ios - 应用内购买弹出窗口不会立即显示，而是会出现延迟

Question

我有以下用于应用内购买的代码。

现在，每当单击特定按钮时，我都会执行:IAPService.shared.purchase()。

它有效，但用户购买产品的可能性不会立即弹出 - 不知何故需要一段时间才能处理请求。这种延迟会导致误解，并且一些用户会向该按钮发送垃圾邮件。

有没有办法立即显示购买弹出窗口 - 我见过其他应用程序可以毫无延迟地运行。

class IAPService: NSObject {

    let defaults = UserDefaults.standard

    private override init() {}
    static let shared = IAPService()

    weak var delegate: CarViewController?

    var products = [SKProduct]()
    let paymentQueue = SKPaymentQueue.default()

    private var purchasedProductIdentifiers: Set<String> = []

    func getProducts() {
        let product: Set = ["IDIDID"]
        let request = SKProductsRequest(productIdentifiers: product)
        request.delegate = self
        request.start()
        paymentQueue.add(self)
    }

    func purchase() {
        guard let productToPurchase = products.first else { return }
        print(productToPurchase)
        let payment = SKPayment(product: productToPurchase)
        paymentQueue.add(payment)
    }

    func restorePurchases() {
        paymentQueue.restoreCompletedTransactions()
    }

}

extension IAPService: SKProductsRequestDelegate {

    func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
        self.products = response.products
        for product in response.products {
            print(product.localizedTitle)
        }
    }

}

extension IAPService: SKPaymentTransactionObserver {

    func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
        for transaction in transactions {
            print(transaction.transactionState.status(), transaction.payment.productIdentifier)
            if transaction.payment.productIdentifier == "IDIDID" && ( transaction.transactionState == .purchased || transaction.transactionState == .restored ) {
                premiumPurchased = true
                defaults.set(premiumPurchased, forKey: "premiumPurchased")
                print(premiumPurchased)
            }
            switch transaction.transactionState {
            case .purchasing: break
            case .purchased: goToAddCar(); queue.finishTransaction(transaction)
            default: queue.finishTransaction(transaction)
            }
        }
    }

    func goToAddCar() {
        let storyboard = UIStoryboard(name: "Main", bundle: nil)
        let controller = storyboard.instantiateViewController(withIdentifier: "AddCar") as! AddCarViewController
        UIApplication.shared.keyWindow?.rootViewController = controller
    }

}

extension SKPaymentTransactionState {
    func status() -> String {
        switch self {
        case .deferred: return "deferred"
        case .failed: return "failed"
        case .purchased: return "purchased"
        case .purchasing: return "purchasing"
        case .restored: return "restored"
        }
    }
}

Answer 1

在主线程上运行购买弹出窗口。您希望快速发生的任何 UI 更改都应该放在 DispatchQueue.main block 中。例如。在 func goToAddCar() 内部，将代码包装在 DispatchQueue.main.async block 中，如下所示

    DispatchQueue.main.async{

       let storyboard = UIStoryboard(name: "Main", bundle: nil)
       let controller = storyboard.instantiateViewController(withIdentifier: 
          "AddCar") as! AddCarViewController
       UIApplication.shared.keyWindow?.rootViewController = controller
    }