如何實現獲取緯度和經度的代碼？

大家好，如何獲取位置的緯度和經度值？我正在嘗試使用下面的代碼，但我得到錯誤的迴應，我需要你的幫助來解決問題。如何實現獲取緯度和經度的代碼？

- (CLLocationCoordinate2D) geoCodeUsingAddress:(NSString *)address 
{ 
NSString *city,*state,*zip; 

[email protected]"Hyderabad"; 

[email protected]"Andrapradesh"; 

[email protected]"22345"; 

address=city,state,zip; 

NSLog(@"##########%@",address); 

double latitude = 0, longitude = 0; 

NSString *esc_addr = [address stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; 

NSString *req = [NSString stringWithFormat:@"http://maps.google.com/maps/api/geocode/json?sensor=false&address=%@", esc_addr]; 

NSString *result = [NSString stringWithContentsOfURL:[NSURL URLWithString:req] encoding:NSUTF8StringEncoding error:NULL]; 

NSLog(@"333333%@",result); 

if (result) { 
NSScanner *scanner = [NSScanner scannerWithString:result]; 

NSLog(@"##########%@",scanner); 

if ([scanner scanUpToString:@"\"lat\":" intoString:nil] && [scanner scanString:@"\"lat\":" intoString:nil]) { 
[scanner scanDouble:&latitude]; 

NSLog(@"4444444%@",scanner); 

NSLog(@"5555%@",latitude); 

if ([scanner scanUpToString:@"\"lng\":" intoString:nil] && [scanner scanString:@"\"lng\":" intoString:nil]) { 
[scanner scanDouble:&longitude]; 

NSLog(@"6666%@",scanner); 

NSLog(@"7777%@",longitude); 

} 

} 

} 

CLLocationCoordinate2D center; 

center.latitude = latitude; 

NSLog(@"##########%@",latitude); 

center.longitude = longitude; 

return center; 

} 




333333 { 

"results" : [ 

{ 

"address_components" : [ 

{ 

"long_name" : "Hyderabad", 

"short_name" : "Hyderabad", 

"types" : [ "locality", "political" ] 

}, 

{ 

"long_name" : "Ranga Reddy", 

"short_name" : "R.R. District", 

"types" : [ "administrative_area_level_2", "political" ] 

}, 

{ 

"long_name" : "Andhra Pradesh", 

"short_name" : "Andhra Pradesh", 

"types" : [ "administrative_area_level_1", "political" ] 

}, 

{ 

"long_name" : "India", 

"short_name" : "IN", 

"types" : [ "country", "political" ] 

} 

], 

"formatted_address" : "Hyderabad, Andhra Pradesh, India", 

"geometry" : { 

"bounds" : { 

"northeast" : { 

"lat" : 17.57944810, 

"lng" : 78.69135810 

}, 

"southwest" : { 

"lat" : 17.23837080, 

"lng" : 78.24014110 

} 

}, 

"location" : { 

"lat" : 17.3850440, 

"lng" : 78.4866710 

}, 

"location_type" : "APPROXIMATE", 

"viewport" : { 

"northeast" : { 

"lat" : 17.55533690, 

"lng" : 78.74278980 

}, 

"southwest" : { 

"lat" : 17.21459250, 

"lng" : 78.23055219999999 

} 

} 

}, 

"types" : [ "locality", "political" ] 

} 

], 

"status" : "OK" 

}

2012-03-29 23：56：58.577 SVGeocoder [670：11603]
####
2012-03-29 23：56：58.578 SVGeocoder [670：11603 ] ##########（空）

來源

2012-03-30 Raju goud Bingi

這是什麼線應該做的事情：'加RESS =城市，州，郵編;'？這甚至不是有效的目標-c。這是否編譯？ – jrturton 2012-03-30 06:16:10

你到底在問什麼，這是不明確的。你正在列出一個迴應，這是你正在得到什麼？你有什麼問題？ – jrturton 2012-03-30 06:18:03

正在獲得該響應，但我想提取數值（經度和緯度） – 2012-03-30 06:22:55

試試這個：

- (CLLocationCoordinate2D) geoCodeUsingAddress: (NSString *) address 
{ 
    CLLocationCoordinate2D myLocation; 

    NSString *esc_addr = [address stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding]; 

    NSString *req = [NSString stringWithFormat: @"http://maps.google.com/maps/api/geocode/json?sensor=false&address=%@", esc_addr]; 

    NSDictionary *googleResponse = [[NSString stringWithContentsOfURL: [NSURL URLWithString: req] encoding: NSUTF8StringEncoding error: NULL] JSONValue]; 

    NSDictionary *resultsDict = [googleResponse valueForKey: @"results"]; 
    NSDictionary *geometryDict = [resultsDict valueForKey: @"geometry"];  
    NSDictionary *locationDict = [geometryDict valueForKey: @"location"];  
    NSArray *latArray = [locationDict valueForKey: @"lat"]; NSString *latString = [latArray lastObject]; 
    NSArray *lngArray = [locationDict valueForKey: @"lng"]; NSString *lngString = [lngArray lastObject];  

    myLocation.latitude = [latString doubleValue];  
    myLocation.longitude = [lngString doubleValue]; 

    LogInfo(@"lat: %f\tlon:%f", myLocation.latitude, myLocation.longitude); 
    return myLocation; 
}

來源

2012-03-30 06:08:26 Deviator

什麼是JSON值？ – Dejell 2013-10-21 05:54:21

如何實現獲取緯度和經度的代碼？

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