Przegląd
W tym samouczku pokazujemy, jak zmienić ikonę znacznika zaawansowanego w Mapach Google, aby użyć niestandardowego obrazu graficznego. Podczas korzystania z tego samouczka warto poznać podstawy tworzenia znaczników.
Na poniższej przykładowej mapie pokazano użycie niestandardowych znaczników do wskazywania różnych typów lokalizacji.
Poniższa sekcja zawiera cały kod, którego potrzebujesz do utworzenia mapy w tym samouczku.
TypeScript
let map: google.maps.Map;
async function initMap() {
// Request needed libraries.
const { Map } = await google.maps.importLibrary("maps") as google.maps.MapsLibrary;
const { AdvancedMarkerElement, PinElement } = await google.maps.importLibrary("marker") as google.maps.MarkerLibrary;
map = new google.maps.Map(document.getElementById("map") as HTMLElement, {
center: new google.maps.LatLng(-33.91722, 151.23064),
zoom: 16,
mapId: "DEMO_MAP_ID",
});
const iconBase =
"https://developers.google.com/maps/documentation/javascript/examples/full/images/";
const icons: Record<string, { icon: string }> = {
parking: {
icon: iconBase + "parking_lot_maps.png",
},
library: {
icon: iconBase + "library_maps.png",
},
info: {
icon: iconBase + "info-i_maps.png",
},
};
const features = [
{
position: new google.maps.LatLng(-33.91721, 151.2263),
type: "info",
},
{
position: new google.maps.LatLng(-33.91539, 151.2282),
type: "info",
},
{
position: new google.maps.LatLng(-33.91747, 151.22912),
type: "info",
},
{
position: new google.maps.LatLng(-33.9191, 151.22907),
type: "info",
},
{
position: new google.maps.LatLng(-33.91725, 151.23011),
type: "info",
},
{
position: new google.maps.LatLng(-33.91872, 151.23089),
type: "info",
},
{
position: new google.maps.LatLng(-33.91784, 151.23094),
type: "info",
},
{
position: new google.maps.LatLng(-33.91682, 151.23149),
type: "info",
},
{
position: new google.maps.LatLng(-33.9179, 151.23463),
type: "info",
},
{
position: new google.maps.LatLng(-33.91666, 151.23468),
type: "info",
},
{
position: new google.maps.LatLng(-33.916988, 151.23364),
type: "info",
},
{
position: new google.maps.LatLng(-33.91662347903106, 151.22879464019775),
type: "parking",
},
{
position: new google.maps.LatLng(-33.916365282092855, 151.22937399734496),
type: "parking",
},
{
position: new google.maps.LatLng(-33.91665018901448, 151.2282474695587),
type: "parking",
},
{
position: new google.maps.LatLng(-33.919543720969806, 151.23112279762267),
type: "parking",
},
{
position: new google.maps.LatLng(-33.91608037421864, 151.23288232673644),
type: "parking",
},
{
position: new google.maps.LatLng(-33.91851096391805, 151.2344058214569),
type: "parking",
},
{
position: new google.maps.LatLng(-33.91818154739766, 151.2346203981781),
type: "parking",
},
{
position: new google.maps.LatLng(-33.91727341958453, 151.23348314155578),
type: "library",
},
];
for (let i = 0; i < features.length; i++) {
const iconImage = document.createElement("img");
iconImage.src = icons[features[i].type].icon;
const marker = new google.maps.marker.AdvancedMarkerElement({
map,
position: features[i].position,
content: iconImage,
})
}
}
initMap();
JavaScript
let map;
async function initMap() {
// Request needed libraries.
const { Map } = await google.maps.importLibrary("maps");
const { AdvancedMarkerElement, PinElement } = await google.maps.importLibrary(
"marker",
);
map = new google.maps.Map(document.getElementById("map"), {
center: new google.maps.LatLng(-33.91722, 151.23064),
zoom: 16,
mapId: "DEMO_MAP_ID",
});
const iconBase =
"https://developers.google.com/maps/documentation/javascript/examples/full/images/";
const icons = {
parking: {
icon: iconBase + "parking_lot_maps.png",
},
library: {
icon: iconBase + "library_maps.png",
},
info: {
icon: iconBase + "info-i_maps.png",
},
};
const features = [
{
position: new google.maps.LatLng(-33.91721, 151.2263),
type: "info",
},
{
position: new google.maps.LatLng(-33.91539, 151.2282),
type: "info",
},
{
position: new google.maps.LatLng(-33.91747, 151.22912),
type: "info",
},
{
position: new google.maps.LatLng(-33.9191, 151.22907),
type: "info",
},
{
position: new google.maps.LatLng(-33.91725, 151.23011),
type: "info",
},
{
position: new google.maps.LatLng(-33.91872, 151.23089),
type: "info",
},
{
position: new google.maps.LatLng(-33.91784, 151.23094),
type: "info",
},
{
position: new google.maps.LatLng(-33.91682, 151.23149),
type: "info",
},
{
position: new google.maps.LatLng(-33.9179, 151.23463),
type: "info",
},
{
position: new google.maps.LatLng(-33.91666, 151.23468),
type: "info",
},
{
position: new google.maps.LatLng(-33.916988, 151.23364),
type: "info",
},
{
position: new google.maps.LatLng(-33.91662347903106, 151.22879464019775),
type: "parking",
},
{
position: new google.maps.LatLng(-33.916365282092855, 151.22937399734496),
type: "parking",
},
{
position: new google.maps.LatLng(-33.91665018901448, 151.2282474695587),
type: "parking",
},
{
position: new google.maps.LatLng(-33.919543720969806, 151.23112279762267),
type: "parking",
},
{
position: new google.maps.LatLng(-33.91608037421864, 151.23288232673644),
type: "parking",
},
{
position: new google.maps.LatLng(-33.91851096391805, 151.2344058214569),
type: "parking",
},
{
position: new google.maps.LatLng(-33.91818154739766, 151.2346203981781),
type: "parking",
},
{
position: new google.maps.LatLng(-33.91727341958453, 151.23348314155578),
type: "library",
},
];
for (let i = 0; i < features.length; i++) {
const iconImage = document.createElement("img");
iconImage.src = icons[features[i].type].icon;
const marker = new google.maps.marker.AdvancedMarkerElement({
map,
position: features[i].position,
content: iconImage,
});
}
}
initMap();
CSS
/*
* Always set the map height explicitly to define the size of the div element
* that contains the map.
*/
#map {
height: 100%;
}
/*
* Optional: Makes the sample page fill the window.
*/
html,
body {
height: 100%;
margin: 0;
padding: 0;
}
HTML
<html>
<head>
<title>Custom Markers</title>
<script src="https://polyfill.io/v3/polyfill.min.js?features=default"></script>
<link rel="stylesheet" type="text/css" href="./style.css" />
<script type="module" src="./index.js"></script>
</head>
<body>
<div id="map"></div>
<!-- prettier-ignore -->
<script>(g=>{var h,a,k,p="The Google Maps JavaScript API",c="google",l="importLibrary",q="__ib__",m=document,b=window;b=b[c]||(b[c]={});var d=b.maps||(b.maps={}),r=new Set,e=new URLSearchParams,u=()=>h||(h=new Promise(async(f,n)=>{await (a=m.createElement("script"));e.set("libraries",[...r]+"");for(k in g)e.set(k.replace(/[A-Z]/g,t=>"_"+t[0].toLowerCase()),g[k]);e.set("callback",c+".maps."+q);a.src=`https://maps.${c}apis.com/maps/api/js?`+e;d[q]=f;a.onerror=()=>h=n(Error(p+" could not load."));a.nonce=m.querySelector("script[nonce]")?.nonce||"";m.head.append(a)}));d[l]?console.warn(p+" only loads once. Ignoring:",g):d[l]=(f,...n)=>r.add(f)&&u().then(()=>d[l](f,...n))})
({key: "AIzaSyB41DRUbKWJHPxaFjMAwdrzWzbVKartNGg", v: "weekly"});</script>
</body>
</html>
Wypróbuj fragment
Dostosowywanie znacznika mapy
Możesz zmienić domyślną czerwoną ikonę znacznika (
) na własny obraz. Poniższy przykład pokazuje, jak zastąpić domyślną ikonę niestandardowym plikiem PNG.
// A marker with a with a URL pointing to a PNG.
const beachFlagImg = document.createElement("img");
beachFlagImg.src =
"https://developers.google.com/maps/documentation/javascript/examples/full/images/beachflag.png";
const beachFlagMarkerView = new AdvancedMarkerElement({
map,
position: { lat: 37.434, lng: -122.082 },
content: beachFlagImg,
title: "A marker using a custom PNG Image",
});
Poznaj jeszcze więcej sposobów tworzenia znaczników z grafiką.
Dostosuj znaczniki według obiektów na mapie
Każde ciekawe miejsce na liście obiektów kampusu ma atrybut type. Zwróć uwagę, że poniższy fragment kodu określa typy parking, library i info. Możesz dostosować ikonę znacznika w zależności od tego, jaki element na mapie type został ustawiony.
const iconBase =
"https://developers.google.com/maps/documentation/javascript/examples/full/images/";
const icons: Record<string, { icon: string }> = {
parking: {
icon: iconBase + "parking_lot_maps.png",
},
library: {
icon: iconBase + "library_maps.png",
},
info: {
icon: iconBase + "info-i_maps.png",
},
};
function addMarker(feature) {
const iconImage = document.createElement("img");
iconImage.src = icons[feature.type].icon;
const marker = new google.maps.marker.AdvancedMarkerElement({
map,
position: feature.position,
content: iconImage,
})
}
addMarker(features[0]);