Question

我从文档中了解到，我们可以使用函数CLLocation找到两个distanceFromLocation:点之间的距离。但我的问题是我没有CLLocation数据类型与我，我有CLLocationCoordinate2D点。那么如何找到两个CLLocationCoordinate2D点之间的距离。我看过帖子post但对我没用。

Answer 1

您应该使用

创建CLLocation对象

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

然后，您应该能够使用

计算距离

[location1 distanceFromLocation:location2];

Answer 2

如果您可以在两点之间获得距离，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。无需按给定CLLocation创建CLLocationCoordinate2D。此定义自iOS 4.0起可用

Answer 3

Swift 4：

extension CLLocation {

    /// Get distance between two points
    ///
    /// - Parameters:
    ///   - from: first point
    ///   - to: second point
    /// - Returns: the distance in meters
    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.distance(to)
    }
}

Answer 4

Swift4：结合以上思路

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)
    }
}

Answer 5

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

简单版的Valleri的回答。除以1000得到KM，然后转换为字符串。

Answer 6

Swift 5 ：用于计算距离的CLLocationCoordinate2D扩展名：

extension CLLocationCoordinate2D {
    /// Returns distance from coordianate in meters.
    /// - Parameter from: coordinate which will be used as end point.
    /// - Returns: Returns distance in meters.
    func distance(from: CLLocationCoordinate2D) -> CLLocationDistance {
        let from = CLLocation(latitude: from.latitude, longitude: from.longitude)
        let to = CLLocation(latitude: self.latitude, longitude: self.longitude)
        return from.distance(from: to)
    }
}

用法：

let coordinate = CLLocationCoordinate2D(latitude: 11, longitude: 39)
let from = CLLocationCoordinate2D(latitude: 30, longitude: 43)
let distance = coordinate.distance(from: from)

Answer 7

MKMetersBetweenMapPoints现在只是MKMapPoint

的实例方法

let coordinate1 = CLLocationCoordinate2D(latitude: lat1, longitude: lon1)
let coordinate2 = CLLocationCoordinate2D(latitude: lat2, longitude: lon2)

let point1 = MKMapPoint(coordinate1)
let point2 = MKMapPoint(coordinate2)
let distance = point1.distance(to: point2)

找到CLLocationCoordinate2D点之间的距离

7 个答案: