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This method should not be called on the main thread as it may lead to UI unresponsiveness

App Development
#1

This the error that I have been getting.

“This method should not be called on the main thread as it may lead to UI unresponsiveness.”

The method called in the main thread –

func setupRevenueCat() {
Purchases.logLevel = .debug
Purchases.configure(withAPIKey: Constants.publicKey)
}

This was how I was calling the function

init(){
setupRevenueCat()
GADMobileAds.sharedInstance().start(completionHandler: nil)
FirebaseApp.configure()

        }

I wonder if any one can help me. Perhaps, I need to call the method in App Delegate. I was reading documentation from Revenue cat.

Louis Lee

#2

Can you provide more code that illustrates the context in which you are performing the init()? Is it in a class or a struct?

When you post your code, after you have pasted it into your reply you can format the code nicely, by placing 3 back-ticks ``` on the line above your code and 3 back-ticks ``` on the line below your code. Like this:

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The 3 back-ticks must be the ONLY characters on the line. The back-tick character is located on the same keyboard key as the tilde character ~ (which is located below the Esc key - QWERTY keyboard).

Alternatively after you paste in your code, select that code block and click the </> button on the toolbar. This does the same thing as manually typing the 3 back ticks on the line above and below your code.

This also makes it easier for anyone assisting as they can copy the code and carry out some testing.

#3 
import SwiftUI
import Firebase
import GoogleMobileAds
import AppTrackingTransparency
import AdSupport
import RevenueCat


class AdsManager: NSObject, ObservableObject {

    final class interstitial:NSObject, GADFullScreenContentDelegate,ObservableObject{
        private var interstitial: GADInterstitialAd?
        override init() {
            super.init()
            requestInterstitialAds()
        }
        func requestInterstitialAds() {
            let request = GADRequest()
            request.scene = UIApplication.shared.connectedScenes.first as! UIWindowScene?
            ATTrackingManager.requestTrackingAuthorization (completionHandler: { status in
                GADInterstitialAd.load(withAdUnitID: Constants.adUnitInterstitialInstalled, request: request, completionHandler: { [self] ad, error in
                    if let error = error {
                        print("Failed to load ad with error: \(error)")
                        return
                    }
                    self.interstitial = ad
                    self.interstitial?.fullScreenContentDelegate = self
                })
            })
        }
        func showAd() {

            let root = UIApplication.shared.windows.first?.rootViewController
            if let fullScreenAds = interstitial {
                fullScreenAds.present(fromRootViewController: root!)
            } else {
                print("not ready")
            }
        }

    }
    }


class AdsViewModel: ObservableObject {
    static let shared = AdsViewModel()
    @Published var interstitial = AdsManager.interstitial()
    @Published var showInterstitial = false {
        didSet {
            if showInterstitial {
                interstitial.showAd()
                showInterstitial = false
  
            }
            else {
                    self.interstitial.requestInterstitialAds()
            }
        }
    }
}

@main
struct FetalGrowthPercentile: App {
    
    let adsVM = AdsViewModel.shared
    init(){
        setupRevenueCat()
        GADMobileAds.sharedInstance().start(completionHandler: nil)
        FirebaseApp.configure()
        
            }
 
    var body: some Scene {
        
        WindowGroup  {
        
            SwitchBoard()
                .environmentObject(adsVM)
                .environmentObject(fetusInfoModel())
                .onAppear(perform: UIApplication.shared.addTapGestureRecognizer)
   
        }
    }
    func setupRevenueCat() {
            Purchases.logLevel = .debug
            Purchases.configure(
                with: Configuration.Builder(withAPIKey: Constants.publicKey)
                    .with(appUserID: Constants.revenueCatAppUserId)
                      .build()
             )
    }
}

Previously, the code was working with no problem for one year. With the new xcode update, the problem began. I had blank out two lines and the problem disappeared –
setupRevenueCat()
FirebaseApp.configure()

I read RevenueCat Documentation. I tried using AppDelegate and have a function using didfinishrunningwithoptions. I would run into problem with unstable UI. I try updating cocoa pods but problem was still present.

Louis

#4

I was trying to set up a project using your code but it quickly became apparent that there are too many Constants to resolve.

Maybe someone else can help.