如何根据Swift中当前用户的距离对本地数据数组进行排序

如何解决如何根据Swift中当前用户的距离对本地数据数组进行排序

我有一个模型和一些数据：

class Clinic {
  var name: String
  var lat: Double
  var long: Double

 init(name: String,lat: String,long: String) {
    self.name = name
    self.lat = lat
    self.long = long
 }
 static func fetchClinic() -> [Clinic] {
     var clinicBizs = [Clinic]()
     let clinic1 = Clinic(name: "ABC",lat: 12.000,long: 22.000)
     let clinic2 = Clinic(name: "XYZ",lat: 11.000,long: 25.000)
     let clinic3 = Clinic(name: "ZZZ",lat: 10.000,long: 26.000)
     clinicBizs.append(clinic1)
     clinicBizs.append(clinic2)
     clinicBizs.append(clinic3)
 }
}

在我的 VC 中，我有：

var currentLocation: CLLocationCoordinate2D!

func locationManager(_ manager: CLLocationManager,didUpdateLocations locations: [CLLocation]) {

let location = locations[locations.count - 1]
if location.horizontalAccuracy > 0 {
    locationManager.stopUpdatingLocation()
}

self.currentLocation = CLLocationCoordinate2D(latitude: location.coordinate.latitude,longitude: location.coordinate.longitude) //Print shows current loc

}

如何根据与当前用户的距离对诊所进行排序？

我试过了，但没有用：

        //$0.locations <-I tried to give CLLocation to the model instead of lat and long
//Error: Type of expression is ambiguous without more context
let loc = self.clinics.sorted (by: { $0.locations(from: self. currentLocation!) < $1.locations(from: self. currentLocation!)} )

解决方法

你需要换班诊所

class Clinic {
    var name: String
    var location: CLLocation

    init(name: String,lat: Double,long: Double) {
        self.name = name
        self.location = CLLocation(latitude: lat,longitude: long)
    }

    static func fetchClinic() -> [Clinic] {
        var clinicBizs = [Clinic]()
        let clinic1 = Clinic(name: "ABC",lat: 12.000,long: 22.000)
        let clinic2 = Clinic(name: "XYZ",lat: 11.000,long: 25.000)
        let clinic3 = Clinic(name: "ZZZ",lat: 10.000,long: 26.000)
        clinicBizs.append(clinic1)
        clinicBizs.append(clinic3)
        clinicBizs.append(clinic2)
        return clinicBizs
    }
}

排序

  let current = CLLocation(latitude: currentLocation.latitude,longitude: currentLocation.longitude)
  let loc = self.clinics.sorted (by: { $0.location.distance(from: current) < $1.location.distance(from: current) })