ios - 当用户没有付款方式时不调用事务观察器

Question

我的 iap 问题从用户没有付款方式开始。iaps 在沙盒（也被中断的模拟）和现实世界中工作。但是在真正的应用程序中（从 appstore 下载 - 我在 ios 12 - iphone 6 中测试过），如果我没有支付方式应用程序警告我添加一个。然后 appstore 应用程序打开（我的应用程序进入后台），我输入所有要购买的信用卡功能。一切顺利，appstore 提示我您购买了产品。但是在返回我的应用程序（将其置于前台）之后，什么也没有发生。我无法获得有关交易的任何信息。即使我添加了 appdidbecomeactive 观察者来再次捕获未完成的交易。再次没有...然后我在应用程序启动中添加了 unfinishedTransaction 函数。如果我终止应用程序并重新开始。它捕获未完成的交易并执行我的代码。但是没有付款方式的用户认为该应用程序不起作用，他们要求退款。所以他们是对的，我正在偿还或更改他们的数据库。我该如何处理这个问题？我什至无法在沙盒中测试它。每次我给苹果定价测试。请帮我。

Answer 1

otherViewcontroller
@objc func saveBtnTUI() { 
    mainVC.messageSN(subject: subjectTF.text!, explain: explainTV.text!) 
    }

在调用支付功能之后，我正在处理我的数据库连接以在 mainviewcontroller 中打开新草稿......

import StoreKit
MainViewcontroller, SKPaymentTransactionObserver    
func pay() { 
    SKPaymentQueue.default().add(SKPayment(product: product)) SKPaymentQueue.default().add(self) 
    }

    func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
            for transaction in transactions {
                ...
                case .purchased: complete(transaction: transaction); break
                case .failed: fail(transaction: transaction); break
                ...
    }
    }

    func complete(transaction: SKPaymentTransaction) {
            print("complete...")
            DispatchQueue.main.async { self.paymentID = transaction.transactionIdentifier!; self.paySN()}
            SKPaymentQueue.default().finishTransaction(transaction);  SKPaymentQueue.default().remove(self)
        }
         
        func fail(transaction: SKPaymentTransaction) {
            DispatchQueue.main.async {self.view.viewWithTag(999)?.removeFromSuperview()}
            
            if let err = transaction.error as? SKError {
                if err.code != .paymentCancelled {
                    var mStr:String = "", statusStr:String = ""; print("fail", err.localizedDescription, err.code.self)
                    if err.code == .clientInvalid {mStr = "..."; statusStr = mStr}
                    else if err.code == .cloudServiceNetworkConnectionFailed {mStr = "..."; statusStr = mStr}
                    else if err.code == .cloudServicePermissionDenied {mStr = "..."; statusStr = mStr}
                    else if err.code == .cloudServiceRevoked {mStr = "..."; statusStr = mStr}
                    else if err.code == .paymentInvalid {mStr = "..."; statusStr = mStr}
                    else if err.code == .paymentNotAllowed {mStr = "..."; statusStr = mStr}
                    else if err.code == .storeProductNotAvailable {mStr = "..."; statusStr = mStr}
                    else {mStr = "..."; statusStr = "..."}
                    
                    if #available(iOS 12.2, *) {
                        if err.code == .invalidOfferIdentifier {mStr = "..."; statusStr = mStr}
                        else if err.code == .invalidOfferPrice {mStr = "..."; statusStr = mStr}
                        else if err.code == .invalidSignature {mStr = "..."; statusStr = mStr}
                        else if err.code == .missingOfferParams {mStr = "..."; statusStr = mStr}
                    } else {
                        mStr = "..."; statusStr = "..."
                    }
                    
                    let alert = UIAlertController(title: NSLocalizedString("ERROR", comment: ""), message: mStr, preferredStyle: .alert)
                    let cancelA = UIAlertAction(title: NSLocalizedString("OK", comment: ""), style: .cancel, handler: nil); alert.addAction(cancelA)
                    self.present(alert, animated: true, completion: nil)
                    self.paymentStatusSN(status: "fail", message: statusStr)
                }
                else {print("..."); self.paymentStatusSN(status: "cancel", message: "...")}
            }
            else {
                let alert = UIAlertController(title: NSLocalizedString("ERROR", comment: ""), message: "...", preferredStyle: .alert)
                let cancelA = UIAlertAction(title: NSLocalizedString("OK", comment: ""), style: .cancel, handler: nil); alert.addAction(cancelA)
                self.present(alert, animated: true, completion: nil)
                self.paymentStatusSN(status: "fail", message: "...")
            }
            SKPaymentQueue.default().finishTransaction(transaction); SKPaymentQueue.default().remove(self)
        }