Question

设定：

Xcode 7.3（7D175）
Swift 2
Device是iOS 9.3.1的iPad

我有一个名为LocationUtility的Swift类，我在ViewController中使用它是这样的：

 let locationUtil = LocationUtility()
 locationUtil.initLocationManager()

initLocationManager()函数将CLLocationManager.delegate设置为我的LocationUtility类：

func initLocationManager() {
    seenError = false
    locationFixAchieved = false
    locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest

    locationManager.requestAlwaysAuthorization()

    if CLLocationManager.locationServicesEnabled() {
        locationManager.startUpdatingLocation()
    }
}

永远不会调用以下委托函数：

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

我在NSLocationAlwaysUsageDescription

Info.plist

在我的iPad上，隐私 - ＆gt;位置服务已启用。

我的LocationUtility类是一个放在一起的东西，主要来自其他stackoverflow问题的代码和有关Swift和iOS 8及更高版本中位置功能的答案。从我的角度来看，我在我的APP和设备上都有正确的设置来接收位置信息。

这是我完整的LocationUtility类源代码：

import UIKit
import Foundation
import CoreLocation

class LocationUtility: UIViewController, CLLocationManagerDelegate {
    var locationStatus : NSString = "Not Started"
    var locationManager: CLLocationManager!
    var seenError : Bool = false
    var locationFixAchieved : Bool = false
    var currentLocation:CLLocation? = nil

    func initLocationManager() {
        seenError = false
        locationFixAchieved = false
        locationManager = CLLocationManager()
        locationManager.delegate = self
        locationManager.desiredAccuracy = kCLLocationAccuracyBest

        locationManager.requestAlwaysAuthorization()

        if CLLocationManager.locationServicesEnabled() {
            //locationManager.delegate = self
            //locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
            locationManager.startUpdatingLocation()
        }

    }

    func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
        print("LocationUtility -> didFailWithError()")
        locationManager.stopUpdatingLocation()
        if (seenError == false) {
            seenError = true
            print(error)
        }

    }

    func locationManager(manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        print("LocationUtility -> didUpdateLocations()")
        if (locationFixAchieved == false) {
            locationFixAchieved = true
            //var locationArray = locations as NSArray
            currentLocation = locations.last! as CLLocation
            let coord = currentLocation!.coordinate

            print("user current location")
            print(coord.latitude)
            print(coord.longitude)
        }
    }

    // authorization status
   func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {
            print("LocationUtility -> didChangeAuthorizationStatus()!")

            var shouldIAllow = false

            switch status {
            case CLAuthorizationStatus.Restricted:
                locationStatus = "Restricted Access to location"
            case CLAuthorizationStatus.Denied:
                locationStatus = "User denied access to location"
            case CLAuthorizationStatus.NotDetermined:
                locationStatus = "Status not determined"
            default:
                locationStatus = "Allowed to location Access"
                shouldIAllow = true
            }

            if (shouldIAllow == true) {
                NSLog("Location to Allowed")
                // Start location services
                locationManager.startUpdatingLocation()
            } else {
                NSLog("Denied access: \(locationStatus)")
            }
    }

}

Answer 1

您描述的症状强烈建议您的LocationUtility实例被取消分配，从而取消分配CLLocationManager并停止整个过程。您不清楚LocationUtility实例化的位置，但是您需要确定该实例将保留的位置＆＃34;直播＆＃34;在CLLocationManager做其事情的同时在记忆中。例如，如果取消分配视图控制器，那么它的实例变量将被取消分配，看起来它可能包含您的位置管理器。

您的问题最初询问位置管理员是否必须在应用代理中。当然，它并非如此，但确实必须能够阻止在位置更新过程中将其解除分配。

如果您不确定LocationManager何时被取消分配，请尝试在其上实施deinit并在该方法上设置断点。

使用iOS App，Swift获取设备/用户位置的问题

1 个答案: