假设MarkerClusterGroup
是react-leaflet-markercluster
包中的一个组件,以下示例演示了如何自动缩放以覆盖可见标记:
function CustomLayer(props) {
const groupRef = useRef(null);
const { markers } = props;
const mapContext = useLeaflet();
const { map} = mapContext; //get map instance
useEffect(() => {
const group = groupRef.current.leafletElement; //get leaflet.markercluster instance
map.fitBounds(group.getBounds()); //zoom to cover visible markers
}, []);
return (
<MarkerClusterGroup ref={groupRef} showCoverageOnHover={false}>
{markers.map(({ fillColor, position, id }) => (
<CircleMarker
fillColor={fillColor}
radius={10}
fillOpacity={1}
key={id}
center={position}
/>
))}
</MarkerClusterGroup>
);
}
用法
function MapExample(props) {
const { markers, center } = props;
return (
<Map center={center} maxZoom={9} zoom={5}>
<TileLayer
url="https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png"
attribution='© <a href="http://osm.org/copyright">OpenStreetMap</a> contributors'
/>
<CustomLayer markers={markers} />
</Map>
);
}