var m = Math.pow(pointADistance,2)/10-Math.pow(pointCDistance,2)/10; pointDY = 2.5 - m; console.log('目标所在位置X是'+pointDX); console.log('目标所在位置Y是'+pointDY); if(pointDX > 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 })