Javascript 当用户更改位置或坐标时,更新地图上标记的位置
你好!我有一个使用cordova(html和javascript)的本地应用程序。我需要帮助在用户改变位置或坐标改变时实时移动地图上的标记 以下是Javascript 当用户更改位置或坐标时,更新地图上标记的位置,javascript,html,cordova,leaflet,openstreetmap,Javascript,Html,Cordova,Leaflet,Openstreetmap,你好!我有一个使用cordova(html和javascript)的本地应用程序。我需要帮助在用户改变位置或坐标改变时实时移动地图上的标记 以下是mapping.js var mbAttr = 'Map data © <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, ' + '© <a href="https://www.mapbox.c
mapping.js
var mbAttr =
'Map data © <a href="https://www.openstreetmap.org/">OpenStreetMap</a> contributors, ' +
'© <a href="https://www.mapbox.com/">Mapbox</a>',
mbUrl =
"https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token=pk.eyJ1IjoibWFwYm94IiwiYSI6ImNpejY4NXVycTA2emYycXBndHRqcmZ3N3gifQ.rJcFIG214AriISLbB6B5aw";
var redIcon = new L.Icon({
iconUrl:
"https://cdn.rawgit.com/pointhi/leaflet-color-markers/master/img/marker-icon-2x-red.png",
shadowUrl:
"https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/images/marker-shadow.png",
iconSize: [25, 41],
iconAnchor: [12, 41],
popupAnchor: [1, -34],
shadowSize: [41, 41]
});
var violetIcon = new L.Icon({
iconUrl:
"https://cdn.rawgit.com/pointhi/leaflet-color-markers/master/img/marker-icon-2x-violet.png",
shadowUrl:
"https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/images/marker-shadow.png",
iconSize: [35, 51],
iconAnchor: [17, 51],
popupAnchor: [1, -34],
shadowSize: [51, 51]
});
var streets = L.tileLayer(mbUrl, { id: "mapbox.streets", attribution: mbAttr });
var mymap;
var locationHistory = [];
var watch;
function f1(a, b) {
lat = a;
lon = b;
mymap = L.map("mapid", {
center: [14.54965, 121.00737],
zoom: 16,
layers: [streets]
});
L.marker([14.4311, 120.9682], { icon: violetIcon })
.addTo(mymap)
.bindPopup("New Bacoor City Hall");
L.marker([a, b], { icon: redIcon })
.addTo(mymap)
.bindPopup("You are here.")
.openPopup()
.update();
}
function getLocation() {
navigator.geolocation.getCurrentPosition(showPosition, showError);
}
function showPosition(position) {
f1(position.coords.latitude, position.coords.longitude);
}
function showHistory() {
var el = document.getElementById("historyWrapper");
if (el.style.display === "none") {
el.style.display = "block";
} else {
el.style.display = "none";
}
}
function startWatching() {
var toastHTML = "Tracking started...";
M.toast({html: toastHTML, displayLength: 3000});
watch = navigator.geolocation.watchPosition(onSuccess, onError, {
maximumAge: 10000,
timeout: 5000,
enableHighAccuracy: true
});
var el = document.getElementById("historyWrapper");
el.style.display = "none";
}
function stopWatching() {
if (confirm("Do you want to stop tracking?")) {
var toastHTML = "Tracking Stopped.";
M.toast({html: toastHTML, displayLength: 3000});
navigator.geolocation.clearWatch(watch);
var el = document.getElementById("locationHistory");
locationHistory.forEach(function(location) {
el.innerHTML =
"<li>Latitude: " +
location.coords.latitude +
"<br />" +
"Longitude: " +
location.coords.longitude +
"<br />" +
"<strong>Date: " +
new Date().toLocaleString() +
"</strong><hr /></li>" +
el.innerHTML;
});
document.getElementById("historyWrapper").style.display = "block";
document.getElementById("geolocation").innerHTML = "";
}
}
function showError(error) {
switch (error.code) {
case error.PERMISSION_DENIED:
var toastHTML = "User denied the request for geolocation.";
M.toast({html: toastHTML, displayLength: 3000});
break;
case error.POSITION_UNAVAILABLE:
var toastHTML = "Location information is unavailable.";
M.toast({html: toastHTML, displayLength: 3000});
break;
case error.TIMEOUT:
var toastHTML = "The request to get user location timed out.";
M.toast({html: toastHTML, displayLength: 3000});
break;
case error.UNKNOWN_ERROR:
var toastHTML = "An unknown error occurred.";
M.toast({html: toastHTML, displayLength: 3000});
break;
}
window.close();
}
function onSuccess(position) {
locationHistory.push(position);
var element = document.getElementById("geolocation");
element.innerHTML = "";
element.innerHTML =
"Latitude: " +
position.coords.latitude +
"<br />" +
"Longitude: " +
position.coords.longitude +
"<br />" +
"<hr />" +
element.innerHTML;
}
function onError(error) {
var toastHTML = "code: " + error.code + "\n" + "message: " + error.message + "\n";
M.toast({html: toastHTML, displayLength: 3000});
}
getLocation();
var mbAttr=
'地图数据和副本;贡献者,'+
'© ',
mbUrl=
"https://api.tiles.mapbox.com/v4/{id}/{z}/{x}/{y}.png?access_token=pk.eyj1ijoibwwwwym94iiwiysi6imnpejy4nxvycta2emycxbdhrqcmz3n3gifq.rjfig214ariislb6b5aw”;
var redIcon=新的L.图标({
iconUrl:
"https://cdn.rawgit.com/pointhi/leaflet-color-markers/master/img/marker-icon-2x-red.png",
shadowUrl:
"https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/images/marker-shadow.png",
iconSize:[25,41],
iconAnchor:[12,41],
popupAnchor:[1,-34],
阴影大小:[41,41]
});
var violetIcon=新的L.图标({
iconUrl:
"https://cdn.rawgit.com/pointhi/leaflet-color-markers/master/img/marker-icon-2x-violet.png",
shadowUrl:
"https://cdnjs.cloudflare.com/ajax/libs/leaflet/0.7.7/images/marker-shadow.png",
iconSize:[35,51],
iconAnchor:[17,51],
popupAnchor:[1,-34],
阴影大小:[51,51]
});
var streets=L.Tillelayer(mbUrl,{id:“mapbox.streets”,属性:mbAttr});
var-mymap;
var locationHistory=[];
var手表;
函数f1(a,b){
lat=a;
lon=b;
mymap=L.map(“mapid”{
中间:[14.54965121.00737],
缩放:16,
图层:[街道]
});
L.marker([14.4311120.9682],{icon:violetIcon})
.addTo(mymap)
.bindpoop(“新巴库市政厅”);
L.marker([a,b],{icon:redIcon})
.addTo(mymap)
.bindpoop(“您在这里”)
.openPopup()
.update();
}
函数getLocation(){
navigator.geolocation.getCurrentPosition(showPosition,showError);
}
功能显示位置(位置){
f1(位置坐标纬度、位置坐标经度);
}
函数showHistory(){
var el=document.getElementById(“historyWrapper”);
如果(el.style.display==“无”){
el.style.display=“块”;
}否则{
el.style.display=“无”;
}
}
函数startWatching(){
var toastHTML=“跟踪已开始…”;
M.toast({html:toastHTML,displayLength:3000});
watch=navigator.geolocation.watchPosition(onSuccess,onError{
最高限额:10000,
超时:5000,
EnableHighAccurance:正确
});
var el=document.getElementById(“historyWrapper”);
el.style.display=“无”;
}
函数stopWatching(){
如果(确认(“是否要停止跟踪?”){
var toastHTML=“跟踪已停止。”;
M.toast({html:toastHTML,displayLength:3000});
navigator.geolocation.clearWatch(手表);
var el=document.getElementById(“locationHistory”);
locationHistory.forEach(函数(位置){
el.innerHTML=
“纬度:”+
位置坐标纬度+
“
”+
“经度:”+
位置坐标经度+
“
”+
“日期:”+
新日期().toLocaleString()+
“
”+
el.innerHTML;
});
document.getElementById(“historyWrapper”).style.display=“block”;
document.getElementById(“地理位置”).innerHTML=“”;
}
}
功能错误(错误){
开关(错误代码){
案例错误。权限被拒绝:
var toastHTML=“用户拒绝了地理定位请求。”;
M.toast({html:toastHTML,displayLength:3000});
打破
案例错误。位置不可用:
var toastHTML=“位置信息不可用。”;
M.toast({html:toastHTML,displayLength:3000});
打破
大小写错误。超时:
var toastHTML=“获取用户位置的请求超时。”;
M.toast({html:toastHTML,displayLength:3000});
打破
案例错误。未知错误:
var toastHTML=“发生未知错误。”;
M.toast({html:toastHTML,displayLength:3000});
打破
}
window.close();
}
成功时的功能(位置){
位置历史。推(位置);
var element=document.getElementById(“地理位置”);
element.innerHTML=“”;
element.innerHTML=
“纬度:”+
位置坐标纬度+
“
”+
“经度:”+
位置坐标经度+
“
”+
“
”+
element.innerHTML;
}
函数onError(错误){
var toastHTML=“代码:”+error.code+“\n”+“消息:”+error.message+“\n”;
M.toast({html:toastHTML,displayLength:3000});
}
getLocation();
因此,我的html文件中有3个按钮,它们调用js文件中的3个函数-startWatching()
、stopWatching()
和showHistory()
函数startWatching()
将在用户移动或更改位置时监视坐标。
函数stopWatching()
将停止监视或获取坐标。
函数showHistory()
将显示监视的坐标列表
var redIcon
是getLocation()之后用户位置的标记
var violetIcon
是定义位置的标记
函数f1(a,b)
将在地图上显示两个标记-一个标记用于定义的位置,另一个标记是发生函数getLocation()
时用户的位置
现在,当用户改变位置或在地图上生成新坐标时,我需要移动用户位置的标记。我希望有人能在这方面帮助我。提前感谢`您需要在f1
功能之外访问您的用户标记。可以通过将标记分配给全局定义的变量来实现这一点
在全局范围内定义标记变量
var userMarker=null;
在f1
函数中,将创建的标记分配给userMarker
变量
函数f1(a,b){
...
userMarker=L.marker([a,b],{icon:redIcon]