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到新公司实习第八天,Boos让我结合百度地图api做一个动态展示标注变化的组件,要求地图展示某一天的标注,时间轴要求可以动态播放每一天的标注变化...然后我就开始coding...
// 创建Map实例,设置地图允许的最小/大级别 var map = this.map; map.centerAndZoom(new BMap.Point(121.365593, 37.528502), 15); // 初始化地图,用城市名设置地图中心点 //map.enableScrollWheelZoom(true); //启用滚轮放大缩小
centerAndZoom(center:Point, zoom:Number)
Point(lng:Number, lat:Number) 以指定的经度和纬度创建一个地理点坐标。
zoom：number 地图缩放级别
结合百度地图api示例Demo 设置点的新图标和添加多个点示例 结合一下，就可以改写成添加多个地图标注
//编写自定义函数,创建标注 addMarker: function(point, label, status) { // var marker = new BMap.Marker(point); var myIcon = new BMap.Icon("images/rubbish_" + status + ".png", new BMap.Size(32, 32), { anchor: new BMap.Size(16, 32), //中心点设置 infoWindowAnchor: new BMap.Size(16, 4) //消息框位置5 }); var marker = new BMap.Marker(point, { icon: myIcon }); TimerLine.map.addOverlay(marker); //跳动的动画 // marker.setAnimation(BMAP_ANIMATION_BOUNCE); marker.setAnimation(BMAP_ANIMATION_DROP); var p = marker.getPosition(); var content = "<table>"; content = content + "<tr><td> 编号：" + label.content + "</td></tr>"; content = content + "<tr><td> 坐标：" + p.lng + "," + p.lat + "</td></tr>"; content = content + "<tr><td> 状态：" + status + "</td></tr>"; content += "</table>"; var infowindow = new BMap.InfoWindow(content); //添加绑定事件 addEvent(marker, ‘click‘, getAttr); function getAttr() { this.openInfoWindow(infowindow); }
}
百度地图标注添加看懂了,接下来就是动态添加标注,并且随和日期的变化而变化,比如展示垃圾箱的动态变化,8.3号清理了颜色为绿色,8.6号没清理为红色..
思想:
1.动态:就要使用ajax异步获取数据
2.变化:就要使用定时器(setInterval或者 setTimeout)
setInterval 循环调用
setTimeout 延迟调用 1次 具体区别可以自行百度
3.动手写插件
function addEvent(dom, type, fn) { //对于支持DOM2级事件处理程序addeventListener方法的浏览器 if (dom.addEventListener) { dom.addEventListener(type, fn, false); } else if (dom.attachEvent) { //对于不支持addEventListener方法但支持attchEvent方法的浏览器 dom.attachEvent(‘on‘ + type, fn); } else { //对于不支持以上两种,但支持on+‘事件名‘的浏览器 dom[‘on‘ + type] = fn; } } var TimerLine = { data: { containerDiv: ‘timerline‘, //容器盒子id datesDiv:‘dates‘,//日期盒子id btnsDiv:‘timerlineBtns‘, btns: { play: "timerbtn-play", stop: "timerbtn-stop", pre:"timerbtn-pre", next:"timerbtn-next" }, processDiv:‘processbar‘, //进度条div }, protect:{ lock_play:false, lock_stop:false, index_label:1, index_process:0 }, rubbish_datas: [], //用来存储ajax获取到的数据 index: 0, //变化的index Interval_label: null, Interval_process:null, map: new BMap.Map("allmap", { minZoom: 14, maxZoom: 20 }), Utils: { //编写自定义函数,创建标注 addMarker: function(point, label, status) { // var marker = new BMap.Marker(point); var myIcon = new BMap.Icon("images/rubbish_" + status + ".png", new BMap.Size(32, 32), { anchor: new BMap.Size(16, 32), //中心点设置 infoWindowAnchor: new BMap.Size(16, 4) //消息框位置5 }); var marker = new BMap.Marker(point, { icon: myIcon }); TimerLine.map.addOverlay(marker); //跳动的动画 // marker.setAnimation(BMAP_ANIMATION_BOUNCE); marker.setAnimation(BMAP_ANIMATION_DROP); var p = marker.getPosition(); var content = "<table>"; content = content + "<tr><td> 编号：" + label.content + "</td></tr>"; content = content + "<tr><td> 坐标：" + p.lng + "," + p.lat + "</td></tr>"; content = content + "<tr><td> 状态：" + status + "</td></tr>"; content += "</table>"; var infowindow = new BMap.InfoWindow(content); //添加绑定事件 addEvent(marker, ‘click‘, getAttr); function getAttr() { this.openInfoWindow(infowindow); } }, /** * 地图标注方法 * 参数: datas:标注物数组{date:"",info:{}} * index:序数(日期) * */ mapSetLabel: function(datas, n,isInterval) { TimerLine.map.clearOverlays(); var index; console.log(TimerLine.protect.index_label); if(isInterval){ TimerLine.protect.index_label++; if (TimerLine.protect.index_label >= TimerLine.rubbish_datas.length - 1) { TimerLine.protect.index_label = TimerLine.rubbish_datas.length - 1; clearInterval(TimerLine.Interval_label); TimerLine.protect.lock_play=false; } } if (n == null) { if(TimerLine.protect.index_label==0){ TimerLine.protect.index_label=1 } index = TimerLine.protect.index_label; } else { index = parseInt(n); TimerLine.protect.index_label = index; } var info = datas[index].info; var info_count=0; var addMarker_Interval=setInterval(function(){ var p = info[info_count].point.split(‘,‘); var p_x = parseFloat(p[0].toString()); //纬度 var p_y = parseFloat(p[1].toString()); //经度 //创建label标签 var label = new BMap.Label(info[info_count].title, { offset: new BMap.Size(20, -10) }); //创建标注点 var point = new BMap.Point(p_x, p_y); //状态(垃圾箱状态) var status = info[info_count].status; //添加标注的方法 TimerLine.Utils.addMarker(point, label, status); info_count++; if(info_count>=info.length){ clearInterval(addMarker_Interval); } },0); }, //添加日期点击事件绑定 dates li click bindEvent: function() { var datesDiv = document.getElementById("dates"); addEvent(datesDiv,‘click‘,function(e){ var event = e || window.e; var target = event.target || event.srcElement; for(var i=0;i<TimerLine.rubbish_datas.length;i++){ if(target.innerText==TimerLine.rubbish_datas[i].date){ // TimerLine.protect.index_process=i; TimerLine.protect.index_label=i; //播放解锁 if(TimerLine.protect.lock_play) TimerLine.protect.lock_play=false; TimerLine.Utils.mapSetLabel(TimerLine.rubbish_datas, i,false); TimerLine.Utils.Setprocess(i,false); return ; } } }) }, //进度条滚动 Setprocess:function(index,isInterval){ if(isInterval){ TimerLine.protect.index_process++; console.log(TimerLine.protect.index_process); console.log(TimerLine.rubbish_datas.length); if(TimerLine.protect.index_process >= TimerLine.rubbish_datas.length-1){ TimerLine.protect.index_process = TimerLine.rubbish_datas.length-1; clearInterval(TimerLine.Interval_process); TimerLine.protect.lock_play=false; } } var datesDiv = document.getElementById("dates"); var processDiv = document.getElementById(TimerLine.data.processDiv); if(index==null){ processDiv.style.width =parseInt(processDiv.style.width)+datesDiv.getElementsByTagName(‘li‘)[0].offsetWidth+‘px‘; }else{ processDiv.style.width =datesDiv.getElementsByTagName(‘li‘)[0].offsetWidth*parseInt(index+1)+‘px‘; } } }, //TimerLine初始化 init: function() { this.createMap(); this.ajaxCreate(); //事件绑定 this.bindEvent(); }, createMap: function() { // 创建Map实例,设置地图允许的最小/大级别 var map = this.map; map.centerAndZoom(new BMap.Point(121.365593, 37.528502), 15); // 初始化地图,用城市名设置地图中心点 //map.enableScrollWheelZoom(true); //启用滚轮放大缩小 }, ajaxCreate: function() { var That = this; var containerDiv = That.data.containerDiv; $.ajax({ type: "get", url: "js/json.json", dataType: ‘json‘, success: function(data) { containerDiv = document.getElementById(containerDiv); //容器id That.rubbish_datas = data.result.datas; // //console.log(That.rubbish_datas); That.create(containerDiv, That.rubbish_datas); //日期时间绑定 That.Utils.bindEvent(); } }); }, create: function(containerDiv, datas) { var That = this; var datasDiv =‘<div class="processcontainer"><div id="processbar" style="width:120px;"></div></div>‘; // var datasDiv = ‘<ul id="dates" class="timerlineul dates clearfix">‘; datasDiv += ‘<ul id="dates" class="timerlineul dates clearfix">‘; for (var i = 0; i < datas.length; i++) { datasDiv += ‘<li>‘ + datas[i].date + ‘</li>‘; } datasDiv += ‘</ul>‘; document.getElementById(That.data.btnsDiv).innerHTML=‘<div class="timerline-btns clearfix"><div id="timerbtn-pre" class="iconfont icon-shangyishou"></div><div id="timerbtn-play" class="iconfont icon-zanting"></div><div id="timerbtn-next" class="iconfont icon-xiayishou"></div></div>‘ //创建第一天的标注 this.Utils.mapSetLabel(datas, 0,false); // console.log(TimerLine.index); That.datas = datas; containerDiv.innerHTML = datasDiv; }, //播放 暂停 委托事件----时间绑定 bindEvent: function() { if (this.data.btns == null) return; var That = this; addEvent(document.getElementById(That.data.btnsDiv), ‘click‘, function(e) { var event = e || window.e; var target = event.target || event.srcElement; //播放事件 if (target.id == That.data.btns.play) { if(!TimerLine.protect.lock_play){ if(TimerLine.protect.index_label >= TimerLine.rubbish_datas.length-1){ TimerLine.protect.index_label=0; var processDiv = document.getElementById(TimerLine.data.processDiv); var datesDiv = document.getElementById("dates"); processDiv.style.width = datesDiv.getElementsByTagName(‘li‘)[0].offsetWidth+‘px‘; } if(TimerLine.protect.index_process >= TimerLine.rubbish_datas.length-1){ TimerLine.protect.index_process=0; } // TimerLine.Interval_label = setInterval("TimerLine.Utils.mapSetLabel(TimerLine.rubbish_datas,null,true)", 1000); TimerLine.Interval_process = setInterval("TimerLine.Utils.Setprocess(null,true)",1000); $("#timerbtn-play").attr("class","iconfont icon-zanting1"); //播放枷锁 TimerLine.protect.lock_play=true; //暂停解锁 TimerLine.protect.lock_stop=false; }else if(TimerLine.protect.lock_play){ $("#timerbtn-play").attr("class","iconfont icon-zanting"); TimerLine.Interval_label&&clearInterval(TimerLine.Interval_label); TimerLine.Interval_process&&clearInterval(TimerLine.Interval_process); //播放解锁 TimerLine.protect.lock_play=false; //暂停加锁 TimerLine.protect.lock_stop=true; } } if(target.id == That.data.btns.pre){ if(TimerLine.protect.index_label==0) return; TimerLine.Utils.mapSetLabel(TimerLine.rubbish_datas, TimerLine.protect.index_label-1,false); TimerLine.Utils.Setprocess(TimerLine.protect.index_process-1,false); TimerLine.protect.index_process=TimerLine.protect.index_process-1; } if(target.id == That.data.btns.next){ if(TimerLine.protect.index_label==TimerLine.rubbish_datas.length-1) return; TimerLine.Utils.mapSetLabel(TimerLine.rubbish_datas, TimerLine.protect.index_label+1,false); TimerLine.Utils.Setprocess(TimerLine.protect.index_process+1,false); TimerLine.protect.index_process=TimerLine.protect.index_process+1; } }); } } TimerLine.init();
以上是我自己手写的组件代码,刚接触设计模式,了解还是一般.本来是想用原型模式写,不过在setInterval时候,方法没法调用原型方法,让后我就改成了单例模式
TimeLine
1.data:数据容器绑定
2.protect 保护属性 (对播放、暂停、时间轴index、标注index)
3.rubbish_datas 存储ajax读取的数据
4.Interval_label 百度地图标注定时器
5.Interval_process 时间轴定时器
6.Utils 工具类
7.init() TimeLine初始化
8.createMap() 创建百度地图
9.ajaxCreate() 获取数据,创建容器(create()),时间绑定(bindEvent())
遇到的问题:
1.两个定时器运行时,公共index 容易读取错误,一个定时器修改了index 另一个定时器还没修改,这样造成了创建标注与当前时间不符合,
注:要将修改公共变量尽量写在一个方法中。公共变量最好不要在多个方法中公用，容易在增减的时候出现不必要的BUG
2.定时器运行到最后一天的时候要将定时器清除。
程序如图：
Demo地址：https://github.com/DemonGao/BaiDuDiTu-TimeLine
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原文地址：http://www.cnblogs.com/demongao/p/5809782.html
