如何从reverseGeocodeCoordinate获取国家、州、城市？

Question

GMSReverseGeocodeResponse 包含

- (GMSReverseGeocodeResult *)firstResult;

其定义如下：

@interface GMSReverseGeocodeResult : NSObject<NSCopying>

/** Returns the first line of the address. */
- (NSString *)addressLine1;

/** Returns the second line of the address. */
- (NSString *)addressLine2;

@end

有没有办法从这两个字符串中获取国家、ISO 国家代码、州（administrative_area_1 或相应的一个）（对所有国家和所有地址有效>）？

注意：我试图执行这段代码

[[GMSGeocoder geocoder] reverseGeocodeCoordinate:CLLocationCoordinate2DMake(40.4375, -3.6818) completionHandler:^(GMSReverseGeocodeResponse *resp, NSError *error)
 {
    NSLog( @"Error is %@", error) ;
    NSLog( @"%@" , resp.firstResult.addressLine1 ) ;
    NSLog( @"%@" , resp.firstResult.addressLine2 ) ;
 } ] ;

但由于某种原因，处理程序从未被调用过。我确实添加了应用程序密钥，并将 iOS 捆绑包 ID 添加到应用程序密钥。控制台中不会打印任何错误。我的意思是我不知道这些行的内容。

Answer 1

最简单的方法是升级到版本 1.7 Google Maps SDK for iOS（2014 年 2 月发布）。
来自release notes：

GMSGeocoder 现在通过GMSAddress 提供结构化地址，弃用GMSReverseGeocodeResult。

从GMSAddress Class Reference，你可以找到these properties：

coordinate
位置，或kLocationCoordinate2DInvalid（如果未知）。

thoroughfare
街道号码和名称。

locality
地区或城市。

subLocality
地方、地区或公园的细分。

administrativeArea
地区/州/行政区域。

postalCode
邮政编码。

country
国家名称。

lines
包含格式化的地址行的 NSString 数组。

虽然没有 ISO 国家代码。
另请注意，某些属性可能会返回 nil。

这是一个完整的例子：

[[GMSGeocoder geocoder] reverseGeocodeCoordinate:CLLocationCoordinate2DMake(40.4375, -3.6818) completionHandler:^(GMSReverseGeocodeResponse* response, NSError* error) {
    NSLog(@"reverse geocoding results:");
    for(GMSAddress* addressObj in [response results])
    {
        NSLog(@"coordinate.latitude=%f", addressObj.coordinate.latitude);
        NSLog(@"coordinate.longitude=%f", addressObj.coordinate.longitude);
        NSLog(@"thoroughfare=%@", addressObj.thoroughfare);
        NSLog(@"locality=%@", addressObj.locality);
        NSLog(@"subLocality=%@", addressObj.subLocality);
        NSLog(@"administrativeArea=%@", addressObj.administrativeArea);
        NSLog(@"postalCode=%@", addressObj.postalCode);
        NSLog(@"country=%@", addressObj.country);
        NSLog(@"lines=%@", addressObj.lines);
    }
}];

及其输出：

coordinate.latitude=40.437500
coordinate.longitude=-3.681800
thoroughfare=(null)
locality=(null)
subLocality=(null)
administrativeArea=Community of Madrid
postalCode=(null)
country=Spain
lines=(
    "",
    "Community of Madrid, Spain"
)

---

或者，您可以考虑在The Google Geocoding API (example) 中使用Reverse Geocoding。

Answer 2

用 Swift

回答

使用 Google Maps iOS SDK（目前使用 V1.9.2 无法指定返回结果的语言）：

@IBAction func googleMapsiOSSDKReverseGeocoding(sender: UIButton) {
    let aGMSGeocoder: GMSGeocoder = GMSGeocoder()
    aGMSGeocoder.reverseGeocodeCoordinate(CLLocationCoordinate2DMake(self.latitude, self.longitude)) {
        (let gmsReverseGeocodeResponse: GMSReverseGeocodeResponse!, let error: NSError!) -> Void in

        let gmsAddress: GMSAddress = gmsReverseGeocodeResponse.firstResult()
        print("\ncoordinate.latitude=\(gmsAddress.coordinate.latitude)")
        print("coordinate.longitude=\(gmsAddress.coordinate.longitude)")
        print("thoroughfare=\(gmsAddress.thoroughfare)")
        print("locality=\(gmsAddress.locality)")
        print("subLocality=\(gmsAddress.subLocality)")
        print("administrativeArea=\(gmsAddress.administrativeArea)")
        print("postalCode=\(gmsAddress.postalCode)")
        print("country=\(gmsAddress.country)")
        print("lines=\(gmsAddress.lines)")
    }
}

使用 Google Reverse Geocoding API V3（目前可以specify返回结果的语言）：

@IBAction func googleMapsWebServiceGeocodingAPI(sender: UIButton) {
    self.callGoogleReverseGeocodingWebservice(self.currentUserLocation())
}

// #1 - Get the current user's location (latitude, longitude).
private func currentUserLocation() -> CLLocationCoordinate2D {
    // returns current user's location. 
}

// #2 - Call Google Reverse Geocoding Web Service using AFNetworking.
private func callGoogleReverseGeocodingWebservice(let userLocation: CLLocationCoordinate2D) {
    let url = "https://maps.googleapis.com/maps/api/geocode/json?latlng=\(userLocation.latitude),\(userLocation.longitude)&key=\(self.googleMapsiOSAPIKey)&language=\(self.googleReverseGeocodingWebserviceOutputLanguageCode)&result_type=country"

    AFHTTPRequestOperationManager().GET(
        url,
        parameters: nil,
        success: { (operation: AFHTTPRequestOperation!, responseObject: AnyObject!) in
            println("GET user's country request succeeded !!!\n")

            // The goal here was only for me to get the user's iso country code + 
            // the user's Country in english language.
            if let responseObject: AnyObject = responseObject {
                println("responseObject:\n\n\(responseObject)\n\n")
                let rootDictionary = responseObject as! NSDictionary
                if let results = rootDictionary["results"] as? NSArray {
                    if let firstResult = results[0] as? NSDictionary {
                        if let addressComponents = firstResult["address_components"] as? NSArray {
                            if let firstAddressComponent = addressComponents[0] as? NSDictionary {
                                if let longName = firstAddressComponent["long_name"] as? String {
                                    println("long_name: \(longName)")
                                }
                                if let shortName = firstAddressComponent["short_name"] as? String {
                                    println("short_name: \(shortName)")
                                }
                            }
                        }
                    }
                }
            }
        },
        failure: { (operation: AFHTTPRequestOperation!, error: NSError!) in
            println("Error GET user's country request: \(error.localizedDescription)\n")
            println("Error GET user's country request: \(operation.responseString)\n")
        }
    )

}

希望这段代码sn-p和解释对以后的读者有所帮助。

Answer 3

用于美国地址的 Swift 5 版本：

import Foundation
import GoogleMaps

extension GMSAddress {

    var formattedAddress: String {
        let addressComponents = [
            thoroughfare,        // One Infinite Loop
            locality,            // Cupertino
            administrativeArea,  // California
            postalCode           // 95014
        ]
        return addressComponents
            .compactMap { $0 }
            .joined(separator: ", ")
    }

}

Answer 4

在 swift 4.0 中，函数获取 CLLocation 并返回邮政地址

  func geocodeCoordinates(location : CLLocation)->String{
         var postalAddress  = ""
        let geocoder = GMSGeocoder()
        geocoder.reverseGeocodeCoordinate(location.coordinate, completionHandler: {response,error in
            if let gmsAddress = response!.firstResult(){
                for line in  gmsAddress.lines! {
                    postalAddress += line + " "
                }
               return postalAddress
            }
        })
        return ""
    }