寻找CLLocationCoordinate2D点之间的距离

我从文档中知道我们可以使用函数distanceFromLocation:find两个CLLocation点之间的distanceFromLocation: 。 但我的问题是我没有CLLocation数据types与我，我有CLLocationCoordinate2D点。 那么我怎样才能find两个CLLocationCoordinate2D点之间的距离。 我看过post，但对我没有帮助。

Answer 1

你应该创build一个CLLocation的对象，

 - (id)initWithLatitude:(CLLocationDegrees)latitude longitude:(CLLocationDegrees)longitude; 

现在使用它，你可以find距离。

Answer 2

如果你可以用点之间的距离来计算距离，那么

 CLLocationCoordinate2D coordinate1 = <some value> CLLocationCoordinate2D coordinate2 = <some value> … MKMapPoint point1 = MKMapPointForCoordinate(coordinate1); MKMapPoint point2 = MKMapPointForCoordinate(coordinate2); CLLocationDistance distance = MKMetersBetweenMapPoints(point1, point2); 

将返回两点之间的距离。 无需通过给定CLLocationCoordinate2D创buildCLLocationCoordinate2D 。 这个定义从iOS 4.0开始可用

Answer 3

Swift 3：

 extension CLLocation { // In meteres class func distance(from: CLLocationCoordinate2D, to: CLLocationCoordinate2D) -> CLLocationDistance { let from = CLLocation(latitude: from.latitude, longitude: from.longitude) let to = CLLocation(latitude: to.latitude, longitude: to.longitude) return from.distanceFromLocation(to) } } 

Answer 4

  let point1 = MKMapPointForCoordinate(myLocation) let point2 = MKMapPointForCoordinate(friendLocation) let distance = MKMetersBetweenMapPoints(point1, point2)/1000 let distanceStr = NSString(format: "%.3f", distance) 

简单的版本Valleri的答案。 除以1000以获得KM，然后转换为string。

Answer 5

Swift4：结合以上的想法

 extension CLLocationCoordinate2D { //distance in meters, as explained in CLLoactionDistance definition func distance(from: CLLocationCoordinate2D) -> CLLocationDistance { let destination=CLLocation(latitude:from.latitude,longitude:from.longitude) return CLLocation(latitude: latitude, longitude: longitude).distance(from: destination) } }