Question

是否有可能获得针对给定地理坐标集的最近有意义的地标（例如街道交叉点）的人性化文本描述，例如通过Google地图或其他第三方等网络服务？我正在使用MapKit，~~，但我怀疑它内置了什么~~。 Turns out it does.

例如，我正在寻找像最近的街道交叉路口（实际上这是理想的）或任何类型的“地名”。比如：

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

Answer 1

检查谷歌地图api，我认为这样的事情应该有效：

var geocoder = new google.maps.Geocoder(),
    lat = "12.1234",
    long = "98.7654",
    latlng = new google.maps.LatLng(sLat, sLong);

geocoder.geocode({"latLng":latlng},function(data,status) {
    if(status == google.maps.GeocoderStatus.OK) {
        var add = data[1].formatted_address; //this is the full address

        alert(add);
    }
});

您可以获得“E Hastings St和Main St”以及场地的全名，您只需要为该功能添加更多内容。看看google maps api。

Answer 2

所以我做了一个项目，遇到了我遇到的这个问题...你可以参考苹果开发者网页上的CLPlacemark class reference。

以下是我使用它的方式，我认为你还必须像我一样在项目中添加重置库。

#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，在您执行的任何方式中实施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。

Simulate a location

只有在您构建并运行项目后才会显示。

希望这有助于你：）

继承我得到的输出：

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

修改对不起，我意识到当我写这个答案时你想要更多精确的坐标。

下面：

#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的属性可返回CLPlacemark类所拥有的所有属性。所以在这里，如果你熟悉NSDictionary个对象，我先输出整个字典，然后指定我想记录的值。

希望这有助于您提出确切的问题：）

获得一个友好的位置名称给定一组地理坐标？

2 个答案: