如何检测设备是否朝向特定点方向
我有来自 CLLocation 的当前位置，
还有另一个位置 - 也是 CLLocation。
我想检测我的设备何时前往另一个位置。
（我可以计算这些点之间的距离（以米为单位），但无法计算出
与设备当前航向进行比较的精确角度）
谢谢。
I have my current location from CLLocation,
and I have another location- also an CLLocation.
I would like to detect when my device is heading towards that other location.
(I can calculate the distance in meters between this points- but can't workout
the calculation of an accurate angle to compare with the device current heading)
Thanks.
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使用 CLLocation 的内置
course属性怎么样？How about using CLLocation's built-in
courseproperty?待删除
一种方法可能是不断计算当前位置和目标位置之间的距离。如果距离减小，则您的设备正在向目标移动。
在现实世界的场景中（城市中的汽车，山区国家的汽车，例如瑞士），这是行不通的。您将需要一些通向目标的路径点（例如交叉点）并不断寻找最近的路径点。
To Be deleted
One approach could be to continuously calculate the distance between current location and target location. if the distance decreases, your device is moving towards the the target.
In a real world szenario (car in city, car in mountainous country e.g. Switzerland) this doesn't work. You would need some array of way-points (e.g. intersections) that lead towards the target and continuosly look for the closest waypoint.