Handle Image Metadata Swift 2.0 - ios

Question

I have a code to save a picture in Swift (1.1) and since IOS 9 i try to change it for swift 2.0 but after 3 days i can not ...
So it's a juste a simple function get metadata and function get this, update this and create new image with this. Works fine with xCode 6.2 and Swift (1.1)
So if you can help me please :s
import ImageIO
func savePicture(data: NSData) {
var img: CGImageRef
if let source = CGImageSourceCreateWithData(data, nil) {
var metadata = CGImageSourceCopyPropertiesAtIndex(source, 0, nil)! as Dictionary
let width = CGFloat(metadata[kCGImagePropertyPixelWidth] as NSNumber)
let height = CGFloat(metadata[kCGImagePropertyPixelHeight] as NSNumber)
let reso = width * height
metadata[kCGImageDestinationLossyCompressionQuality as String] = self.jpegQuality
var tiff:NSMutableDictionary = metadata[kCGImagePropertyTIFFDictionary] as NSMutableDictionary
tiff.setValue("Pictures", forKey: kCGImagePropertyTIFFModel)
var exif:NSMutableDictionary = metadata[kCGImagePropertyExifDictionary] as NSMutableDictionary
exif.setValue("Pictures", forKey: kCGImagePropertyExifLensModel)
let gps:NSMutableDictionary = NSMutableDictionary()
metadata[kCGImagePropertyGPSDictionary] = gps
gps.setValue(self.loc["lat"], forKey: kCGImagePropertyGPSLatitude)
gps.setValue(self.loc["lng"], forKey: kCGImagePropertyGPSLongitude)
self.dateFormatter.dateFormat = "HH:mm:ss"
gps.setValue(self.dateFormatter.stringFromDate(NSDate()), forKey: kCGImagePropertyGPSTimeStamp)
self.dateFormatter.dateFormat = "yyyy:MM:dd"
gps.setValue(self.dateFormatter.stringFromDate(NSDate()), forKey: kCGImagePropertyGPSDateStamp)
if (reso > self.desiredRes) {
let ratio = reso / self.desiredRes
metadata[kCGImageSourceThumbnailMaxPixelSize as String] = max(width, height) / sqrt(ratio)
metadata[kCGImageSourceCreateThumbnailFromImageIfAbsent as String] = true
img = CGImageSourceCreateThumbnailAtIndex(source, 0, metadata)
} else {
img = CGImageSourceCreateImageAtIndex(source, 0, metadata)
}
let uti = "public.jpeg"
var d = NSMutableData()
var dest: CGImageDestinationRef = CGImageDestinationCreateWithData(d, uti, 1, nil)
CGImageDestinationAddImage(dest, img, metadata)
CGImageDestinationFinalize(dest)
d.writeToFile(self._makePicName(), atomically: false)
}
// debug purpose: show that metadata have been saved
// let d = NSData(contentsOfFile: self.paths.last!)
// if let t = CGImageSourceCreateWithData(d, nil) {
// let again = CGImageSourceCopyPropertiesAtIndex(t, 0, nil) as Dictionary
// println(again)
// }
dispatch_async(dispatch_get_main_queue(), {
for dlg in self.delegate {
dlg.didFinishSavingPhoto?()
}
})
}