小程序腾讯地图轨迹回放

前几天接到一个腾讯地图轨迹回放功能需求，网上百度了一下没什么例子，只好自己研究一下

  先说一下原理，利用points描点做轨迹，接着利用起始锚点进行移动，这里起始锚点设置图标，其他的用透明图标，使用移动方法translateMarker进行移动，通过经纬度计算两点距离，以此设置移动速度，达到匀速移动

总体上没什么技术含量，主要找轨迹点经纬度比较麻烦费时间

下面放代码：

js:

// 全屏地图路线图并动画移动

// polyline中的points可以获取json用来绘制轨迹图

// 获取应用实例

const app = getApp()

Page({

  data: {

    markers: [], // 标记点集合

    polyline: [], // 坐标点集合

    satellite: false, // 是否开启卫星图

    i: 0, // 用于循环，

    points:[]

  },

  onReady: function () {


  },

  onLoad: function () {

    this.setData({

      latitude: 29.532256,

      longitude: 106.556888

    })

    let that = this;

    this.mapCtx = wx.createMapContext('map'); // 创建 map 上下文 MapContext 对象

    that.translateMarker();

  },

  startmove:function()

  {

    this.setData(

      {

        i:0

      }

    );

    this.translateMarker();

  },

  genMarkds:function(indx)

  {

    var reslatitude = 29.544256;

    var reslongitude = 106.586888;

    let points = [

    // {longitude: 106.587188, latitude: 29.544382, iconPath: "/images/mapmarkes.png"},

    { longitude: 106.587891, latitude: 29.544862, iconPath: "/images/mapmarkes.png" },

    // { longitude: 106.588293, latitude: 29.54517, iconPath: "/images/mapmarkes.png" },

    { longitude: 106.588857, latitude: 29.545754, iconPath: "/images/mapmarkes.png" },

    // { longitude: 106.589189, latitude: 29.546221, iconPath: "/images/mapmarkes.png" },

    { longitude: 106.589543, latitude: 29.546879, iconPath: "/images/mapmarkes.png" },

    // { longitude: 106.590214, latitude: 29.548311, iconPath: "/images/mapmarkes.png" },

    { longitude: 106.590562, latitude: 29.548913, iconPath: "/images/mapmarkes.png" },

    // { longitude: 106.591603, latitude: 29.550939, iconPath: "/images/mapmarkes.png" },

    { longitude: 106.59222, latitude: 29.552213, iconPath: "/images/mapmarkes.png" },

    // { longitude: 106.593073, latitude: 29.554056, iconPath: "/images/mapmarkes.png" },

    { longitude: 106.593921, latitude: 29.55581, iconPath: "/images/mapmarkes.png" },

    // { longitude: 106.594269, latitude: 29.556781, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.594591, latitude: 29.558498, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.594645, latitude: 29.560355, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.594634, latitude: 29.563267, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.594044, latitude: 29.567429, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.593776, latitude: 29.569137, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.593229, latitude: 29.570424, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.592896, latitude: 29.571003, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.591877, latitude: 29.572011, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.590739, latitude: 29.573121, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.588883, latitude: 29.574931, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.587939, latitude: 29.576536, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.587392, latitude: 29.576872, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.585675, latitude: 29.577703, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.584967, latitude: 29.578151, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.584592, latitude: 29.578701, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.584206, latitude: 29.579475, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.584388, latitude: 29.58317, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.584431, latitude: 29.584393, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.584399, latitude: 29.58568, iconPath: "/images/mapmarkes.png" },


    //掉头

      { longitude: 106.584098, latitude: 29.585652, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.58412, latitude: 29.583441, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.584088, latitude: 29.58317, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.583906, latitude: 29.579475, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.583992, latitude: 29.578701, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.584367, latitude: 29.578151, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.585375, latitude: 29.577703, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.587092, latitude: 29.576872, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.587639, latitude: 29.576536, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.588583, latitude: 29.574931, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.590439, latitude: 29.573121, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.591577, latitude: 29.572011, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.592596, latitude: 29.571003, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.592929, latitude: 29.570424, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.593476, latitude: 29.569137, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.593744, latitude: 29.567429, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.594334, latitude: 29.563267, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.594345, latitude: 29.560355, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.594291, latitude: 29.558498, iconPath: "/images/mapmarkes.png" },

    //  { longitude: 106.593969, latitude: 29.556781, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.593621, latitude: 29.55581, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.592773, latitude: 29.554056, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.591923, latitude: 29.552213, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.591303, latitude: 29.550939, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.590262, latitude: 29.548913, iconPath: "/images/mapmarkes.png" },

      //{ longitude: 106.589914, latitude: 29.548311, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.589243, latitude: 29.546879, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.588889, latitude: 29.546221, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.588557, latitude: 29.545754, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.587993, latitude: 29.54517, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.587591, latitude: 29.544862, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.585675, latitude: 29.543994, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.577436, latitude: 29.54195, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.573809, latitude: 29.541484, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.56852, latitude: 29.540447, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.567286, latitude: 29.54041, iconPath: "/images/mapmarkes.png" },

      // { longitude: 106.563917, latitude: 29.540858, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.558274, latitude: 29.540055, iconPath: "/images/mapmarkes.png" },

      //{ longitude: 106.554562, latitude: 29.53859, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.551633, latitude: 29.538151, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.544734, latitude: 29.53859, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.542835, latitude: 29.538217, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.541269, latitude: 29.53733, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.537642, latitude: 29.533643, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.536162, latitude: 29.530618, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.534896, latitude: 29.526361, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.534864, latitude: 29.525344, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.535797, latitude: 29.522123, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.536613, latitude: 29.51977, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.53776, latitude: 29.518426, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.539584, latitude: 29.516839, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.540453, latitude: 29.514355, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.544423, latitude: 29.50964, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.550324, latitude: 29.5057, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.551944, latitude: 29.504645, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.5538, latitude: 29.50401, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.553907, latitude: 29.499472, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.556354, latitude: 29.487089, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.555667, latitude: 29.485053, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.553285, latitude: 29.476311, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.550131, latitude: 29.473864, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.540174, latitude: 29.468932, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.536183, latitude: 29.469941, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.531312, latitude: 29.469212, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.526527, latitude: 29.471043, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.524317, latitude: 29.47207, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.524253, latitude: 29.471939, iconPath: "/images/mapmarkes.png" },

      //

      { longitude: 106.524253, latitude: 29.471539, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.524317, latitude: 29.47167, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.526527, latitude: 29.470643, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.531312, latitude: 29.468812, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.536183, latitude: 29.469541, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.540131, latitude: 29.468564, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.550131, latitude: 29.473464, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.553685, latitude: 29.475911, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.556067, latitude: 29.484653, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.556754, latitude: 29.486689, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.554207, latitude: 29.499072, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.5541, latitude: 29.50411, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.552244, latitude: 29.504845, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.550624, latitude: 29.5059, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.544723, latitude: 29.50984, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.540753, latitude: 29.514555, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.539884, latitude: 29.517039, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.53806, latitude: 29.518486, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.536913, latitude: 29.51997, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.536097, latitude: 29.521723, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.535164, latitude: 29.524944, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.535196, latitude: 29.525961, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.536462, latitude: 29.530618, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.538042, latitude: 29.533343, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.541569, latitude: 29.53703, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.542835, latitude: 29.537917, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.544734, latitude: 29.53829, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.551633, latitude: 29.537751, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.558274, latitude: 29.539755, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.567286, latitude: 29.53941, iconPath: "/images/mapmarkes.png" },

      { longitude: 106.573809, latitude: 29.541084, iconPath: "/images/mapmarkes.png" },

    ];

    let markers = points;

    markers.map((value, index) => {

      markers[index].id = index + 1;

      if(index == indx)

      {

        markers[index].iconPath ="/images/point.png";

        markers[index].width = 13;

        markers[index].height=13;

        markers[index].anchor ={x:0.5,y:0.5};

      }

    });

    if (indx==0)

    {

      this.setData({

        polyline: [{

          points: points,

          color: "#FF0000DD",

          width: 5,

          arrowLine:true

        }],

        points: points

      })

      this.setData({

        markers: markers

      })

    }


    return markers;

  },

  // 平移marker，带动画

  translateMarker: function () {

    let that = this;

    let markers = this.genMarkds(that.data.i);

    let markerId = markers[that.data.i].id;

    let destination = {

      longitude: markers[that.data.i + 1].longitude,

      latitude: markers[that.data.i + 1].latitude

    };

    let getDistance = that.getDistance(markers[that.data.i].latitude, markers[that.data.i].longitude, markers[that.data.i + 1].latitude, markers[that.data.i + 1].longitude);

    let duration = getDistance *0.1; // 根据距离计算平移的速度，看起来保持匀速

    this.mapCtx.translateMarker({

      markerId: 1,

      destination: destination,

      autoRotate: false,

      rotate: 0,

      duration: duration,

      success(res) {

        that.setData({

          i: that.data.i + 1

        });

        // 小于长度减1才执行

        if (that.data.i < markers.length - 1) {

          that.translateMarker();

        }

        var passedpoint = [];

        for (var pointsindex = 0; pointsindex < that.data.i; pointsindex++)

        {

          passedpoint.push(that.data.points[pointsindex]);

        }

        that.data.polyline.push({

          points: passedpoint,

          color: "#eeeeee",

          width: 5,

          arrowLine: true

        });


      },

      fail(err) {

        console.log('fail', err)

      }

    })

  },

  // 计算两坐标点之间的距离

  getDistance: function (lat1, lng1, lat2, lng2) {

    let rad1 = lat1 * Math.PI / 180.0;

    let rad2 = lat2 * Math.PI / 180.0;

    let a = rad1 - rad2;

    let b = lng1 * Math.PI / 180.0 - lng2 * Math.PI / 180.0;

    let r = 6378137;

    return (r * 2 * Math.asin(Math.sqrt(Math.pow(Math.sin(a / 2), 2) + Math.cos(rad1) * Math.cos(rad2) * Math.pow(Math.sin(b / 2), 2)))).toFixed(0)

  }

})





wxml:

<view class="mapcontainer">

  <map id="map" longitude="{{longitude}}" latitude="{{latitude}}" scale="12" markers="{{markers}}"

  polyline="{{polyline}}" enable-satellite="{{satellite}}" show-location style="width: 100%; height: 65vh;"></map>

</view>

<view bindtap="startmove">开始</view>

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