Google Maps v3 - 为什么LatLngBounds.contains返回false

Question

我有以下代码,我希望contains方法返回true,但它返回false:

var bounds = new google.maps.LatLngBounds(
    new google.maps.LatLng(55.38942944437183, -2.7379201682812226),
    new google.maps.LatLng(54.69726685890506, -1.2456105979687226)
);

var center = bounds.getCenter();  // (55.04334815163844, -1.9917653831249726)

var x = bounds.contains(center);  // returns false

在同一页面上,map是对Map对象的引用,以下代码按预期返回true:

map.getBounds().contains(map.getBounds().getCenter())

为什么我的电话bounds.contains会回复假？

Answer 1

啊,太棒了.该google.maps.LatLngBounds构造预计西南和东北LatLng参数.我不知何故搞砸了我的坐标,而是通过了NorthWest和SouthEast!

var bounds = new google.maps.LatLngBounds(
    new google.maps.LatLng(54.69726685890506,-2.7379201682812226),
    new google.maps.LatLng(55.38942944437183, -1.2456105979687226)
);

var center = bounds.getCenter();  // still returns (55.04334815163844, -1.9917653831249726)

var x = bounds.contains(center);  // now returns true

获得的经验:getCenter不关心你是否LatLngBounds用NorthWest和SouthEast 创建了,但是如果你想contains返回一个有用的答案,你最好传入建议的SouthWest和NorthEast!

Answer 2

我想这更容易尝试.它对我有用而不必担心NE或SW

var bounds = new google.maps.LatLngBounds();
bounds.extend(54.69726685890506,-2.7379201682812226);
bounds.extend(55.38942944437183, -1.2456105979687226);
var center = bounds.getCenter();  // still returns (55.04334815163844, -1.9917653831249726)
var x = bounds.contains(center);  // now returns true

我知道这篇文章很老,但我来这里寻找答案,所以想到从我学到的东西中更新.