ios - 无法完成购买非续订订阅交易

Question

我想在我的应用中实现年度订阅，我使用 StoreKit 来实现。问题是，当我点击 subscriptionButton 时。应用抛出错误:'NSInvalidArgumentException'，原因:'无法完成购买交易'。我被困在这个地方，无法解决我的问题。因此，我的 paymentQueue 代码如下所示:

func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
    print(transactions)
    for transaction in transactions {
        print(transaction.error ?? "")
        switch transaction.transactionState {
        case .deferred:
            print("deffered")

        case let .failed(err):
            print("failed: \(err)")
        case .purchased:
            let productID = p.productIdentifier
            selectProduct(productID: productID)
        case .purchasing:
            print("purhasing")
            print("produkt name: \(p.localizedTitle)") // after executing this line of code app crashes
        case .restored:
            let productID = p.productIdentifier
            selectProduct(productID: productID)
        }
        queue.finishTransaction(transaction)
    }
}

您有什么建议吗？我该如何解决？

Answer 1

在我的例子中，这个问题的有效解决方案是:

func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
    for transaction in transactions {
        print(transaction.error ?? "")
        switch transaction.transactionState {
        case .deferred:
            print("deffered")
            queue.finishTransaction(transaction)
        case let .failed(err):
            print("failed: \(err)")
            queue.finishTransaction(transaction)
        case .purchased:
            let productID = p.productIdentifier
            selectProduct(productID: productID)
            queue.finishTransaction(transaction)
        case .purchasing:
            print("purhasing")
        case .restored:
            let productID = p.productIdentifier
            selectProduct(productID: productID)
            queue.finishTransaction(transaction)
        }
    }
}