ios - 位置管理器委托(delegate)不叫 iOS swift

Question

我在 info plist 中设置了键 NSLocationAlwaysUsageDescription、NSLocationWhenInUseUsageDescription 并运行下面的代码，委托(delegate)不会被调用，位置弹出窗口有时会出现很短的时间:

类 LocationFinder:NSObject，CLLocationManagerDelegate {

enum LocationSettingStatus : Int
{
    case Value
}

class var sharedInstance: LocationFinder {

    struct Static {
        static var instance: LocationFinder?
        static var token: dispatch_once_t = 0
    }
    dispatch_once(&Static.token) {
        Static.instance = LocationFinder()
    }

    return Static.instance!
}

func checkStatusOfLocationSetting() -> Bool {

    //LocationSettingStatus.Value = 1

    if(CLLocationManager.authorizationStatus() == .NotDetermined || CLLocationManager.locationServicesEnabled() == false)
    {
       return false
    }
    else if(CLLocationManager.authorizationStatus() == .Denied || CLLocationManager.authorizationStatus() == .Restricted || CLLocationManager.locationServicesEnabled() == false )
    {
        return false
    }
    return true

}

func startUpdateLocation()  {

    let locationManager = CLLocationManager()
    locationManager.delegate = self
    locationManager.desiredAccuracy = kCLLocationAccuracyBest
    locationManager.distanceFilter = kCLDistanceFilterNone
    locationManager.requestWhenInUseAuthorization()
    locationManager.startUpdatingLocation()
}




func locationManager(manager: CLLocationManager, didFailWithError error: NSError) {
    print(error)
}

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


func locationManager(manager: CLLocationManager, didChangeAuthorizationStatus status: CLAuthorizationStatus) {

    print(status)
}

Answer 1

您已将位置管理器声明为局部变量，因此它会在方法结束时被销毁:

func startUpdateLocation()  {
    let locationManager = CLLocationManager()
    locationManager.delegate = self
    ...

相反，将其设为实例变量。