ios8的CLLocationManager代码在ios7中不起作用

之前我使用了一个简单的代码，我没有在这里发布用于gps跟踪的代码，它在iPhone4上运行得非常好。目前，我在viewcontroller.m中使用以下代码获取当前gps位置：

- (void)viewDidLoad {
    [super viewDidLoad];
    [self CurrentLocationIdentifier];
}

-(void)CurrentLocationIdentifier
{
    locationManager = [CLLocationManager new];
    locationManager.delegate = self;
    locationManager.distanceFilter = kCLDistanceFilterNone;
    locationManager.desiredAccuracy = kCLLocationAccuracyBest;

    if (IS_OS_8_OR_LATER)
    {
        [locationManager requestWhenInUseAuthorization];
        [locationManager requestAlwaysAuthorization];
    }

    if ([locationManager respondsToSelector:@selector(requestWhenInUseAuthorization)]) {
        [locationManager requestWhenInUseAuthorization];
    }

    [locationManager startMonitoringSignificantLocationChanges]; 
}


- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations
{
    current = [locations objectAtIndex:0];
    [locationManager stopUpdatingLocation];
    CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
    [geocoder reverseGeocodeLocation:current completionHandler:^(NSArray *placemarks, NSError *error)
     {
         if (!(error))
         {
             CLPlacemark *placemark = [placemarks objectAtIndex:0];
             NSLog(@"\nCurrent Location Detected\n");
             NSLog(@"placemark %@",placemark);
             NSString *locatedAt = [[placemark.addressDictionary valueForKey:@"FormattedAddressLines"] componentsJoinedByString:@", "];
             NSString *Address = [[NSString alloc]initWithString:locatedAt];
             NSString *Area = [[NSString alloc]initWithString:placemark.locality];
             NSString *Country = [[NSString alloc]initWithString:placemark.country];
             NSString *CountryArea = [NSString stringWithFormat:@"%@, %@", Area,Country];
             NSLog(@"Address: %@", Address);
             NSLog(@"CountryArea: %@",CountryArea);
         }
         else
         {
             NSLog(@"Geocode failed with error %@", error);
             NSLog(@"\nCurrent Location Not Detected\n");
         }

     }];
}

---

我用它来支持iPhone 6的gps跟踪。这段代码在iPhone 6和iPhone 4S上获取当前gps位置，但在iPhone 5S和iPhone 6 Plus中没有。我想知道为什么会发生这种情况

不要同时调用RequestWhenUseAuthorization和requestAlwaysAuthorization；只选一个@托尼姆基努：谢谢！！！你找到答案了吗？@简单地告诉我：是的，不要使用[locationManager RequestWhenUseAuthorization]；[locationManager请求始终授权]；同时