详解微信小程序轨迹回放实现及遇到的坑
(编辑:jimmy 日期: 2024/12/23 浏览:3 次 )
微信小程序轨迹回放主要使用到polyline进行划线操作,以及使用marker去进行小车移动操作。效果图如下:
具体实现代码:
trackplay.wxml文件
<!--pages/tracker/tracker.wxml--> <map id="mymap" longitude="{{mapCenter.longitude}}" latitude="{{mapCenter.latitude}}" scale="{{scale}}" markers="{{markers}}" polyline="{{polylineSettings}}" include-points="polygons" setting="{{mapSettings}}" bindregionchange="updatedMap" max-scale="16"> <cover-view>{{showMessage}}</cover-view> <cover-view class="trackerImage" bindtap="trackerSetting"> <cover-image class="lazy" data-src="/UploadFiles/2021-04-02/{{imageSrc}}">trackplay.js文件
const app = getApp(); Page({ /** * 页面的初始数据 */ data: { mapCtx: null, scale: 14, imageSrc: '/images/tracker/tracker-search.png', imageSpeedAdd: '/images/tracker/speed-add.png', imageSpeedSlow: '/images/tracker/speed-slow.png', imagePause: '/images/tracker/pause.png', imagePlay: '/images/tracker/play.png', mapCenter: { longitude: 113.324520, latitude: 23.099994 }, markers: [{ //标记点用于在地图上显示标记的位置 iconPath: "/images/tracker/car.png", id: 1, width: 25, height: 40, longitude: 113.324520, latitude: 23.099994, rotate: 0, //旋转角度 默认0 anchor: { x: .5, y: .5 }, //经纬度在标注图标的锚点,默认底边中点 {x: .5, y: 1} callout: { //标记点上方的气泡窗口 content: '轨迹回放', color: '#fff', fontSize: 16, borderRadius: 3, borderWidth: 1, borderColor: '#07c160', bgColor: '#fff', padding: 5, textAlign: 'center', display: 'BYCLICK' }, }], polylineSettings: [{ //路线 points: [{latitude: 22.596206, longitude: 113.87317, gpsBearing: 244},{latitude: 22.596216, longitude: 113.873192, gpsBearing: 244},{latitude: 22.596213, longitude: 113.873177, 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244},{latitude: 22.596116, longitude: 113.873053, gpsBearing: 244},{latitude: 22.596097, longitude: 113.873055, gpsBearing: 244},{latitude: 22.596084, longitude: 113.87306, gpsBearing: 244},{latitude: 22.596074, longitude: 113.873069, gpsBearing: 244},{latitude: 22.596062, longitude: 113.873076, gpsBearing: 244},{latitude: 22.596046, longitude: 113.873075, gpsBearing: 244},{latitude: 22.596028, longitude: 113.873072, gpsBearing: 244},{latitude: 22.595997, longitude: 113.873047, gpsBearing: 244},{latitude: 22.595982, longitude: 113.873054, gpsBearing: 244},{latitude: 22.595967, longitude: 113.873067, gpsBearing: 244},{latitude: 22.595971, longitude: 113.873058, gpsBearing: 244},{latitude: 22.595975, longitude: 113.873046, gpsBearing: 244},{latitude: 22.595984, longitude: 113.873035, gpsBearing: 244},{latitude: 22.595992, longitude: 113.87303, gpsBearing: 244},{latitude: 22.59602, longitude: 113.87305, gpsBearing: 244},{latitude: 22.596017, longitude: 113.873057, gpsBearing: 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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', //压盖关系 arrowLine: true //带箭头的线 }], polygons: [], mapSettings: { //统一设置地图配置 skew: 0, //倾斜角度 rotate: 0, //旋转角度 showScale: false, //显示比例尺,工具暂不支持 subKey: '', //个性化地图使用的key layerStyle: 1, //个性化地图配置的 style enableZoom: true, //缩放 enableScroll: true, //拖动 enableRotate: false, //旋转 showCompass: false, //指南针 enable3D: false, //展示3D楼块(工具暂不支持) enableOverlooking: false, //俯视 enableSatellite: false, //卫星图 enableTraffic: false, //实时路况 }, playIndex: 0, showMessage: "", step: 1, duration: 100, maxDuration: 2000, minDuration: 500, isPause: false }, trackPlay: function () { //轨迹接口 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() //轨迹回放 }) }, beginTrack: function () { //轨迹回放 const that = this; let index = that.data.playIndex === 0 "最后点:",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 () { //结束回放 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 }); } }, /** * 生命周期函数--监听页面加载 */ onLoad: function (options) { this.mapCtx = wx.createMapContext('mymap'); this.trackPlay(); }, })这里如果每次移动一个点,就切换一下地图中心点,去跟随车辆位置的话,地图会有抖动的感觉。所以我们做了一个可视化区域的判断,当车出了可视化区域的时候再进行地图中心点的切换。
这里还使用了translateMarker的函数来进行小车偏向角的切换,让小车可以平滑切换。要注意小车图片默认的朝上是向上,相当于正北方向。
目前是实现了轨迹回放功能的,后续我们将继续添加快进和快退的功能。
实现过程中遇到几个小程序bug,暂时无法解决,先记录下来,等微信更新:
1.画轨迹线中borderWidth设置,导致轨迹真机无法显示。
2.地图层级切换导致的轨迹不可见。具体可以参照:https://developers.weixin.qq.com/community/develop/doc/000e8eed2fc20884237a791105b800
以上两个问题都没找到解决办法,有解决办法的可以给我发消息告诉我
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