UITapGestureRecognizer doesn't work properly - ios

Question

I made the function updateItems() which create, from an array, many UIView's in a UIScrollView :
Here is the file where this function is :
class MainViewController: UIViewController {
#IBOutlet weak var body: UIScrollView!
#IBOutlet weak var edit: UIButton!
var _title: String = "Title"
var _isEditing: Bool = false
var firstItems: [UISectionView] = []
override func viewDidLoad() {
super.viewDidLoad()
navigationController?.navigationBar.prefersLargeTitles = true
navigationController?.navigationBar.topItem?.title = self._title
navigationController?.navigationItem.largeTitleDisplayMode = .automatic
body.contentSize = CGSize(width: UIScreen.main.bounds.width, height: UIScreen.main.bounds.height + 100)
self.updateItems(self.firstItems)
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
public func updateItems(_ s: [UISectionView]) {
let topMargin = 10
let rightMargin = 10
let leftMargin = 10
let space = 5
let heightItem = 60
var b = topMargin
for i in body.subviews {
i.removeFromSuperview()
}
for t in s {
if t.isHidden == true {
continue
}
if t.title != nil {
let f = UIFont(name: "Helvetica", size: 20)
let l = UILabel(frame: CGRect(x: rightMargin, y : b, width: Int(UIScreen.main.bounds.width) - (rightMargin + leftMargin), height: Int(f!.lineHeight)))
l.font = f
l.text = t.title
body.addSubview(l)
b = b + Int(f!.lineHeight) + space
}
for i in t.items{
body.addSubview(i.getView(frame: CGRect(x: rightMargin, y: b, width: Int(UIScreen.main.bounds.width) - (rightMargin + leftMargin), height: heightItem), view: self))
b = b + heightItem + space
}
}
}
}
TIPS : UISectionView is an object which contains an array of UIItemView
The object UIItemView looks like :
class UIItemView {
var icon: UIImage = UIImage();
var line1: rString = rString("")!;
var line2: rString = rString("")!;
var leftline: Any = String();
var background: String = "white"
var onItemTap: (_ sender: UITapGestureRecognizer?) -> () = {sender in }
var onItemLongPress: (_ sender: UILongPressGestureRecognizer?) -> () = {sender in }
var id: String
init?(_ id: String) {
self.id = id
}
public func getView(frame: CGRect, view: UIViewController) -> UIView {
let width = Int(frame.width)
let height = Int(frame.height)
let rightMargin = 20
let leftMargin = 10
let topMargin = 10
let bottomMargin = 10
let iconSide = height - (topMargin + bottomMargin)
let marginLine = leftMargin + iconSide + 10
let v = UIView(frame: frame)
//Background & shape
if self.background == "white" {
v.backgroundColor = UIColor.white;
} else if self.background == "blur" {
let bEV = UIVisualEffectView(effect: UIBlurEffect(style: UIBlurEffectStyle.extraLight))
bEV.frame = v.bounds
bEV.autoresizingMask = [.flexibleWidth, .flexibleHeight]
v.addSubview(bEV)
}
v.layer.cornerRadius = 10.0
//Icon
let i = UIImageView()
i.image = self.icon;
i.frame = CGRect(x: leftMargin, y: topMargin, width: iconSide, height: iconSide)
v.addSubview(i)
//First Line
let l1 = self.line1.getLabel()
l1.frame = CGRect(x: marginLine, y: topMargin, width: width - (marginLine + leftMargin), height: Int(self.line1.getFont().lineHeight))
v.addSubview(l1)
//Seconde Line
let l2 = self.line2.getLabel()
l2.frame = CGRect(x: marginLine, y: height - (bottomMargin + Int(self.line1.getFont().lineHeight)), width: width - (marginLine + leftMargin), height: Int(self.line1.getFont().lineHeight))
v.addSubview(l2)
//Left Line
if type(of: self.leftline) == type(of: SpinnerView()) {
let sv = (self.leftline as! SpinnerView)
sv.frame = CGRect(x: width - (rightMargin + iconSide), y: height/2 - iconSide/2, width: iconSide, height: iconSide)
v.addSubview(sv)
} else if type(of: self.leftline) == type(of: rString("")) {
let rS = (self.leftline as! rString)
if rS.text != "" {
rS.fontName = "HelveticaNeue-Bold"
rS.size = 15
rS.color = UIColor(red:0.01, green:0.48, blue:1.00, alpha:1.0)
let l3 = rS.getLabel()
l3.frame = CGRect(x: width - (rightMargin + Int(rS.getFont().lineWidth(rS.text)) + 15), y: height/2 - (Int(rS.getFont().lineHeight) + 10)/2, width: Int(rS.getFont().lineWidth(rS.text)) + 15, height: Int(rS.getFont().lineHeight) + 10)
l3.backgroundColor = UIColor(red:0.94, green:0.94, blue:0.97, alpha:1.0)
l3.layer.masksToBounds = true
l3.layer.borderWidth = 2
l3.layer.borderColor = UIColor(red:0.94, green:0.94, blue:0.97, alpha:1.0).cgColor
l3.layer.cornerRadius = rS.getFont().lineHeight/1.2
l3.textAlignment = .center
v.addSubview(l3)
}
}
//GestureRecognizer
v.addGestureRecognizer(UITapGestureRecognizer(target: self, action: #selector(self.oIT(_:))))
v.addGestureRecognizer(UILongPressGestureRecognizer(target: self, action: #selector(self.oILP(_:))))
v.restorationIdentifier = self.id
return v;
}
#objc func oIT(_ sender: UITapGestureRecognizer) {
print("Tap")
self.onItemTap(sender)
}
#objc func oILP(_ sender: UILongPressGestureRecognizer) {
print("LongPress")
self.onItemLongPress(sender)
}
static func ==(lhs: UIItemView, rhs: UIItemView) -> Bool {
return lhs === rhs
}
}
TIPS : UIItemView contains the function getView() which returns a specific UIView
The problem :
Everything work properly, when I load the ViewController (where there is the UIScrollView) every UIView's are build like I want, and I can interact with the UIView by the UITapGestureRecognizer or the UILongPressGestureRecognizer (the function is called as expected)
BUT
When I call the function updateItems() a second time, without reload the ViewController, the items change as expected but the UITapGestureRecognizer and the UILongPressGestureRecognizer don't work any more.
I hope you can help me :D
If information are missing for you to understand the problem, please let me know ;)