詳解微信小程序軌跡回放實現及遇到的坑

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gpsBearing: 145},{latitude: 22.67152, longitude: 113.831287, gpsBearing: 145},{latitude: 22.671486, longitude: 113.831509, gpsBearing: 77},{latitude: 22.67135, longitude: 113.831558, gpsBearing: 96},{latitude: 22.671349, longitude: 113.831529, gpsBearing: 102},{latitude: 22.671346, longitude: 113.831489, gpsBearing: 95},{latitude: 22.671388, longitude: 113.831372, gpsBearing: 95},{latitude: 22.671386, longitude: 113.831333, gpsBearing: 95},{latitude: 22.671407, longitude: 113.831286, gpsBearing: 95},{latitude: 22.671292, longitude: 113.831228, gpsBearing: 95},{latitude: 22.671025, longitude: 113.831196, gpsBearing: 149},{latitude: 22.671026, longitude: 113.831183, gpsBearing: 180},{latitude: 22.671076, longitude: 113.83113, gpsBearing: 180},{latitude: 22.671119, longitude: 113.831024, gpsBearing: 180},{latitude: 22.67117, longitude: 113.830974, gpsBearing: 180},{latitude: 22.67112, longitude: 113.830935, gpsBearing: 180},{latitude: 22.671233, longitude: 113.830912, gpsBearing: 180},{latitude: 22.671269, longitude: 113.830879, gpsBearing: 180},{latitude: 22.671215, longitude: 113.830906, gpsBearing: 180},{latitude: 22.6712, longitude: 113.830907, gpsBearing: 180},{latitude: 22.671278, longitude: 113.830979, gpsBearing: 180},{latitude: 22.671498, longitude: 113.831101, gpsBearing: 180},{latitude: 22.671705, longitude: 113.831304, gpsBearing: 43},{latitude: 22.671713, longitude: 113.831276, gpsBearing: 297},{latitude: 22.67165, longitude: 113.831221, gpsBearing: 298},{latitude: 22.671617, longitude: 113.83117, gpsBearing: 312},{latitude: 22.671463, longitude: 113.831156, gpsBearing: 326},{latitude: 22.671413, longitude: 113.831106, gpsBearing: 339},{latitude: 22.671225, longitude: 113.831049, gpsBearing: 353},{latitude: 22.670929, longitude: 113.830936, gpsBearing: 99},{latitude: 22.670841, longitude: 113.83088, gpsBearing: 225},{latitude: 22.671066, longitude: 113.830904, gpsBearing: 231},{latitude: 22.671164, longitude: 113.830972, gpsBearing: 20},{latitude: 22.671189, longitude: 113.83107, gpsBearing: 22},{latitude: 22.671145, longitude: 113.831111, gpsBearing: 29},{latitude: 22.671133, longitude: 113.830951, gpsBearing: 34},{latitude: 22.671185, longitude: 113.830818, gpsBearing: 29},{latitude: 22.671209, longitude: 113.830802, gpsBearing: 348},{latitude: 22.671145, longitude: 113.830834, gpsBearing: 348},{latitude: 22.67109, longitude: 113.830825, gpsBearing: 348},{latitude: 22.671034, longitude: 113.830765, gpsBearing: 348},{latitude: 22.671065, longitude: 113.830838, gpsBearing: 348},{latitude: 22.671175, longitude: 113.830935, gpsBearing: 348},{latitude: 22.671178, longitude: 113.830935, gpsBearing: 348},{latitude: 22.671248, longitude: 113.830893, gpsBearing: 348},{latitude: 22.671134, longitude: 113.83089, gpsBearing: 348},{latitude: 22.671147, longitude: 113.830964, gpsBearing: 348},{latitude: 22.671283, longitude: 113.831064, gpsBearing: 348},{latitude: 22.671341, longitude: 113.831058, gpsBearing: 348}],
   color: "#7b7af8",
   width: 5,
   //borderWidth: 2,
   borderColor: '#7b7af8',
   level: 'abovebuildings',   //壓蓋關系
   arrowLine: true        //帶箭頭的線
  }],
  polygons: [],
  mapSettings: {        //統一設置地圖配置
   skew: 0,         //傾斜角度
   rotate: 0,        //旋轉角度
   showScale: false,     //顯示比例尺，工具暫不支持
   subKey: '',        //個性化地圖使用的key
   layerStyle: 1,      //個性化地圖配置的 style
   enableZoom: true,     //縮放
   enableScroll: true,    //拖動
   enableRotate: false,   //旋轉
   showCompass: false,     //指南針
   enable3D: false,      //展示3D樓塊(工具暫不支持）
   enableOverlooking: false,  //俯視
   enableSatellite: false,   //衛星圖
   enableTraffic: false,    //實時路況
  },
  playIndex: 0,
  showMessage: "",
  step: 1,
  duration: 100,
  maxDuration: 2000,
  minDuration: 500,
  isPause: false
 },
 trackPlay: function () { //軌跡接口
  const that = this;
  const points = this.data.polylineSettings[0].points;
  that.setData({
   'markers[0].latitude': points[0].latitude,
   'markers[0].longitude': points[0].longitude,
   mapCenter: points[0],
  }, function () {
   that.mapCtx.translateMarker({
    markerId: 1,
    autoRotate: true,
    moveWithRotate: true,
    duration: 1000,
    destination: points[0]
   })
   that.beginTrack() //軌跡回放
  })
 },
 beginTrack: function () { //軌跡回放
  const that = this;
  let index = that.data.playIndex === 0 ? 0 : that.data.playIndex;
  let points = this.data.polylineSettings[0].points;
  let duration = that.data.duration;

  //this.play();
  that.data.trackTimer = setInterval(function () {
   const point = points[index];
   that.data.lastPoint = point;
   //console.log("最後點:",that.data.lastPoint);
   // console.log(point,that.getCurrentTime());
   that.mapCtx.translateMarker({
    markerId: 1,
    autoRotate: false,
    moveWithRotate: true,
    duration: duration,
    destination: point,
    rotate: point.gpsBearing,
    fail: function (res) {
     console.log(res);
    },
    success: function () {
     that.setData({
      playIndex: index,
      showMessage: point.latitude + "," + point.longitude + "," + point.gpsBearing + "," + points.length + "," + index
     })
     that.mapCtx.getRegion({
      success: function (e) {
       if (that.checkOutRegion(point, e.southwest, e.northeast)) {
        that.setData({
         mapCenter: point,
        })
       }
      }
     });
     if (index + 1 >= points.length) {
      that.stopTrack()
     }
     index++;
    }
   })

  }, duration);
 },
 stopTrack: function () { //結束回放
  const that = this;
  let points = this.data.polylineSettings[0].points;
  that.setData({
   playIndex: 0,
   'markers[0].latitude': points[0].latitude,
   'markers[0].longitude': points[0].longitude,
  });
  clearInterval(that.data.trackTimer);
 },
 checkOutRegion: function (point, southwest, northeast) {
  // console.log(point,southwest,northeast);
  if (point.longitude < southwest.longitude || point.latitude < southwest.latitude) {
   return true;
  }
  if (point.longitude > northeast.longitude || point.latitude > northeast.latitude) {
   return true;
  }
  return false;
 },
 trackerPause: function () {
  if (!this.data.isPause) {
   clearInterval(this.data.trackTimer);
   this.setData({
    isPause: true
   });
  }

 },
 trackerPlay: function () {
  if (this.data.isPause) {
   this.beginTrack();
   this.setData({
    isPause: false
   });
  }

 },
 /**
  * 生命周期函數--監聽頁面加載
  */
 onLoad: function (options) {
  this.mapCtx = wx.createMapContext('mymap');
  this.trackPlay();
 },
})