Question

我创建了一个单独的LocationManager类来处理我的应用程序中的位置更新。在第一个视图控制器中，在viewDidLoad中访问共享实例，并调用getCurrentLocation。 “获取用户位置...”将打印到控制台，但从不调用位置管理器上的委托方法didUpdateLocations，并且不会更新位置。我在info.plist中有所需的密钥，并显示预期的权限提示。

我觉得这是一个线程问题LocationManager超出范围，但我不确定，如果有人能指出我正确的方向会很棒！

位置经理：

import Foundation
import CoreLocation

class LocationManager: NSObject, CLLocationManagerDelegate {

static let shared = LocationManager()
var manager: CLLocationManager!

override init() {
    super.init()
    self.manager = CLLocationManager()
    self.manager.delegate = self
    if CLLocationManager.authorizationStatus() == .notDetermined {
        self.manager.requestWhenInUseAuthorization()
    }
    self.manager.desiredAccuracy = kCLLocationAccuracyBest
}


public func getCurrentLocation(){
    print("Getting users location...")
    self.manager.startUpdatingLocation()
}


func locationManager(manager:CLLocationManager, didUpdateLocations locations:[AnyObject]) {
    self.manager.stopUpdatingLocation()
    print("locations = \(locations)")
}

func locationManager(_ manager: CLLocationManager, didFailWithError   error: Error) {
    print(error.localizedDescription)
}}

的ViewController：

import UIKit

class ViewController: UIViewController {

    @IBOutlet weak var titleLabel: UILabel!
    @IBOutlet weak var savedAreasTableView: UITableView!
    @IBOutlet weak var noSavedAreasLabel: UILabel!
    var manager: LocationManager! = LocationManager.shared

    override func viewDidLoad() {
        super.viewDidLoad()
        self.noSavedAreasLabel.text = "You have no saved areas available !\nTo add some, search for a location and then favourite it."

        //Check here to see if user has any favourited areas
        self.savedAreasTableView.isHidden = true
        self.noSavedAreasLabel.isHidden = false
        self.manager.getCurrentLocation()
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()
        // Dispose of any resources that can be recreated.
    }
}

Answer 1

正确的委托功能是：

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

LocationManager singleton didUpdateLocations未被调用

1 个答案: