Uploading Photos Swift/iOS - objective-c

Question

Sorry for my English I'll do my best.
I have an issue trying to upload photos from the user's library.
First, I get user's photo with this method
func grabPhotos(){
let imgManager = PHImageManager.defaultManager()
let requestOptions = PHImageRequestOptions()
requestOptions.synchronous = false
requestOptions.deliveryMode = .FastFormat
let fetchOptions = PHFetchOptions()
fetchOptions.sortDescriptors = [NSSortDescriptor(key: "creationDate", ascending: false)]
if let fetchResult : PHFetchResult = PHAsset.fetchAssetsWithMediaType(.Image, options: fetchOptions){
if fetchResult.count > 0{
for i in 0..<fetchResult.count{
let asset = fetchResult.objectAtIndex(i) as! PHAsset
if NSComparisonResult.OrderedSame == asset.creationDate!.compare(self.appDelegate.dateLastUpload!){
print("meme date")
}
else if NSComparisonResult.OrderedAscending == asset.creationDate!.compare(self.appDelegate.dateLastUpload!){
}
else {
imgManager.requestImageDataForAsset(asset, options: requestOptions, resultHandler: { (data, string, orientation, objects) in
self.Upload((UIImage(data: data!)?.CGImage)! , nomImage: "\(asset.creationDate)" )
})
}
}
}
else{
print("you got no photos")
}
}
}
as you can see, each time I get a photo I want to upload it to my server.
the upload part works well.
Here is the upload method
func clickUpload(image:CGImage,nomImage : String){
let url = NSURL(string: "http://192.168.1.20:1993/upload")
let image_photo = UIImage(CGImage: image)
let request = NSMutableURLRequest(URL: url!)
request.HTTPMethod = "POST"
let boundary = generateBoundaryString()
//define the multipart request type
request.setValue("multipart/form-data; boundary=\(boundary)", forHTTPHeaderField: "Content-Type")
if var image_data = UIImageJPEGRepresentation(image_photo,0.8){
let body = NSMutableData()
let fname = nomImage
let mimetype = "image/jpg"
//define the data post parameter
body.appendData("--\(boundary)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-Disposition:multipart/form-data; name=\"test\"\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("enctype=\"multipart/form-data".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("hi\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("--\(boundary)\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-Disposition:form-data; name=\"file\"; filename=\"\(fname)\"\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("Content-Type: \(mimetype)\r\n\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData(image_data)
body.appendData("\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
body.appendData("--\(boundary)--\r\n".dataUsingEncoding(NSUTF8StringEncoding)!)
//request.setValue("multipart/form-data", forHTTPHeaderField: "content-Type")
request.HTTPBody = body
let session = NSURLSession.sharedSession()
let task = session.dataTaskWithRequest(request) {
(
let data, let response, let error) in
guard let _:NSData = data, let _:NSURLResponse = response where error == nil else {
print("error")
return
}
let dataString = NSString(data: data!, encoding: NSUTF8StringEncoding)
print(dataString)
}
task.resume()
}
else {
print(« data nil")
}
}
Now problems come... It works well if I upload photos with reduced size, but I want to upload them in HighQualityFormat.
I got 170 photos on my device, and it uploads approximatively 80 photos before crashing with this message
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'NSAllocateMemoryPages(1504802) failed'
Could you guys help me to solve it or give me another way to achieve this?
Thank you all.