iOS：在应用程序购买 Swift 成功后如何获取交易 ID 或收据数据

Question

我想知道成功购买后如何获取交易 ID 或收据信息，以便我可以发送到我的服务器并用于购买验证。 同样在同一主题上，我想知道如果在我将购买信息发送到我的服务器之前由于某种原因连接中断，那么我将如何将通知链接到购买订阅的用户？

谢谢

所以我想在下面开关的 .purchased 部分进行处理

import Foundation
import StoreKit

class StoreManager: NSObject, ObservableObject, SKProductsRequestDelegate, SKPaymentTransactionObserver {
    
    //FETCH PRODUCTS
    var request: SKProductsRequest!
    
    @Published var myProducts = [SKProduct]()
    
    func getProducts(productIDs: [String]) {
        print("Start requesting products ...")
        let request = SKProductsRequest(productIdentifiers: Set(productIDs))
        request.delegate = self
        request.start()
    }
    
    func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
        print("Did receive response")
        
        if !response.products.isEmpty {
            for fetchedProduct in response.products {
                DispatchQueue.main.async {
                    self.myProducts.append(fetchedProduct)
                }
            }
        }
        
        for invalidIdentifier in response.invalidProductIdentifiers {
            print("Invalid identifiers found: \(invalidIdentifier)")
        }
    }
    
    func request(_ request: SKRequest, didFailWithError error: Error) {
        print("Request did fail: \(error)")
    }
    
    //HANDLE TRANSACTIONS
    @Published var transactionState: SKPaymentTransactionState?
    
    func purchaseProduct(product: SKProduct) {
        if SKPaymentQueue.canMakePayments() {
            let payment = SKPayment(product: product)
            SKPaymentQueue.default().add(payment)
        } else {
            print("User can't make payment.")
        }
    }
    
    func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
        for transaction in transactions {
            switch transaction.transactionState {
            case .purchasing:
                transactionState = .purchasing
            case .purchased:
                UserDefaults.standard.setValue(true, forKey: transaction.payment.productIdentifier)
                queue.finishTransaction(transaction)
                transactionState = .purchased
            case .restored:
                UserDefaults.standard.setValue(true, forKey: transaction.payment.productIdentifier)
                queue.finishTransaction(transaction)
                transactionState = .restored
            case .failed, .deferred:
                print("Payment Queue Error: \(String(describing: transaction.error))")
                queue.finishTransaction(transaction)
                transactionState = .failed
            default:
                queue.finishTransaction(transaction)
            }
        }
    }
    
    func restoreProducts() {
        print("Restoring products ...")
        SKPaymentQueue.default().restoreCompletedTransactions()
    }
}

Answer 1

你可以试试这个——

if let url = Bundle.main.appStoreReceiptURL, 
   let data = try? Data(contentsOf: url) {
      let receiptBase64 = data.base64EncodedString()
      // Send to server
}

更新

想知道如果在接收字符串被发送到我的服务器之前连接被中断并且由于某种原因用户在我可以处理它之前删除了应用程序或其他东西，你会推荐什么。

1. 在 UserDefaults 中为名为needsToSendPurchaseReceiptToServer的变量存储一个true值。
2. 成功完成 API 调用后，将此更新为false 。
3. 如果 api 调用失败，请勿更新 UserDefaults 值。
4. 下次您的应用程序从后台appDidBecomeActive回调启动/或恢复时，您检查此标志，如果它仍然为true ，请再次尝试将收据发送到服务器。
5. 应该不需要向用户提供任何通知。
6. 如果多次失败，用户仍应能够通过Restore Purchase选项手动触发此操作。