我是否可以防止将Leaflet地图移出世界边缘？

Question

有没有办法限制淘汰世界的优势？在这张照片上，棕色是世界，灰色是空虚。我想让它无法像这样平息。

Answer 1

Leaflet允许您使用maxBoundsViscosity选项（值：0到1）控制地图抵抗被拖出边界的程度。将其设置为最大值会禁止完全拖出界限。

var map = new L.Map('map', {
  center: bounds.getCenter(),
  zoom: 5,
  layers: [osm],
  maxBounds: bounds,
  maxBoundsViscosity: 1.0
});

此feature在1.0.0中可用。 relevant pull request包括a working example：

＆＃13;

＆＃13;

var osmUrl = 'http://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png',
  osmAttrib = '&copy; <a href="http://openstreetmap.org/copyright">OpenStreetMap</a> contributors',
  osm1 = L.tileLayer(osmUrl, {
    maxZoom: 18,
    attribution: osmAttrib
  }),
  osm2 = L.tileLayer(osmUrl, {
    maxZoom: 18,
    attribution: osmAttrib
  }),
  bounds = new L.LatLngBounds(new L.LatLng(49.5, -11.3), new L.LatLng(61.2, 2.5));

var map1 = new L.Map('map1', {
  center: bounds.getCenter(),
  zoom: 5,
  layers: [osm1],
  maxBounds: bounds,
  maxBoundsViscosity: 0.75
});

var map2 = new L.Map('map2', {
  center: bounds.getCenter(),
  zoom: 5,
  layers: [osm2],
  maxBounds: bounds,
  maxBoundsViscosity: 1.0
});

var latlngs = L.rectangle(bounds).getLatLngs();
L.polyline(latlngs[0].concat(latlngs[0][0])).addTo(map1);
L.polyline(latlngs[0].concat(latlngs[0][0])).addTo(map2);

＆＃13;

html,
body,
#map {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
}

＆＃13;

<link rel="stylesheet" href="https://unpkg.com/leaflet@1.0.0/dist/leaflet.css" />
<script src="https://unpkg.com/leaflet@1.0.0/dist/leaflet.js"></script>

<h1>Left: Bouncy maxBounds. Right: Not bouncy.</h1>

<div id="map1" style="float: left; width:45%; height: 80%;"></div>
<div id="map2" style="float: left; width:45%; height: 80%;"></div>

＆＃13;

＆＃13;

＆＃13;

Answer 2

这就是我为世界地图解决的问题

var map = L.map('map').setView([51.505, -0.09], 3);
L.tileLayer('http://{s}.tile.osm.org/{z}/{x}/{y}.png').addTo(map);

var southWest = L.latLng(-89.98155760646617, -180),
northEast = L.latLng(89.99346179538875, 180);
var bounds = L.latLngBounds(southWest, northEast);

map.setMaxBounds(bounds);
map.on('drag', function() {
    map.panInsideBounds(bounds, { animate: false });
});

请参阅版本.7.0.7 http://jsfiddle.net/exqar2w4/18/以及版本1.0.3 http://jsfiddle.net/exqar2w4/20/

的工作示例

Answer 3

我使用react-leaflet，因此语法与上面略有不同，但认为显示一些合理的使用范围会有所帮助（上面的答案都没有这样做）。

import Leaflet from 'leaflet'
import { Map as LeafletMap} from 'react-leaflet'

// Set map bounds.
// Allow scroll over the international date line, so users can comfortably zoom into locations near the date line.
const corner1 = Leaflet.latLng(-90, -200)
const corner2 = Leaflet.latLng(90, 200)
const bounds = Leaflet.latLngBounds(corner1, corner2)

然后将其呈现为...

<LeafletMap
  maxBoundsViscosity={1.0}
  maxBounds={bounds}
  {...otherProps}
>