Swift CLLocationManager（didUpdateLocations）被频繁调用

PascalS 发表于 Dev

帕斯卡

谁能解释，为什么委托方法'CLLocationManager（didUpdateLocations）'被调用了4次，尽管我立即停止了更新？我只需要一次当前位置即可：)

import UIKit
import MapKit

class ContactView: UIViewController, CLLocationManagerDelegate {

    let clLocationManager = CLLocationManager()

    var latitude: AnyObject = 0.000000
    var longitude: AnyObject = 0.000000

    override func viewDidLoad() {
        super.viewDidLoad()
        self.nameTextField.delegate = self
        clLocationManager.delegate = self
        clLocationManager.desiredAccuracy = kCLLocationAccuracyBest
        clLocationManager.requestWhenInUseAuthorization()
        clLocationManager.startUpdatingLocation()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
    }

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        CLGeocoder().reverseGeocodeLocation(manager.location!, completionHandler: {
            (placemarks, error) -> Void in
            self.clLocationManager.stopUpdatingLocation()
            if placemarks!.count > 0 {
                self.latitude = (manager.location?.coordinate.latitude)!
                self.longitude = (manager.location?.coordinate.longitude)!
                print(self.latitude)
                print(self.longitude)
            } else {
                print("Error")
            }
        })
    }
}

谢谢！

罗伊84

尝试将stopUpdatingLocation从reverseGeocodeLocation移到外部

 func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
    manager.stopUpdatingLocation()
    CLGeocoder().reverseGeocodeLocation(manager.location!, completionHandler: {
                (placemarks, error) -> Void in
                if placemarks!.count > 0 {
                    self.latitude = (manager.location?.coordinate.latitude)!
                    self.longitude = (manager.location?.coordinate.longitude)!
                    print(self.latitude)
                    print(self.longitude)
                } else {
                    print("Error")
                }
            })
        }
    }