Find Direction in iphone like North or etc

Question

I have one trouble in my app i want to know the direction to the Latitude and Longtitude from the current Lat & Long

-(void)showDirection
{
 CGFloat latitude = Lat;
 if (latitude < 0) {
    latitude = -latitude;
    strDirection = @"S";
 } else {
    strDirection = @"N";
 }
 // Longitude
 CGFloat longitude = Long;
 if (longitude < 0) {
    longitude = -longitude;
    strDirection = @"W";
 } else {
    strDirection = @"E";
 }
 NSLog(@"direc %@",strDirection);
}

Answer 1

try this code below:

first add framework in your project CoreLocation.Framework after adding initialize CLLocationManager object and import CLLocationManager header file.

Yourviewcontroller.h

#import <CoreLocation/CoreLocation.h>
@interface Yourviewcontroller :UIViewController <CLLocationManagerDelegate>
{
      CLLocationManager *locationManager;
} 

Yourviewcontroller.m

locationManager=[[CLLocationManager alloc] init];
locationManager.desiredAccuracy = kCLLocationAccuracyBest;
locationManager.delegate = self;
//Start the compass updates.
[locationManager startUpdatingHeading];

add function for get current direction

-(void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading
{
    float mHeading = newHeading.magneticHeading;
    if ((mHeading >= 339) || (mHeading <= 22)) {
        //[direction setText:@"N"]; 

    }else if ((mHeading > 23) && (mHeading <= 68)) {
        //[direction setText:@"NE"];    

    }else if ((mHeading > 69) && (mHeading <= 113)) {
        //[direction setText:@"E"]; 

    }else if ((mHeading > 114) && (mHeading <= 158)) {
        //[direction setText:@"SE"];

    }else if ((mHeading > 159) && (mHeading <= 203)) {
        //[direction setText:@"S"]; 

    }else if ((mHeading > 204) && (mHeading <= 248)) {
        //[direction setText:@"SW"];    

    }else if ((mHeading > 249) && (mHeading <= 293)) {
       // [direction setText:@"W"];

    }else if ((mHeading > 294) && (mHeading <= 338)) {
       // [direction setText:@"NW"];

     }
}

Note :compass is work only real iphone device,not work in iphone simulator..!