SKPaymentTransaction.transactionState始终为.restored

Question

我正在测试我的应用程序的自动续订订阅，但SKPaymentTransaction.transactionState从不更改为.purchased，它始终是.restored。一切正常，但是自从我第一次调用SKPaymentQueue.default().restoreCompletedTransactions()以来，除了.restored什么也得不到。我尝试从我的iPhone中删除应用程序，重新登录到我的沙盒帐户，创建一个新的沙盒帐户，重新启动Xcode，清理build文件夹，...我哪里做错了？请在下面找到我的代码：

func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
    for transaction in transactions {
        let appDelegate = UIApplication.shared.delegate as! AppDelegate
        switch transaction.transactionState {
        case .purchased:
            SKPaymentQueue.default().finishTransaction(transaction)
            print(".purchased")
        case .failed:
            SKPaymentQueue.default().finishTransaction(transaction)
            print(".failed")
        case .restored:
            SKPaymentQueue.default().finishTransaction(transaction)
            print(".restored")
        default:
            break
        }
    }
}

@IBAction func restore(_ sender: UIBarButtonItem) {
    SKPaymentQueue.default().restoreCompletedTransactions()
}

func subscribe() {
    if SKPaymentQueue.canMakePayments() {
        let payment = SKPayment(product: availableProducts[indexPath.row])
        SKPaymentQueue.default().add(payment)
    }
}

override func viewDidLoad() {
    super.viewDidLoad()

    SKPaymentQueue.default().add(self)
}

Answer 1

可能，它总是.restored，因为transaction还没有完成。

通常我们将SKPaymentQueue.default().add(observer)放在AppDelegate中，

以使事务始终得到处理。

 class AppDelegate{

      func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
            SKPaymentQueue.default().add(self)
      }

}

extension AppDelegate: SKPaymentTransactionObserver {

      func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
            // ...
      }
}

当你把SKPaymentQueue.default().add(observer)放在ViewController中时，因为ViewController可能会被推送和弹出。

也就是说，ViewController实例被分配和释放。

因为事务处理是异步的，所以对应于它的事务的ViewController实例可能不存在，或者不是同一个实例。

所以它表现得很有女人味。

Answer 2

我在这里发现：Clearing SKPAymentsQueue : Forcing Unfinished Transactions To Finish我的问题是我有一些未完成的未决事务，所以我在我的viewDidLoad中添加了这个，以“强制”完成所有这些事务。我是否应该永久包含它，以避免再次发生这种情况？

let currentQueue: SKPaymentQueue = SKPaymentQueue.default();
for transaction in currentQueue.transactions {
    currentQueue.finishTransaction(transaction);
}

Answer 3

应该检查队列的结果

let transactions = queue.transactions
    if transactions.count > 0 {
        for transaction in queue.transactions {
            if (transaction.transactionState == SKPaymentTransactionState.failed) {
                //possibly handle the error
                purchaseStatusBlock?(.failed)
            } else if (transaction.transactionState == SKPaymentTransactionState.purchased) {
                //deliver the content to the user
                purchaseStatusBlock?(.purchased)
            } else if (transaction.transactionState == SKPaymentTransactionState.restored) {
                //deliver the content to the user
                purchaseStatusBlock?(.restored)
            } else {
                //handle other transaction states
            }
        }
    } else {
        purchaseStatusBlock?(.failed)
    }