Question

我目前正在尝试设置自定义Google地图的边界，以便用户无法缩小太远（到世界地图开始水平平铺的位置），并且无法垂直拖动太远以避免{{3问题。

我已经添加了设置边界的代码，但是我似乎根本无法拖动（取消注释边界代码以重新创建）。基本上我只想让界限成为世界地图以避免上面截图中的问题。我错过了哪些明显的东西？

＆＃13;

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Document</title>

<style>
	#map_canvas {
		width: 100%;
		height: 650px;
	} // #map
</style>
</head>
<body>
<div id="map_canvas"></div>

<script type="text/javascript" src="https://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
function CoordMapType(tileSize) {
	this.tileSize = tileSize;
}

CoordMapType.prototype.getTile = function(coord, zoom, ownerDocument) {
		var div = ownerDocument.createElement('DIV');
		
	div.style.width = this.tileSize.width + 'px';
	div.style.height = this.tileSize.height + 'px';
	div.style.backgroundImage = 'url(http://www.transparenttextures.com/patterns/dark-denim-3.png)';
		
	return div;
};

var map;
var mullem = new google.maps.LatLng(50.3873733,7.4952241);

function initialize() {
	var latlng = new google.maps.LatLng(50.3873733,7.4952241);
	var myOptions = {
			disableDefaultUI: true,
						zoom: 2
	};

	var map = new google.maps.Map(document.getElementById("map_canvas"),
			myOptions);
	var myLatLng = new google.maps.LatLng(50.3869012,  7.4950149);
	var marker = new google.maps.Marker({
		position: new google.maps.LatLng(40.6700, -73.9400),
							map: map,
							icon: 'images/map-marker.png',
							zIndex: 999999
					});

	map.setCenter(new google.maps.LatLng(51.508742,-0.120850));

	// MAP BOUNDS
	/*var allowedBounds = new google.maps.LatLngBounds(
			 new google.maps.LatLng(83.829945, 160.839844), 
			 new google.maps.LatLng(-72.711903, -165.058594)
	);
	var lastValidCenter = map.getCenter();

		google.maps.event.addListener(map, 'center_changed', function() {
			if (allowedBounds.contains(map.getCenter())) {
					// still within valid bounds, so save the last valid position
					lastValidCenter = map.getCenter();
					return; 
			}

			// not valid anymore => return to last valid position
			map.panTo(lastValidCenter);
	});*/
	// MAP BOUNDS - END
	

		map.overlayMapTypes.insertAt(0, new CoordMapType(new google.maps.Size(256, 256)));
	}

	google.maps.event.addDomListener(window, 'load', initialize);

</script>
</body>
</html>

＆＃13;

Answer 1

来自the documentation：

LatLngBounds（sw？：LatLng | LatLngLiteral，ne？：LatLng | LatLngLiteral）从其西南角和东北角的点构造一个矩形。

你的界限是倒退的：

var allowedBounds = new google.maps.LatLngBounds(
         new google.maps.LatLng(83.829945, 160.839844),  // NE
         new google.maps.LatLng(-72.711903, -165.058594) // SW
);

应该是：

var allowedBounds = new google.maps.LatLngBounds(
         new google.maps.LatLng(-72.711903, -165.058594), // SW
         new google.maps.LatLng(83.829945, 160.839844)    // NE
);

proof of concept fiddle

代码段

function CoordMapType(tileSize) {
  this.tileSize = tileSize;
}

CoordMapType.prototype.getTile = function(coord, zoom, ownerDocument) {
  var div = ownerDocument.createElement('DIV');

  div.style.width = this.tileSize.width + 'px';
  div.style.height = this.tileSize.height + 'px';
  div.style.backgroundImage = 'url(http://www.transparenttextures.com/patterns/dark-denim-3.png)';

  return div;
};

var map;
var mullem = new google.maps.LatLng(50.3873733, 7.4952241);

function initialize() {
  var latlng = new google.maps.LatLng(50.3873733, 7.4952241);
  var myOptions = {
    disableDefaultUI: true,
    zoom: 2
  };

  var map = new google.maps.Map(document.getElementById("map_canvas"),
    myOptions);
  var myLatLng = new google.maps.LatLng(50.3869012, 7.4950149);
  var marker = new google.maps.Marker({
    position: new google.maps.LatLng(40.6700, -73.9400),
    map: map,
    icon: 'http://maps.google.com/mapfiles/ms/micons/blue.png',
    zIndex: 999999
  });

  map.setCenter(new google.maps.LatLng(51.508742, -0.120850));

  // MAP BOUNDS
  //   LatLngBounds(sw?:LatLng|LatLngLiteral, ne?:LatLng|LatLngLiteral)	Constructs a rectangle from the points at its south-west and north-east corners.
  var allowedBounds = new google.maps.LatLngBounds(
    new google.maps.LatLng(-72.711903, -165.058594), // SW
    new google.maps.LatLng(73.829945, 160.839844) // NE
  );
  var lastValidCenter = map.getCenter();

  google.maps.event.addListener(map, 'center_changed', function() {
    if (allowedBounds.contains(map.getCenter())) {
      // still within valid bounds, so save the last valid position
      lastValidCenter = map.getCenter();
      return;
    }

    // not valid anymore => return to last valid position
    map.panTo(lastValidCenter);
  });
  // MAP BOUNDS - END


  map.overlayMapTypes.insertAt(0, new CoordMapType(new google.maps.Size(256, 256)));
}

google.maps.event.addDomListener(window, 'load', initialize);

html,
body,
#map_canvas {
  width: 100%;
  height: 100%;
}
// #map

<script src="https://maps.googleapis.com/maps/api/js"></script>
<div id="map_canvas"></div>

谷歌地图边界不起作用

1 个答案: