iOS 8: simulator: location manager authorization dialogue fails to appear

I have found the following solution explaining how to utilize location services in iOS 8. Unfortunately I have got only an iPhone 6 simulator and not the real device. I tried to add this code in the viewDidLoad method but the authorization dialog is never shown. Why is this?

I added a breakpoint in the following, it gets executed but does not show the dialouge..:

    // Will open an confirm dialog to get user's approval
    [locationManager requestAlwaysAuthorization];

And here is the full viewDidLoad method:

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    // Initialize location manager
locationManager = [CLLocationManager new];

float system = [[[UIDevice currentDevice] systemVersion] floatValue ];

if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0 &&
    [CLLocationManager authorizationStatus] != kCLAuthorizationStatusAuthorizedAlways
    ) {
    // Will open an confirm dialog to get user's approval
    [locationManager requestAlwaysAuthorization];
} else {
    [locationManager startUpdatingLocation]; //Will update location immediately
}
locationManager.desiredAccuracy = kCLLocationAccuracyBest;