iPhone 应用程序：如何通过 iOS 配置门户续订过期的分发证书

如何通过iOS配置门户续订过期的分发证书

swift
import StoreKit
func configureSubscriptionExpiration() {
    let productIdentifiers: Set = ["com.example.app.subscription"]
    
    SKPaymentQueue.default().add(StoreObserver.shared)
    
    if SKPaymentQueue.canMakePayments() {
        let request = SKProductsRequest(productIdentifiers: productIdentifiers)
        request.delegate = self
        request.start()
    }
}
extension YourViewController: SKProductsRequestDelegate {
    func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
        let products = response.products
        
        for product in products {
            if product.productIdentifier == "com.example.app.subscription" {
                let payment = SKPayment(product: product)
                SKPaymentQueue.default().add(payment)
            }
        }
    }
}
class StoreObserver: NSObject, SKPaymentTransactionObserver {
    static let shared = StoreObserver()
    
    func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
        for transaction in transactions {
            switch transaction.transactionState {
            case .purchased:
                // 处理购买成功的逻辑
                queue.finishTransaction(transaction)
            case .restored:
                // 处理已恢复购买的逻辑
                queue.finishTransaction(transaction)
            case .failed:
                // 处理购买失败的逻辑
                queue.finishTransaction(transaction)
            default:
                break
            }
        }
    }
}