高德地图信息窗体轮播及多组坐标点添加
首先,信息窗体轮播,高德地图同时只能存在一个信息窗体,所以实现轮播只需要一个定时器更新位置就可以,另外信息窗体的关闭我选择的方式是设置不可见,即利用visible属性设置可见不可见
其次,因项目需要,地图上需要展示两个窗体并实现联动轮播,但是信息窗体只能有一个,因此二级信息窗体采用了自定义label来实现,通过对需要展示的坐标点添加label,其他坐标点则清空label
private changeScene(i: any) { this.zoom = 14; this.sceneInfoWindow.visible = true; this.dataNow.scene = this.sceneData[i]; this.center = this.dataNow.scene.position; this.sceneInfoWindow.name = this.dataNow.scene.name; this.sceneInfoWindow.position = this.dataNow.scene.position; this.getSceneLine(); this.getScenePark(); } private changePark(i: any) { const map = this.amapManager.getMap(); this.parkIndex = i; map.remove(this.parkMarkerData); this.parkMarkerData.forEach((v: any) => { v.setLabel({}); }); this.parkMarkerData[i].setLabel({ content: '<div class="info"><div>' + this.parkData[i].parking_name + '</div><div class="infoBody">剩余泊位数:' + this.parkData[i].free_num + '/' + this.parkData[i].open_num + '</div><div class="infoBody">与该景区距离' + (this.parkData[i].distance / 1000).toFixed(2) + 'km</div></div>', offset: new AMap.Pixel(-20, -60), }); map.add(this.parkMarkerData); } private getScene() { apiStationScene().then((res: any) => { if (res.status === 200 && res.data && res.data.rc === 0 && res.data.obj && res.data.obj.length) { const data: any[] = res.data.obj; const marker: any = []; data.forEach((v: any, n: number) => { v.position = [v.lng, v.lat]; marker.push({ id: v.id, position: v.position, text: v.name, index: n, label: {}, icon: 'img/fengjing.png', // events: { // click: () => { // this.changeScene(n); // }, // }, }), v.pic_paths = v.pic_paths.split(','); }); this.markerData = marker; this.sceneData = data; this.changeScene(0); } }); } private getScenePark() { const par = { lng: this.dataNow.scene.lng, lat: this.dataNow.scene.lat, }; apiStationScenePark(par).then((res: any) => { if (res.status === 200 && res.data && res.data.rc === 0 && res.data.obj && res.data.obj.length) { const data: any[] = res.data.obj; this.dataNow.park = data.sort((a, b) => { return b.free_num - a.free_num; }); data.forEach((v: any, n: number) => { v.position = [v.lng, v.lat]; }); this.parkData = data.splice(0, 3); this.addParkMarkers(); } else { this.parkData = []; if (this.parkInerval) { clearInterval(this.parkInerval); this.parkInerval = null; } if (this.parkMarkerData) { const map = this.amapManager.getMap(); map.remove(this.parkMarkerData); this.parkMarkerData = []; } } }); } // 添加停车场坐标点 private addParkMarkers() { if (this.parkInerval) { clearInterval(this.parkInerval); this.parkInerval = null; } const map = this.amapManager.getMap(); map.remove(this.parkMarkerData); const parkMarker: any = []; this.parkData.forEach((v: any, i: any) => { const marker = new AMap.Marker({ position: new AMap.LngLat(v.lng, v.lat), icon: new AMap.Icon({ image: 'img/tingchechang.png', size: new AMap.Size(40, 40), // 图标大小 imageSize: new AMap.Size(40, 40), }), label: { content: i === 0 ? '<div class="info">这里写内容即可,可自定义样式</div>' : '', offset: new AMap.Pixel(-20, -60), }, }); parkMarker.push(marker); }); map.add(parkMarker); this.parkMarkerData = parkMarker; this.parkList(); } // 控制停车场信息滚动 get parkListScroll() { return { singleHeight: 43.75, waitTime: 5000, step: 1, limitMoveNum: 15, }; } // 景点切换 private sceneList() { this.sceneInerval = setInterval(() => { this.nowId++; if (this.nowId > this.sceneData.length) { this.nowId = 0; } this.changeScene(this.nowId); }, 90000); } // 停车场切换 private parkList() { this.parkInerval = setInterval(() => { this.parkId++; if (this.parkId === this.parkMarkerData.length) { this.parkId = 0; clearInterval(this.parkInerval); this.parkInerval = null; this.parkList(); } this.changePark(this.parkId); }, 3000); } private closeSenceWindow() { this.sceneInfoWindow.visible = false; }
另外:关于定时器,在且未声明赋值给一个变量的时候,重复调用会创建新的定时器占用大量内存,赋值给一个变量后重复调用会重置,利用时需要记得清理。
添加label属性时需要重绘坐标点,可直接将准备好的坐标点组对象添加至地图,如通过add添加,重复调用相同的绘点方法,第二次数组转变为坐标点时会报错,因为数组性质发生了变化,变成了地图的坐标点组对象。