UIImage not saving to Camera Roll - ios

Question

I'm currently writing a photo app for iOS in Swift. I'm using the CoreImage Framework to generate a pixel effect on a UIImageView selected by the user. However, I'm having trouble saving the "pixeled" image to the iPhone's Camera Roll. Normally I use
UIImageWriteToSavedPhotosAlbum(pixeledImage,nil,nil,nil)
but it's not saving the UIImage. I have given the app full access to the photo library on the device. It will be helpful if someone could help me figure this out. My image picker:
class ViewController: UIViewController,UIImagePickerControllerDelegate,UINavigationControllerDelegate {
var imagetobepassed: UIImage!
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
#IBAction func Cameratapped(sender: AnyObject) {
var camera = UIImagePickerController()
dispatch_async(dispatch_get_main_queue()) {
camera.delegate = self
camera.sourceType = UIImagePickerControllerSourceType.Camera
camera.allowsEditing = false
self.presentViewController(camera, animated: true, completion: nil)
}
}
#IBAction func photolib(sender: AnyObject) {
var photo = UIImagePickerController()
dispatch_async(dispatch_get_main_queue()) {
photo.delegate = self
photo.sourceType = UIImagePickerControllerSourceType.PhotoLibrary
photo.allowsEditing = false
self.presentViewController(photo, animated: true, completion: nil)
}
}
func imagePickerController(picker: UIImagePickerController, didFinishPickingImage image: UIImage!, editingInfo: [NSObject : AnyObject]!) {
imagetobepassed = image
self.dismissViewControllerAnimated(true, completion: nil)
}
#IBAction func editorPressed(sender: AnyObject) {
}
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "image" {
var editorview = segue.destinationViewController as! EditorViewController
editorview.imagerecived = imagetobepassed
}
}
}
And my editor:
import UIKit
class EditorViewController: UIViewController {
var imagerecived:UIImage!
var pixeledImage:UIImage!
var savedImage:UIImage!
#IBOutlet var imageview: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
pixel()
}
// this function will prduce the pixel effect
func pixel() {
var regularImage = CIImage(image: imagerecived)
var filter = CIFilter(name: "CIPixellate")
filter.setDefaults()
filter.setValue(regularImage, forKey: kCIInputImageKey)
var output = filter.outputImage
pixeledImage = UIImage(CIImage: output)
imageview.image = pixeledImage
}
#IBAction func SaveTapped(sender: AnyObject) {
println(pixeledImage)
UIImageWriteToSavedPhotosAlbum(pixeledImage,nil,nil,nil) // not saving image
}
How can I make this work? I do see this error:
2015-05-16 23:40:05.416 Pixelate2[21579:3341726] Connection to assetsd
was interrupted or assetsd died

Answer 1

First use this line to save image:-
UIImageWriteToSavedPhotosAlbum(pixeledImage, self, "image:didFinishSavingWithError:contextInfo:", nil)
Now implement this method,to catch the error you are getting:-
func image(image: UIImage, didFinishSavingWithError error: NSError?, contextInfo:UnsafePointer<Void>) {
if error == nil {
}
else
{
//log the error out here ,if any
}
}
There is another work around, if you are getting memory warning !
ALAssetsLibrary* lib = [[ALAssetsLibrary alloc] init];
[lib writeImageDataToSavedPhotosAlbum:imageData metadata:nil
completionBlock:^(NSURL *assetURL, NSError *error)
{
// do whatever in the completion handler
}];

Answer 2

I was able to solve the issue using this code:
#IBAction func SaveTapped(sender: AnyObject) {
let softwareContext = CIContext(options: [kCIContextUseSoftwareRenderer:true])
let cgimg = softwareContext.createCGImage(savedImage,
fromRect: savedImage.extent())
let libary = ALAssetsLibrary()
libary.writeImageToSavedPhotosAlbum(cgimg, metadata: savedImage.properties(),
completionBlock: nil)
}