Portrait/Landscape display ios swift 3 - ios

Question

I have an application with 2 views.
On the first view, the user enter a login, hits on search button.
The application retrieves through an api information about the login,
is redirected on the second view where it displays information about the login.There is a back button on the second view to go back on the first view to be able to search a different login
In the second view, I treat both cases (Landscape/Portrait)
What happens is the following : first time I enter the login, Portrait and landscape cases are well treated on the result view.
When I go back and search a new login, It will only display the mode in which you entered the second time (if you entered in portrait mode, it will
only display in portrait mode, the same with landscape) Is there something that I should be doing ?
here is the code for the first view :
var login = ""
class FirstViewController: UIViewController {
#IBOutlet weak var Input: UITextField!
#IBAction func sendlogin(_ sender: UIButton) {
if let text = Input.text, !text.isEmpty {
login = text
performSegue(withIdentifier: "callaffiche", sender: self)
return
} else {
return
}
}
here is the code for the second view (I will only post viewDidLoad, the back button creation along its function and the creation of the imageuser as there are many objects. But all of them are created with the same principle ) AfficheElemts calls the creation of every single object( ButtonBackAffiche, ImageAffiche are called within AfficheElements
override func viewDidLoad() {
super.viewDidLoad()
print("ds viewdidload")
let qos = DispatchQoS.userInitiated.qosClass
let queue = DispatchQueue.global(qos: qos)
queue.sync {
self.aut.GetToken(completionHandler: { (hasSucceed) in
if hasSucceed {
print("good")
DispatchQueue.main.async {
self.AfficheElements()
}
} else {
print("bad")
}
})
}
}
func ButtonBackAffiche () {
let button = UIButton()
button.restorationIdentifier = "ReturnToSearch"
button.setTitle("Back", for: .normal)
button.setTitleColor(UIColor.black, for: .normal)
button.isEnabled = true
button.addTarget(self, action: #selector(ReturnToSearch(button:)), for: .touchUpInside)
if UIDevice.current.orientation.isPortrait {
button.frame = CGRect (x:CGFloat(180),y:CGFloat(600),width:50,height:30)
} else {
button.frame = CGRect (x:CGFloat(350),y:CGFloat(360),width:50,height:30)
}
self.view.addSubview(button)
}
func ImageAffiche () {
//Get image (Data) from URL Internet
let strurl = NSURL(string: image_url)!
let dtinternet = NSData(contentsOf:strurl as URL)!
let bongtuyet:UIImageView = UIImageView ()
if UIDevice.current.orientation.isPortrait {
print("portrait ds imageview")
bongtuyet.frame = CGRect (x:10,y:80,width:30,height:30)
} else {
print("landscape ds imageview")
bongtuyet.frame = CGRect (x:CGFloat(200),y:CGFloat(80),width:90,height:120)
}
bongtuyet.image = UIImage(data:dtinternet as Data)
self.view.addSubview(bongtuyet)
}
func ReturnToSearch(button: UIButton) {
performSegue(withIdentifier: "ReturnToSearch", sender: self)
}
override func viewWillTransition(to size: CGSize, with coordinator: UIViewControllerTransitionCoordinator) {
print("ds viewwilltransition")
if UIDevice.current.orientation.isPortrait {
print("portrait")
} else {
print("landscape")
}
while let subview = self.view.subviews.last {
subview.removeFromSuperview()
}
AfficheElements()
}
One last thing, I have put traces in the code and the creation of the objects, it goes through the right portion of the code but does not display the objects at the right locations.

Answer 1

Thanks #Spads for taking time to help me.
I finally figured it out. I was not calling the function AfficheElements
int the main queue.
DispatchQueue.main.async {
self.AfficheElements()
}
in viewWillTransition solved it.