ios - 给定两组坐标，如何计算它们之间的距离？

Question

假设我有两点:

var lat1 =  37.7833 
var lon1 = -122.4167
var lat2 =  39.4811 
var lon2 = -118.9558

如何最简单地计算它们之间的距离？ (考虑到地球的曲率)

我调查了 this答案，但是 CCLocation 在 Swift 2.0 中没有初始化器

Answer 1

let coord1 = CLLocation(latitude: 37.7833, longitude: -122.4167)
let coord2 = CLLocation(latitude: 39.4811, longitude: -118.9558)
let distance = coord1.distance(from: coord2)

print("the distance between the two points is: \(distance) meters")