Swift：购买完成后如何通知

Question

我在购买完成时进行SKPaymentTransactionObserver检查

extension IAPService: SKPaymentTransactionObserver {
func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
    for transaction in transactions {
        print(transaction.transactionState.status(), transaction.payment.productIdentifier)
        if transaction.transactionState.status() == "purchased" {
            // Pro Purchased
        }
        switch transaction.transactionState {
        case .purchasing: break
        default: queue.finishTransaction(transaction)
        }
    }
}
}

如何在购买完成时购买的ViewController上隐藏对象

Answer 1

您可以在IAPService类中创建一个闭包：

var productDidPurchased: (() -> Void)?

然后在您的扩展程序中，您可以这样使用它：

switch transaction.transactionState {
    case .purchasing: 
        break
    case .purchased:
        productDidPurchased?()
    default:
        queue.finishTransaction(transaction)
}

然后在你的ViewController中检索它：

IAPService.shared.productDidPurchased = { 
    [weak self] in 
    //you will receive a callback when the product is purchased and can hide your view here 
}