Javascript Google Maps v3 - 为什么 LatLngBounds.contains 返回 false
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Google Maps v3 - Why is LatLngBounds.contains returning false
提问by Mario Menger
I have the following code in which I would expect the contains method to return true, but it returns false:
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
On the same page, where map is a reference to the Map object, the following code returns true as expected:
在同一页面上，其中 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())
Why might my call to bounds.containsbe returning false?
为什么我的电话bounds.contains返回错误？
回答by Mario Menger
Ah, brilliant. The google.maps.LatLngBoundsconstructor expects SouthWest and NorthEast LatLngparameters. I have somehow bungled up my coordinates and passed in NorthWest and SouthEast instead!
啊，厉害。该google.maps.LatLngBounds构造预计西南和东北LatLng参数。我不知何故弄错了我的坐标，而是从西北和东南通过了！
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
Lesson learned: getCenterdoesn't care if you created the LatLngBoundswith NorthWest and SouthEast instead, but if you want containsto return a useful answer you better pass in the suggested SouthWest and NorthEast!
经验教训：getCenter并不关心您是否LatLngBounds使用 NorthWest 和 SouthEast创建了，但是如果您想contains返回一个有用的答案，您最好传入建议的 SouthWest 和 NorthEast！
回答by axs
I guess its easier to try this. It works for me without having to worry about NE orSW
我想尝试这个更容易。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
I know this post is old, but I came searching for answers here, so thought of updating from what I have learnt.
我知道这篇文章很旧，但我是来这里寻找答案的，所以想从我学到的东西中更新。
回答by paulalexandru
This is the way that it worked for me:
这是它对我有用的方式：
var bounds = new google.maps.LatLngBounds();
bounds.extend(54.69726685890506,-2.7379201682812226);
bounds.extend(55.38942944437183, -1.2456105979687226);
map.fitBounds(bounds);
