How to write Exif data to image in Swift with lat long

Please check this below answer.you got error due to nil value on EXIFDictionary and GPSDictionary

 var image = info[UIImagePickerControllerOriginalImage] as! UIImage let jpeg = UIImageJPEGRepresentation(image, 1.0) var source: CGImageSource? = nil source = CGImageSourceCreateWithData((jpeg as CFData?)!, nil) let metadata = CGImageSourceCopyPropertiesAtIndex(source!, 0, nil) as? [AnyHashable: Any] var metadataAsMutable = metadata var EXIFDictionary = (metadataAsMutable?[(kCGImagePropertyExifDictionary as String)]) as? [AnyHashable: Any] var GPSDictionary = (metadataAsMutable?[(kCGImagePropertyGPSDictionary as String)]) as? [AnyHashable: Any] if !(EXIFDictionary != nil) {       EXIFDictionary = [AnyHashable: Any]()    }  if !(GPSDictionary != nil) {       GPSDictionary = [AnyHashable: Any]()   }   GPSDictionary![(kCGImagePropertyGPSLatitude as String)] = 30.21313   GPSDictionary![(kCGImagePropertyGPSLongitude as String)] = 76.22346   EXIFDictionary![(kCGImagePropertyExifUserComment as String)] = "Hello Image"   let UTI: CFString = CGImageSourceGetType(source!)!   let dest_data = NSMutableData()   let destination: CGImageDestination = CGImageDestinationCreateWithData(dest_data as CFMutableData, UTI, 1, nil)!   CGImageDestinationAddImageFromSource(destination, source!, 0, (metadataAsMutable as CFDictionary?))            CGImageDestinationFinalize(destination)

This could be from your destination definition.

This worked for me

(...)    let source                  =   CGImageSourceCreateWithData(jpgData as CFData, nil)    let finalData               =   NSMutableData()    let destination             =   getDestination(finalData:finalData, source:source!)(...)// Note that :// NSMutableData type variable will be cast to CFMutableData// fileprivate func getDestination(finalData:CFMutableData, source:CGImageSource)->CGImageDestination?{    guard let destination = CGImageDestinationCreateWithData(finalData,                                                             CGImageSourceGetType(source)!,                                                             1,                                                             nil)else{return nil}    return destination}