xcode 当我们知道纬度和经度时，如何以字符串形式获取当前位置名称
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How to get the current Location name as a string , when we know the latitude and longitude
提问by Ravi
Possible Duplicate:
How to retrieve user's current city name?
可能的重复：
如何检索用户当前的城市名称？
using the following methods i am getting latitude and longitude of the current position
使用以下方法我得到当前位置的纬度和经度
- (void)viewDidLoad {
[super viewDidLoad];
locationManager = [[CLLocationManager alloc] init];
locationManager.delegate = self;
locationManager.distanceFilter = kCLDistanceFilterNone; // whenever we move
locationManager.desiredAccuracy = kCLLocationAccuracyHundredMeters; // 100 m
[locationManager startUpdatingLocation];
}
- (void)locationManager:(CLLocationManager *)manager
didUpdateToLocation:(CLLocation *)newLocation
fromLocation:(CLLocation *)oldLocation
{
int degrees = newLocation.coordinate.latitude;
double decimal = fabs(newLocation.coordinate.latitude - degrees);
int minutes = decimal * 60;
double seconds = decimal * 3600 - minutes * 60;
NSString *lat = [NSString stringWithFormat:@"%d° %d' %1.4f\"",
degrees, minutes, seconds];
latLabel.text = lat;
degrees = newLocation.coordinate.longitude;
decimal = fabs(newLocation.coordinate.longitude - degrees);
minutes = decimal * 60;
seconds = decimal * 3600 - minutes * 60;
NSString *longt = [NSString stringWithFormat:@"%d° %d' %1.4f\"",
degrees, minutes, seconds];
longLabel.text = longt;
}
now i need to get the current location name as a string... but not required on a map, how can i do this, give me some suggestion pls,,,thanx in advance
现在我需要将当前位置名称作为字符串获取...但在地图上不需要，我该怎么做，请提前给我一些建议，,,thanx
回答by Krishnabhadra
You are asking about Reverse Geocoding.. Use MKReverseGeocodingfor this purpose.. ThisSO question explains it a bit..
您正在询问反向地理编码..为此目的使用MKReverseGeocoding..这个SO 问题解释了一下..
回答by sElanthiraiyan
- (void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation {
[self.locationManager stopUpdatingLocation];
CLGeocoder * geoCoder = [[CLGeocoder alloc] init];
[geoCoder reverseGeocodeLocation:newLocation completionHandler:^(NSArray *placemarks, NSError *error) {
for (CLPlacemark * placemark in placemarks)
{
NSString *addressTxt = [NSString stringWithFormat:@"%@ %@,%@ %@",
[placemark subThoroughfare],[placemark thoroughfare],
[placemark locality], [placemark administrativeArea]];
NSLog(@"%@",addressTxt);
}
}];
}
回答by Mehul Mistri
Use this common function and just pass latitude and longitude as argument in this function.
使用这个通用函数，并在这个函数中传递纬度和经度作为参数。
-(NSString *)getAddressFromLatLon:(double)pdblLatitude withLongitude:(double)pdblLongitude
{
NSString *urlString = [NSString stringWithFormat:kGeoCodingString,pdblLatitude, pdblLongitude];
NSError* error;
NSString *locationString = [NSString stringWithContentsOfURL:[NSURL URLWithString:urlString] encoding:NSASCIIStringEncoding error:&error];
locationString = [locationString stringByReplacingOccurrencesOfString:@"\"" withString:@""];
return [locationString substringFromIndex:6];
}
and declare this
并声明这个
#define kGeoCodingString @"http://maps.google.com/maps/geo?q=%f,%f&output=csv"
This function will return address of the latitude and longitude you are passing.
此函数将返回您正在传递的纬度和经度的地址。
Hope It helps.
希望能帮助到你。
回答by EXC_BAD_ACCESS
You can use the google API to get the address. Probably you have to send lat and long value as parameter.
您可以使用 google API 来获取地址。可能您必须发送 lat 和 long 值作为参数。
Use google reverse geoCoding
使用谷歌反向地理编码
sample http call here http://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452&sensor=true_or_false
此处的示例 http 调用http://maps.googleapis.com/maps/api/geocode/json?latlng=40.714224,-73.961452&sensor=true_or_false
回答by Shantanu
Maybe this is what you will have to use MKReverseGeocoder
也许这就是您必须使用的MKReverseGeocoder
