Let draggable UIImage move back to origin position - swift

Question

Edit:
I was able to change the code in a way, that the program does not crash anymore. However, there is just one tiny problem left for the code to work:
As you can see in my console output, the coordinates for origin2 are not the same as in origin 1.
origin1: (268.0, 241.0) origin2: (116.0, 323.0) sender view center:
Optional((146.5, 397.0))
So I need to get the imageOrigin1-values from viewDidLoad() and use them im func handlePan(sender:UIPanGestureRecognizer).
I just don't know how to do this...
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var image: UIImageView!
#IBOutlet weak var correctField: UIImageView!
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewDidLoad() {
super.viewDidLoad()
let imageOrigin1 = image.frame.origin
print("origin1: \(imageOrigin1)")
}
#IBAction func handlePan(sender:UIPanGestureRecognizer) {
let imageOrigin2 = image.frame.origin
let translation = sender.translationInView(self.view)
if let view = sender.view {
view.center = CGPoint(x:view.center.x + translation.x,
y:view.center.y + translation.y)
}
if sender.state == UIGestureRecognizerState.Ended {
if correctField.frame.contains(sender.view!.center){
print("Correct")
sender.setTranslation(CGPointZero, inView: self.view)
} else{
print("origin2: \(imageOrigin2)")
print("sender view center: \(sender.view?.center)")
//sender.view?.center = imageOrigin
}
}
}
}

Answer 1

I solved this problem myself, adding a new class and passing the variables via set and get methods:
CLASS:
import UIKit
class Origin {
var positionOrigin: CGPoint!
func setImageOrigin(Image: UIImageView) {
positionOrigin = Image.center
}
func getImageOrigin() -> CGPoint {
return positionOrigin
}
}
VIEW CONTROLLER:
import UIKit
class ViewController: UIViewController {
#IBOutlet weak var correctField: UIImageView!
#IBOutlet weak var image: UIImageView!
var imageOrigin = Origin()
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
override func viewDidLoad() {
super.viewDidLoad()
imageOrigin.setImageOrigin(image)
}
#IBAction func handlePan(sender:UIPanGestureRecognizer) {
let translation = sender.translationInView(self.view)
if let view = sender.view {
view.center = CGPoint(x:view.center.x + translation.x,
y:view.center.y + translation.y)
sender.setTranslation(CGPointZero, inView: self.view)
}
if sender.state == UIGestureRecognizerState.Ended {
if correctField.frame.contains(sender.view!.center){
print("Correct")
} else{
image.center = imageOrigin.getImageOrigin()
}
}
}
}