如何使用当前位置坐标获取（国家）信息？答案

【问题标题】：How to get State (of Country) information using Current Location Coordinates?如何使用当前位置坐标获取（国家）信息？
【发布时间】：2017-07-06 13:49:06
【问题描述】：

如何从位置坐标中获取有关状态的信息？是否有任何第三方框架或 API 可以根据经纬度值提供州/省？

【问题讨论】：

标签： ios objective-c location core-location

【解决方案1】：

在下面的方法中传递更新的 CLLocation 值。您可以从 CLPlacemark

获得各种信息

-(void)getLocationDetails:(CLLocation *)location{
    CLGeocoder *reverseGeocoder = [[CLGeocoder alloc] init];
        [reverseGeocoder reverseGeocodeLocation:location completionHandler:^(NSArray *placemarks, NSError *error) {
        CLPlacemark *myPlacemark = [placemarks objectAtIndex:0];
        NSString *countryCode = myPlacemark.ISOcountryCode;
        NSString *countryName = myPlacemark.country;
        NSString *cityName= myPlacemark.subAdministrativeArea;
        NSLog(@"My country code: %@ and countryName: %@ MyCity: %@", countryCode, countryName, cityName);
    }];
}

【讨论】：

当我尝试 CLLocation location = [[CLLocation alloc] initWithLatitude:19.0760 longitude:72.8777];它给了我 *我的国家代码：IN 和 countryName：印度 MyCity：孟买
给我你正在尝试的纬度经度值。

【解决方案2】：

可以使用 placemark.administrativeArea 获取状态。

CLLocation *loc = [[CLLocation alloc]initWithLatitude:coordinate.latitude longitude:coordinate.longitude
                   ];
[ceo reverseGeocodeLocation:loc
          completionHandler:^(NSArray *placemarks, NSError *error) {
              CLPlacemark *placemark = [placemarks objectAtIndex:0];
              NSLog(@"placemark %@",placemark);
              //String to hold address
              NSString *locatedAt = [[placemark.addressDictionary valueForKey:@"FormattedAddressLines"] componentsJoinedByString:@", "];
              NSLog(@"addressDictionary %@", placemark.addressDictionary);

              NSLog(@"placemark %@",placemark.region);
              NSLog(@"placemark %@",placemark.country);  // Give Country Name
              NSLog(@"placemark %@",placemark.locality); // Extract the city name
              NSLog(@"location %@",placemark.name);
              NSLog(@"location %@",placemark.ocean);
              NSLog(@"location %@",placemark.postalCode);
              NSLog(@"location %@",placemark.subLocality);

              NSLog(@"location %@",placemark.location);
              //Print the location to console
              NSLog(@"I am currently at %@",locatedAt);

               NSLog(@"state name %@",placemark.administrativeArea);
              _City.text=[placemark.addressDictionary objectForKey:@"City"];
              [locationManager stopUpdatingLocation];
          }

 ];
}

【讨论】：

但它只会添加缩写。怎样才能得到state的全名？

【解决方案3】：

您可以使用反向地理代码获取它。见下例：

geocoder = [[CLGeocoder alloc] init];

//newlocation is CLLocation object you need to pass user location there.

[geocoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks, NSError *error) {
        if (error == nil && [placemarks count] > 0) {
            placemark = [placemarks lastObject];
            // placemark.administrativeArea is state of use

        } else {
            NSLog(@"%@", error.debugDescription);
        }
    }];

从 CLPlacemark.h://Placemark 字典中包含用户的其他信息将如下所示。

@property (nonatomic, readonly) NSString *name; // eg. Apple Inc.
@property (nonatomic, readonly) NSString *thoroughfare; // street address, eg. 1 Infinite Loop
@property (nonatomic, readonly) NSString *subThoroughfare; // eg. 1
@property (nonatomic, readonly) NSString *locality; // city, eg. Cupertino
@property (nonatomic, readonly) NSString *subLocality; // neighborhood, common name, eg. Mission District
@property (nonatomic, readonly) NSString *administrativeArea; // state, eg. CA
@property (nonatomic, readonly) NSString *subAdministrativeArea; // county, eg. Santa Clara
@property (nonatomic, readonly) NSString *postalCode; // zip code, eg. 95014
@property (nonatomic, readonly) NSString *ISOcountryCode; // eg. US
@property (nonatomic, readonly) NSString *country; // eg. United States
@property (nonatomic, readonly) NSString *inlandWater; // eg. Lake Tahoe
@property (nonatomic, readonly) NSString *ocean; // eg. Pacific Ocean
@property (nonatomic, readonly) NSArray *areasOfInterest; // eg. Golden Gate Park

【讨论】：