根据单选按钮值调用标记
Posted
tags:
篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了根据单选按钮值调用标记相关的知识,希望对你有一定的参考价值。
我试图根据值(年份为字符串)将标记调用到谷歌地图。我想通过点击一下点击事件来监听点击无线电课程时,我可以初始化$.getJSON
并设置年份的值。
如何在单击单选按钮时初始化$.getJSON
调用并将变量yearValue
置于哪个单选按钮上?
此外,如果我想在每次单击一个新的单选按钮时重置标记,我是否需要将所有标记放在一个数组中,将它们设置为地图,然后在检查新的单选按钮值时清除该数组(说我选择2014而不是2015?)。如何在选中新的单选按钮时清除标记,以便我不会同时看到这两个年份?
var map;
var mapProp;
var url = 'https://data.montgomerycountymd.gov/resource/5pue-gfbe.json?$limit=50000';
var count;
var marker;
var manyCategory = [];
var category = [];
var yearValue;
function initMap() {
mapProp = {
center: new google.maps.LatLng(39.154743, -77.240515),
zoom: 10
};
map = new google.maps.Map(document.getElementById('map'), mapProp);
}
function addInfoWindow(marker, message) {
var infoWindow = new google.maps.InfoWindow({
content: message
});
google.maps.event.addListener(marker, 'click', function() {
infoWindow.open(map, marker);
});
}
$(document).ready(function() {
if ($('input:radio[name="year"]').is("checked")) {
yearValue = $(this).val();
}
initMap();
$('.radioClass').on('click', function() {
$.getJSON(url, function(data) {
count = 0;
for (var i = 0; i < data.length; i++) {
var newDate = data[i].inspectiondate;
if (data[i].violation22 === "Out of Compliance" && newDate.slice(0, 4) === yearValue) {
if (data[i].hasOwnProperty('latitude')) {
count++;
var message = "<div>" + data[i].organization + "<br>" + (data[i].inspectiondate).slice(0, 10) + "</div>";
var uniqueIcon;
if (data[i].category === "Private School" || data[i].category === "Public School- Elementary" || data[i].category === "Public School- High" || data[i].category === "Public School- Middle") {
uniqueIcon = "https://maps.gstatic.com/mapfiles/ms2/micons/blue.png";
} else if (data[i].category === "Market" || data[i].category === "Carry Out" || data[i].category === "Snack Bar" || data[i].category === "Caterer" || data[i].category === "Restaurant") {
uniqueIcon = "https://maps.gstatic.com/mapfiles/ms2/micons/purple.png"
} else if (data[i].category === "Nursing Home" || data[i].category === "Hospital" || data[i].category === "Assisted Living") {
uniqueIcon = "https://maps.gstatic.com/mapfiles/ms2/micons/red.png"
} else {
uniqueIcon = "https://maps.gstatic.com/mapfiles/ms2/micons/yellow.png";
}
marker = new google.maps.Marker({
position: new google.maps.LatLng(data[i].location.latitude, data[i].location.longitude),
title: "Hello, world. I received a food violation in 2015",
animation: google.maps.Animation.DROP,
icon: uniqueIcon,
});
marker.setMap(map);
//console.log(data[i].inspectionresults);
addInfoWindow(marker, message);
manyCategory.push(data[i].category);
}
}
}
//;
$.each(manyCategory, function(i, el) {
if ($.inArray(el, category) === -1) category.push(el);
})
//console.log(count);
//console.log(manyCategory);
//console.log(category);
});
});
});
h1,
#icons,
#radioDiv {
text-align: center;
}
#map {
margin: 0 auto;
width: 700px;
height: 400px;
border: 1px solid black;
}
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://maps.googleapis.com/maps/api/js"></script>
<h1>Rodent Violations</h1>
<div id="radioDiv">
<input type="radio" name="year" value="2015" class="radioClass">2015
<input type="radio" name="year" value="2014" class="radioClass">2014
</div>
<div id="icons">
<img src="https://maps.gstatic.com/mapfiles/ms2/micons/blue.png">School
<img src="https://maps.gstatic.com/mapfiles/ms2/micons/purple.png">Restaurant
<img src="https://maps.gstatic.com/mapfiles/ms2/micons/red.png">Healthcare
<img src="https://maps.gstatic.com/mapfiles/ms2/micons/yellow.png">All other
</div>
<div id="map"></div>
答案
您需要一个全局可见的标记数组,其中包含您创建的所有标记,以便在显示新标记之前清除它们。
var myMarkers
添加回调函数的开头清除标记设置映射为null
$.getJSON(url, function(data) {
count = 0;
for (var i = 0; i < myMarkers.length; i++) {
myMarkers[i].setMap(null);
}
myMarkers = []; // empty the array
.......
使用您创建的所有标记填充myMArkers数组
marker.setMap(map);
addInfoWindow(marker, message);
myMarkers.push(marker);
以上是关于根据单选按钮值调用标记的主要内容,如果未能解决你的问题,请参考以下文章