Question

我正在MKReverseGeocoder使用locationManager's didUpdateToLocation委托但我想知道在Device测试应用时，某些值会变为空。

我的代码是Bellow： -

- (void)viewDidLoad 
{
    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    locationManager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters;
    [locationManager startUpdatingLocation];


     [super viewDidLoad];
}

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    // this creates a MKReverseGeocoder to find a placemark using the found coordinates
    reverseGeocoder = [[MKReverseGeocoder alloc] initWithCoordinate:newLocation.coordinate];
    reverseGeocoder.delegate = self;
    [reverseGeocoder start];
}

- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFailWithError:(NSError *)error
{
    NSLog(@"MKReverseGeocoder has failed.");
}

- (void)reverseGeocoder:(MKReverseGeocoder *)geocoder didFindPlacemark:(MKPlacemark *)placemark
{
    MKPlacemark * myPlacemark = placemark;
    NSString *city = myPlacemark.thoroughfare;
    NSString *subThrough=myPlacemark.subThoroughfare;
    NSString *locality=myPlacemark.locality;
    NSString *subLocality=myPlacemark.subLocality;
    NSString *adminisArea=myPlacemark.administrativeArea;
    NSString *subAdminArea=myPlacemark.subAdministrativeArea;
    NSString *postalCode=myPlacemark.postalCode;
    NSString *country=myPlacemark.country;
    NSString *countryCode=myPlacemark.countryCode;


    NSLog(@"city%@",city);
    NSLog(@"subThrough%@",subThrough);
    NSLog(@"locality%@",locality);
    NSLog(@"subLocality%@",subLocality);
    NSLog(@"adminisArea%@",adminisArea);
    NSLog(@"subAdminArea%@",subAdminArea);
    NSLog(@"postalCode%@",postalCode);
    NSLog(@"country%@",country);
    NSLog(@"countryCode%@",countryCode);

}

输出

cityDrive-in Road

subThrough(null)

locality(null)

subLocality(null)

adminisAreaGujarat

subAdminArea(null)

postalCode(null)

countryIndia

countryCodeIN

使用CLGeocoder

- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation
{
    // this creates a MKReverseGeocoder to find a placemark using the found coordinates
//    reverseGeocoder = [[MKReverseGeocoder alloc] initWithCoordinate:newLocation.coordinate];
//    reverseGeocoder.delegate = self;
//    [reverseGeocoder start];

    CLGeocoder *reverseGeo = [[CLGeocoder alloc] init];

    [reverseGeo reverseGeocodeLocation: newLocation completionHandler:
     ^(NSArray *placemarks, NSError *error) {

         NSLog(@"%@",[placemarks objectAtIndex:0]);
         for (CLPlacemark *placemark in placemarks) {



             NSLog(@"~~~~~~~~%@",placemark.locality);

         }


     }];
}

OUTPUT IS:- ~~~~~~~~(null)

我的上述代码在模拟器中正常工作但在设备中没有... :(请帮助并指导我以正确的方式获取城市名称

Answer 1

你不应该真的使用MKReverseGeocoder，因为在iOS5中苹果已经折旧了，你应该真的使用CLGeocoder。 CLGeocode将返回一个基于NSArray *地标的信息，然后您可以遍历它们并调用assoc数组中的键。请仔细阅读链接。

CLGeoCode Class Reference

Related sample code

iphone： - MKReverseGeocoder获得postalCode，subAdministrativeArea，locality和subThoroughfare的空值

1 个答案: