IAP按钮有回调吗？

Question

我正在使用 RevenueCat 进行订阅。当我进行测试购买时它工作正常，但我遇到了一个奇怪的问题。我有一个单独的“购买”按钮，按下时会出现 RevenueCat 操作表。

如果我按右上角的小 x 按钮将其关闭，或者按 actionSheet 外部的

Purchases.shared.purchase

内部，

.purchaseCancelledError

会被调用。但是，如果我按蓝色的“订阅”按钮，然后按警报的“确定”按钮，则不会发生任何情况。没有触发回调，我不知道用户购买了订阅。

我如何知道用户何时点击“订阅”，然后按下“全部设置”警报中的“确定”按钮？

func purchaseButtonTapped() {

    let productID = "..."

    Purchases.shared.getOfferings { [weak self](offerings, error) in
        guard let _ = error else { return }

        for dict in offerings.all {
                
            let offering = dict.value
            let packages = offering.availablePackages
                
            if let indexOfItem = packages.firstIndex(where: { $0.storeProduct.productIdentifier == productID }) {
                    
                let pkg = packages[indexOfItem]
                    
                self?.showSystemActionSheet(for: pkg)
                break
            }
        }
    }
}

func showSystemActionSheet() {

    Purchases.shared.purchase(package: package) { (transaction, customerInfo, error, userCancelled) in

        if let error = error as? RevenueCat.ErrorCode {
            switch error {
            case .purchaseCancelledError: // *** using breakpoints this gets hit when I cancel or dismiss the actionSheet
                return
            case .productAlreadyPurchasedError, .operationAlreadyInProgressForProductError, .receiptInUseByOtherSubscriberError :
                print("purchase is active")
            case .purchaseNotAllowedError:
                print("purchases_not_allowed")
            case .purchaseInvalidError:
                print("invalid_purchase_check_payment_method")
            default: break
            }
            return
        }

        if userCancelled {
            return 
        }

        guard let customerInfo = customerInfo else { 
            return 
        }

        // after the user pressed Subscribe then pressed the OK button from the You're All Set alert, this print statement should get print/get hit with a break point but it never does
        print("the subscribe button and You're All Set alert was tapped")
    }
}

Answer 1

不幸的是，Apple 没有提供回调来了解“一切就绪”对话框何时关闭。这是在操作系统级别控制的，因此即使像 RevenueCat 这样的工具也无法对其进行任何控制。