iphone - 根据一组地理坐标获取友好的位置名称？

是否有可能通过给定的地理坐标集（例如通过Google地图等网络服务或其他第三方）获得对人类最友好的有意义地标（例如街道交叉路口）的文字描述？我正在使用MapKit，但我怀疑它是否内置任何内容。Turns out it does.

例如，我正在寻找类似最近的街道交叉口（实际上这是理想的选择）或任何种类的“地名”之类的东西。像：

E Hastings St and Main St
128 W Cordova St
PNE Fairgrounds

最佳答案

因此，我完成了一个遇到此确切问题的项目...您可以参考apple开发人员网页中的CLPlacemark class reference。

这是我使用它的方式，我想您也必须像我一样向项目添加corelocation库。

#import <CoreLocation/CoreLocation.h>

现在在.h file:

添加CLLocation委托：<CLLocationManagerDelegate>

然后添加以下实例变量：

CLLocationManager *locationManager;
CLLocation *currentLocation;

现在在.m file:

-(void) viewDidLoad{
    locationManager = [[CLLocationManager alloc] init];
    locationManager.delegate = self;
    locationManager.distanceFilter = kCLDistanceFilterNone; // whenever we move, location is updated
    locationManager.desiredAccuracy = kCLLocationAccuracyBest; // get best current locaton coords
    locationManager.headingFilter = 1;
    [locationManager startUpdatingLocation];
    [locationManager startUpdatingHeading];
}

现在，在CLLocationManager方法之后或之前，以您认为合适的方式实现viewDidLoad委托方法：

#pragma mark CLLocationManager Delegate
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
    currentLocation = [locations objectAtIndex:0];
    [locationManager stopUpdatingLocation];
    NSLog(@"Detected Location : %f, %f", currentLocation.coordinate.latitude, currentLocation.coordinate.longitude);
    CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
    [geocoder reverseGeocodeLocation:currentLocation
                   completionHandler:^(NSArray *placemarks, NSError *error) {
                       if (error){
                           NSLog(@"Geocode failed with error: %@", error);
                           return;
                       }
                       CLPlacemark *placemark = [placemarks objectAtIndex:0];
                       NSLog(@"City = %@ : State = %@ : Country = %@ : Zip Code = %@", placemark.locality, placemark.administrativeArea, placemark.ISOcountryCode, placemark.postalCode);
                   }];
}

运行代码，并确保如果您使用iOS模拟器，请确保通过单击控制台输出屏幕上方的箭头按钮来模拟位置。



仅在构建并运行项目后才会显示。

希望这对您有帮助:)

这是我得到的输出：

2013-08-02 20:39:46.935 PowerOneApp[3449:c07] Detected Location : 37.785834, -122.406417
2013-08-02 20:39:49.773 PowerOneApp[3449:c07] City = San Francisco : State = California : Country = US : Zip Code = 94115

编辑
抱歉，写此答案时，我意识到您需要更多精确的坐标。

这里：

#pragma mark CLLocationManager Delegate
- (void)locationManager:(CLLocationManager *)manager didUpdateLocations:(NSArray *)locations {
    currentLocation = [locations objectAtIndex:0];
    [locationManager stopUpdatingLocation];
    NSLog(@"Detected Location : %f, %f", currentLocation.coordinate.latitude, currentLocation.coordinate.longitude);
    CLGeocoder *geocoder = [[CLGeocoder alloc] init] ;
    [geocoder reverseGeocodeLocation:currentLocation
                   completionHandler:^(NSArray *placemarks, NSError *error) {
                       if (error){
                           NSLog(@"Geocode failed with error: %@", error);
                           return;
                       }
                       CLPlacemark *placemark = [placemarks objectAtIndex:0];
                       NSLog(@"%@", placemark.addressDictionary);
                       NSLog(@"%@", [placemark.addressDictionary valueForKey:@"Street"]);
                   }];
}

继承人的输出：

2013-08-02 20:44:26.052 PowerOneApp[3531:c07] Detected Location : 37.785834, -122.406417
2013-08-02 20:44:26.340 PowerOneApp[3531:c07] {
    City = "San Francisco";
    Country = "United States";
    CountryCode = US;
    FormattedAddressLines =     (
        "Apple Store, San Francisco",
        "1800 Ellis St",
        "San Francisco, CA  94115-4004",
        "United States"
    );
    Name = "Apple Store, San Francisco";
    PostCodeExtension = 4004;
    State = California;
    Street = "1800 Ellis St";
    SubAdministrativeArea = "San Francisco";
    SubLocality = "Union Square";
    SubThoroughfare = 1800;
    Thoroughfare = "Ellis St";
    ZIP = 94115;
}
2013-08-02 20:44:26.340 PowerOneApp[3531:c07] 1800 Ellis St

如您所见，有一个名为addressDictionary的属性，该属性返回CLPlacemark类拥有的所有属性。因此，在这里，如果您熟悉NSDictionary对象，那么我只是先输出整个字典，然后指定要记录的值。

希望这可以帮助您解决确切的问题:)