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如何在多个视图控制器中使用locationManager()。

cllocationmanager core-location swift ios

-1

fs_tigre · 技术社区 · 6 年前

我需要得到 zipCode 以及 city 在多个视图控制器中。

以下是我目前的做法…

import CoreLocation
let locationManager = CLLocationManager()

class MyViewController: UIViewController, CLLocationManagerDelegate{
    override func viewDidLoad() {
        super.viewDidLoad()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest
        locationManager.requestWhenInUseAuthorization()
    }
}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        CLGeocoder().reverseGeocodeLocation(manager.location!, completionHandler: {(placemarks, error)-> Void in
            if error != nil {
                //AlertView to show the ERROR message
            }

            if placemarks!.count > 0 {
                let placemark = placemarks![0]
                self.locationManager.stopUpdatingLocation()
                let zipCode = placemark.postalCode ?? ""
                let city:String = placemark.locality ?? ""

                // Do something with zipCode
                // Do something with city
            }else{
                print("No placemarks found.")
            }
        })
    }

 func someFunction() {
    locationManager.startUpdatingLocation()
 }

一切都很好,但是正如您在多视图控制器中看到的那样,这样做会导致大量代码重复(当然,我并没有显示整个代码)。

最常见的检索方法是什么? 邮政编码 和 城市 从 CLLocationManager() 以更实际的方式从多个视图控制器?

我想的是…

 MyLocationManager.zipCode() // returns zipCode as a string 
 MyLocationManager.city() // returns city as a string

2 回复 | 直到 6 年前

emrepun 6 年前

我试图实现单件 CLLocationManager 类,我认为您可以修改以下类来实现一些附加方法。

import Foundation

class LocationSingleton: NSObject, CLLocationManagerDelegate {
private let locationManager = CLLocationManager()
private var latitude = 0.0
private var longitude = 0.0

static let shared = LocationSingleton()

private override init() {
    super.init()
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.distanceFilter = kCLLocationAccuracyHundredMeters
    locationManager.requestAlwaysAuthorization() // you might replace this with whenInuse
    locationManager.startUpdatingLocation()
}

func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    if let location = locations.last {
        latitude = location.coordinate.latitude
        longitude = location.coordinate.longitude
    }
}

private func getLatitude() -> CLLocationDegrees {
    return latitude
}

private func getLongitude() -> CLLocationDegrees {
    return longitude
}

private func zipCode() {
    // I think you can figure way out to implemet this method
}

private func city() {
    // I think you can figure way out to implemet this method
}
}