Question

My app currently uses the camera with a custom overlay to take and save a picture.

Ideally, I would like to collect the following 3 paramaters at the time of photo capture as well:

1. Precise GPS Location
2. Compass direction
3. Phone tilt

I’m mainly focused on getting items 1 & 2. Any ideas on how I could do this?

Answer 1

few variables you should declare on .h file of your viewController

float locLat;   //for latitude
float locLon;   //for longitude
float direction;  // for angle in radian
CLLocationManager *Manager; 

in .m file at viewdidload method

Manager = [[CLLocationManager alloc] init];
Manager.delegate = self; 
Manager.desiredAccuracy = kCLLocationAccuracyBest; 
Manager.distanceFilter = 1.0; 
[Manager startUpdatingLocation];
[Manager startUpdatingHeading];

These delegate method wil be called for where you get location updates

-(void)locationManager:(CLLocationManager *)manager didUpdateToLocation:(CLLocation *)newLocation fromLocation:(CLLocation *)oldLocation 
{
    userlat = newLocation.coordinate.latitude;
    userlon = newLocation.coordinate.longitude;
}

This will give you compass values updates

- (void)locationManager:(CLLocationManager *)manager didUpdateHeading:(CLHeading *)newHeading 
{
    float direction = newHeading.trueHeading;    
}

You can use these three values at the imagepicker’s didFinishPickingMediaWithInfo delegate method.