Wait until transaction is finished

Programming Languages Swift
Mcrich23 OP
Created May ’21
Replies 15
Boosts 0
Views 2.1k
Participants 3
Hi,
How can I wait until an IAP transaction/restore is finished?

Thanks in advanced.
Replies  15
Boosts  0
Views  2.1k
Participants  3
OOPer OP
May ’21

How can I wait until an IAP transaction/restore is finished?

Hard to say something concrete and sure without seeing the details, but you may need to change your way of thinking.
Not wait until, but do something when.

If you were accustomed to completion handler pattern, it would not be so difficult.
0
Claude31 OP
May ’21
Look for the doc:

https://developer.apple.com/documentation/storekit/in-app_purchase/offering_completing_and_restoring_in-app_purchases

You will find sample code that explains how to properly use this.
0
Mcrich23 OP
May ’21

If you were accustomed to completion handler pattern, it would not be so difficult.

You will find sample code that explains how to properly use this.

I was not able to find the answer in documentation and when I create a completion handler on skpaymentqueue, it gives me errors for it not conforming to protocols.

IAP Manager SKPaymentQueue

0
Claude31 OP
May ’21
It would help to know the exact error and the exact line where the error occurs.
Where do you call purchase() ?

Code Block 
 public func purchase(product: Product, completion: @escaping () -> Void) {
        guard SKPaymentQueue.canMakePayments() else {
            return
        }
        guard let storeKitProduct = products.first(where: { $0.productIdentifier == product.rawValue }) else {
            return
        }
        Utilities.purchaseFailed = Bool()
        let paymentRequest = SKPayment(product: storeKitProduct)
        SKPaymentQueue.default().add(self)
        SKPaymentQueue.default().add(paymentRequest)
        completion()
    }
    public func restore(completion: @escaping () -> Void) {
        SKPaymentQueue.default().restoreCompletedTransactions()
        completion()
    }
    
    func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
        transactions.forEach({ transaction in
            switch transaction.transactionState {
            case .purchasing:
                //No op
                break
            case .purchased:
                handlePurchase(transaction.payment.productIdentifier)
                Utilities.purchaseFailed = false
                SKPaymentQueue.default().finishTransaction(transaction)
                break
            case .failed:
                Utilities.purchaseFailed = true
                Utilities.restoredPurchases = false
                SKPaymentQueue.default().finishTransaction(transaction)
                break
            case .restored:
                print("purchases restored")
                handlePurchase(transaction.payment.productIdentifier)
                Utilities.restoredPurchases = true
                SKPaymentQueue.default().finishTransaction(transaction)
                break
            case .deferred:
                break
            @unknown default:
                break
            }
        })
}
    private func handlePurchase(_ id: String) {
        UserDefaults.standard.setValue(true, forKey: id)
        print("id = \(id)")
        
        if id == "JokesRUs.RemoveAds" {
            Utilities.ShowAds = false
        }
        if id == "JokesRUs.Icons.Summer" {
            print("summer bought")
            IconChange.setIconPurchased = true
            IconChange.summerIconUnlocked = true
            IconChange.numUnlocked = IconChange.numUnlocked + 1
            UserDefaults.standard.setValue(IconChange.numUnlocked + 1, forKey: "numUnlocked")
            UserDefaults.standard.setValue(true, forKey: "summerIconUnlocked")
        }
        if id == "JokesRUs.Icons.Taco" {
            print("taco bought")
            IconChange.setIconPurchased = true
            IconChange.tacoIconUnlocked = true
            IconChange.numUnlocked = IconChange.numUnlocked + 1
            UserDefaults.standard.setValue(IconChange.numUnlocked + 1, forKey: "numUnlocked")
            UserDefaults.standard.setValue(true, forKey: "tacoIconUnlocked")
        }
        if id == "JokesRUs.Icons.Pizza" {
            print("pizza bought")
            IconChange.setIconPurchased = true
            IconChange.pizzaIconUnlocked = true
            IconChange.numUnlocked = IconChange.numUnlocked + 1
            UserDefaults.standard.setValue(IconChange.numUnlocked + 1, forKey: "numUnlocked")
            UserDefaults.standard.setValue(true, forKey: "pizzaIconUnlocked")
        }
        if id == "JokesRUs.Icons.HotDog" {
            print("hotdog bought")
            IconChange.setIconPurchased = true
            IconChange.hotdogIconUnlocked = true
            IconChange.numUnlocked = IconChange.numUnlocked + 1
            UserDefaults.standard.setValue(IconChange.numUnlocked + 1, forKey: "numUnlocked")
            UserDefaults.standard.setValue(true, forKey: "hotdogIconUnlocked")
        }
        if id == "JokesRUs.Icons.Hamburger" {
            print("hamburger bought")
            IconChange.setIconPurchased = true
            IconChange.hamburgerIconUnlocked = true
            IconChange.numUnlocked = IconChange.numUnlocked + 1
            UserDefaults.standard.setValue(IconChange.numUnlocked + 1, forKey: "numUnlocked")
            UserDefaults.standard.setValue(true, forKey: "hamburgerIconUnlocked")
        }
        if id == "JokesRUs.Icons.Doughnut" {
            print("doughnut bought")
            IconChange.setIconPurchased = true
            IconChange.doughnutIconUnlocked = true
            IconChange.numUnlocked = IconChange.numUnlocked + 1
            UserDefaults.standard.setValue(IconChange.numUnlocked + 1, forKey: "numUnlocked")
            UserDefaults.standard.setValue(true, forKey: "doughnutIconUnlocked")
        }
    }


0
Mcrich23 OP
May ’21
The thing is, there is no error, it just calls completion() too early.
0
OOPer OP
May ’21

The thing is, there is no error, it just calls completion() too early.

Because you write completion() where it is called too early.
0
Mcrich23 OP
May ’21
So then, how do I write completion in the correct place?
0
OOPer OP
May ’21

So then, how do I write completion in the correct place?

Seems I need to repeat, you need to clarify where is the correct place
0
Mcrich23 OP
May ’21
After the transaction has taken place. I want to trigger the transaction, and then run an if sentence after that. However, it runs before. Therefore, I need to figure out how to do call completion after the transaction.
0
OOPer OP
May ’21

After the transaction has taken place.

So, where is the place where the transaction has taken place?
0
Mcrich23 OP
May ’21
IDK? That is what I am trying trying to figure out. Once I figure that out. It is much easier.

IAP Manager.Swift


0
OOPer OP
May ’21
Seems you are writing code before you understand the behavior of the framework you are using...
0
Mcrich23 OP
May ’21
Somewhat, I followed some YouTube tutorials. I understand that the purchasing state is while it is being purchased, and I understand failed, purchased, and restored. I just don't know where this fits into it.
0
OOPer OP
May ’21
Many things omitted in YouTube tutorials. Better learn official documentations alongside with video tutorials.

In-App Purchase

Please read all the articles and when finished reading, please tell us which part of which document you do not understand.
0
Mcrich23 OP
May ’21
Accepted Answer
I got what I wanted to do by posting to the Notification center when I am done with it.
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