Save UIImage with long press - ios

Question

I have a iOS Swift Project for share and save image. I try to add a long press interaction to save the image. I created the function of interaction, but I do not know how to save the image in Swift.
My code
override func viewDidLoad() {
super.viewDidLoad()
let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: "longPressed:")
self.view.addGestureRecognizer(longPressRecognizer)
}
func longPressed(sender: UILongPressGestureRecognizer) {
println("longpressed")
}
I would like to know how to add image in the library pictures. Thank you in advance for your response.

Answer 1

Use this code
import UIKit
class ViewController: UIViewController {
#IBOutlet var imageview: UIImageView!
override func viewDidLoad() {
super.viewDidLoad()
imageview.userInteractionEnabled = true
let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: "longPressed:")
longPressRecognizer.minimumPressDuration = 0.5
imageview.addGestureRecognizer(longPressRecognizer)
// Do any additional setup after loading the view, typically from a nib.
}
func longPressed(sender: UILongPressGestureRecognizer) {
UIImageWriteToSavedPhotosAlbum(imageview.image, self, "image:didFinishSavingWithError:contextInfo:", nil)
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
func image(image: UIImage!, didFinishSavingWithError error: NSError!, contextInfo: AnyObject!) {
if (error != nil) {
// Something wrong happened.
} else {
// Everything is alright.
}
}
}

Answer 2

try this, you should edit your question for saving image displayed in UICollectionViewCell
class ViewController: UIViewController {
#IBOutlet weak var collectionView: UICollectionView!
override func viewDidLoad() {
super.viewDidLoad()
let longPressRecognizer = UILongPressGestureRecognizer(target: self, action: "longPressed:")
collectionView.addGestureRecognizer(longPressRecognizer)
}
func longPressed(sender: UILongPressGestureRecognizer) {
if (sender.state != .Ended) {
return
}
let point = sender.locationInView(self.collectionView)
let indexPath = self.collectionView.indexPathForItemAtPoint(point)
if (indexPath == nil) {
print("long press on collection view but not on a item")
} else {
let cell = self.collectionView.cellForItemAtIndexPath(indexPath!)
// save image to album
UIImageWriteToSavedPhotosAlbum(cell.imageView.image!, self, "image:didFinishSavingWithError:contextInfo:", nil)
}
}
func image(image: UIImage!, didFinishSavingWithError error: NSError!, contextInfo: AnyObject!) {
if (error != nil) {
// Something wrong happened.
print(error.localizedDescription)
} else {
// Everything is alright.
}
}
}