I don't want to update admob banner ads in swift - ios

Question

I'm creating voice collection app separated 4 genres(I control genres by using switch statement).You can choose one in four genres in segmentedcontroll and change buttons shown above segmentedcontroll. And I'm creating Buttons by using double for　statement.
When changing genres and updating Button I coded like
loadView()
viewDidLoad()
to update buttons.But that update banner ads(disappear and appear again)
as well.How can I stop updating banner ads?.Sorry for my poor English and messy code.Thank you.
I used addsubView but which didn't work.
//this is a part of whole code
import UIKit
import AVFoundation
import GoogleMobileAds
class ViewController: UIViewController{
var spaceForiPhoneX = 0
var fontOfText = 9
var adView:UIWindow! = UIWindow()
var admobView:GADBannerView!
var window:UIWindow!
// true:テスト
let AdMobTest:Bool = true
var player = AVAudioPlayer()
var buttonArray:[UIButton]!
var currentArray:[String] = []
var first = true
override var prefersStatusBarHidden: Bool{
return true
}
lazy var buttonSegmentedControl: UISegmentedControl = {
let sc = UISegmentedControl(items: ["outou","outou2","bougen","meigen"])
sc.translatesAutoresizingMaskIntoConstraints = false
sc.tintColor = UIColor.white
sc.selectedSegmentIndex = 0
sc.addTarget(self, action: #selector(handleButtonsChange), for: .valueChanged)
return sc
}()
#objc func handlebuttonsChange(){
switch buttonSegmentedControl.selectedSegmentIndex {
case 0:
currentArray = outou
case 1:
currentArray = outou2
case 2:
currentArray = bougen
case 3:
currentArray = meigen
default:
print("not selected")
}
loadView()
viewDidLoad()
}
override func viewDidLoad() {
super.viewDidLoad()
if(first) {
currentArray = reloadViewController.outou
first = false
print("Google Mobile Ads SDK version: \(GADRequest.sdkVersion())")
var admobView = GADBannerView()
admobView = GADBannerView(adSize:kGADAdSizeBanner)
// iPhone X のポートレート決め打ちです
admobView.frame.origin = CGPoint(x:0, y:self.view.frame.size.height - admobView.frame.height + CGFloat(spaceForiPhoneX))
admobView.frame.size = CGSize(width: self.view.frame.width, height:admobView.frame.height)
admobView.adUnitID = TEST_ID
admobView.rootViewController = self
admobView.load(GADRequest())
navigationItem.titleView?.addSubview(admobView)
}
view.backgroundColor = UIColor(r: 61, g: 91, b: 151)
let numberOfrows = 6
let numberOfLines = 3
var count = 0
var buttonArray:[UIButton] = []
let sizeOfButton = view.frame.height / 10
let widthOfSpace = ((view.frame.width - sizeOfButton * 4) / 5 )
forloop : for row in 0 ... numberOfrows {
for line in 0 ... numberOfLines {
let button = UIButton(type: .custom)
button.backgroundColor = UIColor(r: 1, g: 101, b: 161)
button.setTitleColor(UIColor.white, for: .normal)
button.titleLabel?.numberOfLines = 0
button.setTitle(currentArray[row * 4 + line], for: .normal)
button.frame = CGRect(x: (widthOfSpace + sizeOfButton) * CGFloat(line) + widthOfSpace, y: view.frame.height / 9.3 * CGFloat(row) + 50, width: sizeOfButton ,height: sizeOfButton )
button.layer.cornerRadius = 10
button.layer.borderColor = UIColor.white.cgColor
button.layer.borderWidth = 1
button.titleLabel?.font = UIFont.boldSystemFont(ofSize: CGFloat(fontOfText))
button.tag = row * 4 + line
button.addTarget(self, action: #selector(buttonPushed), for:.touchUpInside)
button.showsTouchWhenHighlighted = true
buttonArray.append(button)
count += 1
if (count == currentArray.count) {break forloop}
}
}
for button in buttonArray{
view.addSubview(button)
}
view.addSubview(buttonSegmentedControl)
setupbuttonSegmentedControl()
}
#objc func buttonPushed(button : UIButton){
let audioPath = Bundle.main.path(forResource: currentArray[button.tag], ofType: "mp3")
do {
try player = AVAudioPlayer(contentsOf: URL(fileURLWithPath: audioPath!))
player.play()
}catch{
print(error)
}
}
func setupbuttonSegmentedControl(){
buttonSegmentedControl.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
buttonSegmentedControl.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -90).isActive = true
buttonSegmentedControl.widthAnchor.constraint(equalTo: view.widthAnchor, constant: -24).isActive = true
buttonSegmentedControl.heightAnchor.constraint(equalToConstant: 60).isActive = true
}

Answer 1

You should never call loadView and viewDidLoad by yourself. This is even mentioned in the documentation.
Extract the button update part from viewDidLoad to a separate method and call that method instead.
For example:
Declare an instance variable to store the buttons:
private var buttons: [UIButton] = []
And extract the update code into a method:
private func updateButtons() {
for buttons in buttons {
button.removeFromSuperview()
}
let numberOfrows = 6
let numberOfLines = 3
var count = 0
buttons = []
let sizeOfButton = view.frame.height / 10
let widthOfSpace = ((view.frame.width - sizeOfButton * 4) / 5 )
forloop : for row in 0 ... numberOfrows {
for line in 0 ... numberOfLines {
let button = UIButton(type: .custom)
button.backgroundColor = UIColor(r: 1, g: 101, b: 161)
button.setTitleColor(UIColor.white, for: .normal)
button.titleLabel?.numberOfLines = 0
button.setTitle(currentArray[row * 4 + line], for: .normal)
button.frame = CGRect(x: (widthOfSpace + sizeOfButton) * CGFloat(line) + widthOfSpace, y: view.frame.height / 9.3 * CGFloat(row) + 50, width: sizeOfButton ,height: sizeOfButton )
button.layer.cornerRadius = 10
button.layer.borderColor = UIColor.white.cgColor
button.layer.borderWidth = 1
button.titleLabel?.font = UIFont.boldSystemFont(ofSize: CGFloat(fontOfText))
button.tag = row * 4 + line
button.addTarget(self, action: #selector(buttonPushed), for:.touchUpInside)
button.showsTouchWhenHighlighted = true
buttons.append(button)
count += 1
if (count == currentArray.count) {break forloop}
}
}
for button in buttons {
view.addSubview(button)
}
}
Call this method from both viewDidLoad and from handlebuttonsChange.
By the way, note that the code could be significantly simplified and ideally you should use UICollectionView instead.