iOS 8.3 problems with location - ios

Question

I'm developing an application that uses the user's location. Im using core location.
But in certain screens it does not catch location. The steps are exactly these:
MainViewController:
In MainViewController I request the authorization. It's worked. I allow the authorization to location.
if CLLocationManager.authorizationStatus() == .NotDetermined {
if locationManager.respondsToSelector("requestWhenInUseAuthorization") == true {
locationManager.requestWhenInUseAuthorization()
}
}
ViewController 1:
I touch in option 1, segue to ViewController 1, here i start updating location. It's worked. A catch correct the location.
override func viewDidAppear(animated: Bool) {
locationManager.delegate = self
locationManager.startUpdatingLocation()
}
override func viewDidDisappear(animated: Bool) {
locationManager.stopUpdatingLocation()
NSLog("Location has stopped updating")
}
ViewController 2:
Now I back to MainViewController, and touch to option 2, the view segue to ViewController 2. But here in action button touchHowToGo, dont start updating location, the method has called, but not worked. If i return to ViewController 1 location start normal. Only in this screen not work.
IBAction func touchHowToGo(sender: AnyObject) {
locationManager.delegate = self
locationManager.startUpdatingLocation()
}
In this three View Controllers I'm importing CoreLocation;
In ViewController 1 and ViewController 2 setted CLLocationManagerDelegate;
In .plist I added the key;
In tha app panel settings already on to location WhenInUse;
The app not crash and not didFailError only never update location
Catch location:
In all ViewControllers i used method delegate:
func locationManager(manager: CLLocationManager!, didUpdateToLocation newLocation: CLLocation!, fromLocation oldLocation: CLLocation!) {
NSLog("Location has updated with success %f - %f", newLocation.coordinate.latitude, newLocation.coordinate.longitude)
}
I have tried didUpdateLocations, but without success