copy object from a subview then place object - arrays

Question

I want my swift code to copy the object which is a brown view. So the user hits the copy button then the user hits the object they want to copy and then they point to the area where they want to place the object. Basically the gif below is exactly what I am look at I don't know if you would do something like a clone of something like this.
import UIKit;import CoreData
class ViewController: UIViewController {
var addBoxes = [UIImageView]()
let subview = UIImageView()
var currentView: UIView?
var box = UIButton()
var copyButton = UIButton()
override func viewDidLoad() {
super.viewDidLoad()
[box,copyButton].forEach {
$0.translatesAutoresizingMaskIntoConstraints = false
view.addSubview($0)
}
box.backgroundColor = .red
box.setTitle("Add", for: .normal)
copyButton.setTitle("Copy", for: .normal)
NSLayoutConstraint.activate([
box.leadingAnchor.constraint(equalTo: copyButton.trailingAnchor),
box.bottomAnchor.constraint(equalTo: view.bottomAnchor),
box.heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: 0.04),
box.widthAnchor.constraint(equalTo:view.widthAnchor ,multiplier: 0.5),
copyButton.leadingAnchor.constraint(equalTo: view.leadingAnchor),
copyButton.bottomAnchor.constraint(equalTo: view.bottomAnchor),
copyButton.heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: 0.04),
copyButton.widthAnchor.constraint(equalTo:view.widthAnchor ,multiplier: 0.5),
])
copy.addTarget(self, action: #selector(copyBox), for: .touchDown)
box.addTarget(self, action: #selector(addQuarter), for: .touchDown)
copyButton.backgroundColor = .blue
}
override var prefersStatusBarHidden: Bool {
return true
}
#objc func copyBox() {
}
#objc func handlePanGestured(_ gesture: UIPanGestureRecognizer) {
currentView = gesture.view
let draggedView = gesture.view!
view.bringSubviewToFront(draggedView)
let translation = gesture.translation(in: view)
draggedView.center = CGPoint(x: draggedView.center.x + translation.x, y: draggedView.center.y + translation.y)
gesture.setTranslation(.zero, in: view)
}
#objc func addQuarter(){
let subview = UIImageView()
subview.isUserInteractionEnabled = true
addBoxes.append(subview)
view.addSubview(subview)
let pan = UIPanGestureRecognizer(target: self, action: #selector(handlePanGestured(_:)))
subview.addGestureRecognizer(pan)
subview.frame = CGRect(x: view.bounds.midX , y: view.bounds.midY + CGFloat(100), width: CGFloat(100), height: 100)
subview.backgroundColor = .brown
addBoxes.append(subview)
}
}

Answer 1

Achieve your requirement with code
class ViewController: UIViewController {
var addBoxes = [UIImageView]()
let subview = UIImageView()
var currentView: UIView?
var location: CGPoint = CGPoint.zero
var box = UIButton()
var copyButton = UIButton()
override func viewDidLoad() {
super.viewDidLoad()
[box,copyButton].forEach {
$0.translatesAutoresizingMaskIntoConstraints = false
view.addSubview($0)
}
box.backgroundColor = .red
box.setTitle("Add", for: .normal)
copyButton.setTitle("Copy", for: .normal)
NSLayoutConstraint.activate([
box.leadingAnchor.constraint(equalTo: copyButton.trailingAnchor),
box.bottomAnchor.constraint(equalTo: view.bottomAnchor),
box.heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: 0.04),
box.widthAnchor.constraint(equalTo:view.widthAnchor ,multiplier: 0.5),
copyButton.leadingAnchor.constraint(equalTo: view.leadingAnchor),
copyButton.bottomAnchor.constraint(equalTo: view.bottomAnchor),
copyButton.heightAnchor.constraint(equalTo: view.heightAnchor, multiplier: 0.04),
copyButton.widthAnchor.constraint(equalTo:view.widthAnchor ,multiplier: 0.5),
])
copyButton.addTarget(self, action: #selector(copyBox), for: .touchDown)
box.addTarget(self, action: #selector(addQuarter), for: .touchDown)
copyButton.backgroundColor = .blue
self.view.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(handleTapGestured(_:))))
}
override var prefersStatusBarHidden: Bool {
return true
}
#objc func copyBox() {
if let copyObject = currentView?.copyView as? UIImageView{
copyObject.center = location
copyObject.addGestureRecognizer(UIPanGestureRecognizer(target: self, action: #selector(handlePanGestured(_:))))
view.addSubview(copyObject)
}
}
#objc func handlePanGestured(_ gesture: UIPanGestureRecognizer) {
currentView = gesture.view
let draggedView = gesture.view!
view.bringSubviewToFront(draggedView)
let translation = gesture.translation(in: view)
draggedView.center = CGPoint(x: draggedView.center.x + translation.x, y: draggedView.center.y + translation.y)
gesture.setTranslation(.zero, in: view)
}
#objc func handleTapGestured(_ gesture: UITapGestureRecognizer) {
if self.view == gesture.view{
let loc = gesture.location(in: self.view)
location = loc
}
}
#objc func addQuarter(){
let subview = UIImageView()
subview.isUserInteractionEnabled = true
addBoxes.append(subview)
view.addSubview(subview)
let pan = UIPanGestureRecognizer(target: self, action: #selector(handlePanGestured(_:)))
subview.addGestureRecognizer(pan)
subview.frame = CGRect(x: view.bounds.midX , y: view.bounds.midY + CGFloat(100), width: CGFloat(100), height: 100)
subview.backgroundColor = .brown
addBoxes.append(subview)
}
}
extension UIView{
var copyView : UIView?{
if let archiv = try? NSKeyedArchiver.archivedData(withRootObject: self, requiringSecureCoding: false){
if let view = try? NSKeyedUnarchiver.unarchiveTopLevelObjectWithData(archiv) as? UIView{
return view
}
}
return nil
}
}

Answer 2

a way to achieve copy.
You can do it in the Model level.
In your case, to copy View, is to get the View property ( Frame Size, Color ),
then create a new one.
here is the code instruction
model part
// you can add info , in your needs
struct ViewModel{
let color: UIColor
let size: CGSize
}
Logic Part:
add an UITapGestureRecognizer to the base view (add part view)
in copy mode, the view isUserInteractionEnabled false,
in add mode, the view isUserInteractionEnabled true,
var selectModel: ViewModel?
#objc func copyBox() {
// now in the copy mode
}
func selectView(){
// get current model
selectModel = ViewModel(color: yourView.backgroundColor, size: yourView.frame.size)
}
#objc func AddBox() {
// now in the add mode / paste mode
}
func touchToAdd(_ gesture: UITapGestureRecognizer){
// get the tap location,
// the location point is the new view's center
// use the model from `func selectView(){`
// now you got center . frame size 、color， enough to create a new one ( a copy)
}