Saving Geotag info with photo on iOS4.1

Question

I am having major issues trying to save a photo to camera roll with geotag info on iOS4.1. I am using following ALAssetsLibrary API:

- (void)writeImageDataTo         


        

Answer 1

Anomie's response in Swift 4.0:

func getGPSDictionaryForLocation(location:CLLocation) -> [String:AnyObject] {

    var gps = [String:AnyObject]()

    var latitude = location.coordinate.latitude

    if(latitude < 0){
        latitude = -latitude
        gps[kCGImagePropertyGPSLatitudeRef as String] = "S" as AnyObject

    }else{
        gps[kCGImagePropertyGPSLatitudeRef as String] = "N" as AnyObject
    }

    gps[kCGImagePropertyGPSLatitude as String] = latitude as AnyObject


    var longitude = location.coordinate.longitude

    if(longitude < 0){
        longitude = -longitude
        gps[kCGImagePropertyGPSLongitudeRef as String] = "W" as AnyObject
    }else{
        gps[kCGImagePropertyGPSLongitudeRef as String] = "E" as AnyObject
    }

    gps[kCGImagePropertyGPSLongitude as String] = longitude as AnyObject

    gps[kCGImagePropertyGPSAltitude as String] = location.altitude as AnyObject

    return gps
}