travar em setUserTrackingMode com MKMapView quando ampliado
Eu tenho MKMapView com MKUserTrackingModeFollowWithHeading. Mas algo muda o userTrackingMode para MKUserTrackingModeFollow ou None, então eu implementei,
- (void)mapView:(MKMapView *)mapView didChangeUserTrackingMode:(MKUserTrackingMode)mode animated:(BOOL)animated
{
if ([CLLocationManager locationServicesEnabled]) {
if ([CLLocationManager headingAvailable]) {
[self.myMapView setUserTrackingMode:MKUserTrackingModeFollowWithHeading animated:NO];
}else{
[self.myMapView setUserTrackingMode:MKUserTrackingModeFollow animated:NO];
}
}else{
[self.myMapView setUserTrackingMode:MKUserTrackingModeNone animated:NO];
}
}
Tudo está bem, mas toda vez que eu zoom no mapa para o nível mais detalhado, o aplicativo faz com que EXC_BAD_ACCESS na linha setUserTrackingMode: MKUserTrackingModeFollowWithHeading mostrado acima.
O que devo fazer para evitar bater? Eu não quero usar MKUserTrackingBarButtonItem se possível.
A outra parte do mapViewController está abaixo.
- (void)dealloc
{
self.myMapView.delegate = nil;
}
- (void)viewWillDisappear:(BOOL)animated
{
if ([CLLocationManager locationServicesEnabled]) {
self.myMapView.showsUserLocation = NO;
[_locManager stopUpdatingLocation];
if ([CLLocationManager headingAvailable]) {
[_locManager stopUpdatingHeading];
}
}
[super viewWillDisappear:animated];
}
- (void)viewDidAppear:(BOOL)animated
{
if ([CLLocationManager locationServicesEnabled]) {
self.myMapView.showsUserLocation = YES;
[_locManager startUpdatingLocation];
if ([CLLocationManager headingAvailable]) {
[self.myMapView setUserTrackingMode:MKUserTrackingModeFollowWithHeading animated:NO];
[_locManager startUpdatingHeading];
}else{
[self.myMapView setUserTrackingMode:MKUserTrackingModeFollow animated:NO];
}
}else{
[self.myMapView setUserTrackingMode:MKUserTrackingModeNone animated:NO];
}
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewDidAppear:animated];
self.myMapView.delegate = self;
[self.myMapView setFrame:self.view.frame];
self.locManager = [CLLocationManager new];
[self.locManager setDelegate:self];
[self.locManager setDistanceFilter:kCLDistanceFilterNone];
[self.locManager setDesiredAccuracy:kCLLocationAccuracyBest];
[self.locManager setHeadingFilter:3];
[self.locManager setHeadingOrientation:CLDeviceOrientationPortrait];
}
Qualquer tipo de conselho apreciado. Agradeço antecipadamente.
Eu envio o código de amostra mínimo paragithub.