Iphone reverse geographic resolution obtains the user's location information from coordinates

Iphone reverse geographic resolution obtains the user's location information from coordinates

 

1. First, implement the MKReverseGeocoderDelegate delegate.

 

2. The Code is as follows:

// Request reverse geographic location resolution <br/> CLLocationCoordinate2D coordinate; <br/> coordinate. latitude = 122.004; <br/> coordinate. longpolling = 34.115; </p> <p> MKReverseGeocoder * geocoder = [[MKReverseGeocoder alloc] initWithCoordinate: coordinate]; <br/> geocoder. delegate = self; </p> <p> [geocoder start]; 

 

If the geographic information is parsed, the following code is called:

// Obtain the reverse geographic location of the current user <br/>-(void) reverseGeocoder :( MKReverseGeocoder *) geocoder didFindPlacemark :( MKPlacemark *) placemark <br/>{< br/> NSString * sss = [placemark. addressDictionary objectForKey: @ "FormattedAddressLines"]; <br/> if (sss) <br/>{< br/> NSLog (@ "sss = % @", [placemark. addressDictionary objectForKey: @ "FormattedAddressLines"]); <br/>}</p> <p> NSLog (@ "countryCode = % @", placemark. countryCode); <br/> NSLog (@ "Country = % @", placemark. country); <br/> NSLog (@ "administrativeArea = % @", placemark. administrativeArea); <br/> NSLog (@ "subAdministrativeArea = % @", placemark. subAdministrativeArea); <br/> NSLog (@ "locality = % @", placemark. locality); <br/> NSLog (@ "subLocality = % @", placemark. subLocality); <br/> NSLog (@ "thoroughfare = % @", placemark. thoroughfare); <br/> NSLog (@ "subThoroughfare = % @", placemark. subThoroughfare); <br/> NSLog (@ "PostalCode = % @", placemark. postalCode); </p> <p> NSString * addressResult = @ ""; <br/> NSString * beijin = @ "Beijing "; <br/> NSString * shanghai = @ "shanghai City"; <br/> NSString * tianjin = @ "tianjin City"; <br/> NSString * chongqin = @ "Chongqing City "; <br/> if ([placemark. administrativeArea isinclutostring: beijin] | <br/> [placemark. administrativeArea isw.tostring: shanghai] | <br/> [placemark. administrativeArea isw.tostring: tianjin] | <Br/> [placemark. administrativeArea isw.tostring: chongqin] <br/>) <br/>{< br/> addressResult = placemark. locality; <br/>}< br/> else <br/> {<br/> // if it is not China, add the country name <br/> if (placemark. countryCode! = @ "CN") <br/>{< br/> addressResult = [addressResult stringByAppendingString: placemark. country]; <br/> addressResult = [addressResult stringByAppendingString: @ ""]; <br/>}</p> <p> if ([placemark. administrativeArea length]> 0) <br/> {<br/> addressResult = [addressResult stringByAppendingString: @ ""]; <br/> addressResult = [addressResult stringByAppendingString: placemark. administrativeArea]; </p> <p> // if it is not in China Add spaces to each segment <br/> if (placemark. countryCode! = @ "CN") <br/>{< br/> addressResult = [addressResult stringByAppendingString: @ ""]; <br/>}</p> <p> if ([placemark. locality length]> 0) <br/> {<br/> addressResult = [addressResult stringByAppendingString: placemark. locality]; </p> <p> // if it is not China, spaces are directly added to each segment. <br/> if (placemark. countryCode! = @ "CN") <br/>{< br/> addressResult = [addressResult stringByAppendingString: @ ""]; <br/>}</p> <p> if ([placemark. subLocality length]> 0) <br/> {<br/> addressResult = [addressResult stringByAppendingString: placemark. subLocality]; </p> <p> // if not, add spaces to each segment. <br/> if (placemark. countryCode! = @ "CN") <br/>{< br/> addressResult = [addressResult stringByAppendingString: @ ""]; <br/>}</p> <p> if ([placemark. thoroughfare length]> 0) <br/> {<br/> addressResult = [addressResult stringByAppendingString: placemark. thoroughfare]; </p> <p> // if not, spaces are directly added to each segment. <br/> if (placemark. countryCode! = @ "CN") <br/>{< br/> addressResult = [addressResult stringByAppendingString: @ ""]; <br/>}</p> <p> if ([placemark. subThoroughfare length]> 0) <br/> {<br/> addressResult = [addressResult stringByAppendingString: @ ""]; <br/> addressResult = [addressResult stringByAppendingString: placemark. subThoroughfare]; <br/>}</p> <p> NSLog (@ "addressResult = % @", addressResult); <br/>} 

 

If the parsing fails, the following function will be called:

// Obtain the reverse geolocation error of the current user <br/>-(void) reverseGeocoder :( MKReverseGeocoder *) geocoder didFailWithError :( NSError *) error <br/>{< br/> NSLog (@ "ReverseGeocoder error % @", [error description]); </p> <p> [geocoder release]; <br/>}