iOS沙箱环境自动续订订阅

Swift
import StoreKit
// 检查是否支持应用内购买
if SKPaymentQueue.canMakePayments() {
    // 启动支付队列
    SKPaymentQueue.default().add(self)
    
    // 创建产品请求
    let productRequest = SKProductsRequest(productIdentifiers: ["com.example.subscription"])
    productRequest.delegate = self
    productRequest.start()
} else {
    // 应用内购买不可用
    print("应用内购买不可用")
}
// 实现SKProductsRequestDelegate协议
extension ViewController: SKProductsRequestDelegate {
    func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
        if let product = response.products.first {
            // 发起购买请求
            let payment = SKPayment(product: product)
            SKPaymentQueue.default().add(payment)
        }
    }
    
    func request(_ request: SKRequest, didFAIlWithError error: Error) {
        // 请求失败处理
        print("请求失败: \(error.localizedDescription)")
    }
}
// 实现SKPaymentTransactionObserver协议
extension ViewController: SKPaymentTransactionObserver {
    func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
        for transaction in transactions {
            switch transaction.transactionState {
            case .purchased:
                // 处理购买成功逻辑
                print("购买成功")
                SKPaymentQueue.default().finishTransaction(transaction)
            case .fAIled:
                // 处理购买失败逻辑
                print("购买失败: \(transaction.error?.localizedDescription ?? "")")
                SKPaymentQueue.default().finishTransaction(transaction)
            case .restored:
                // 处理已恢复购买逻辑
                print("已恢复购买")
                SKPaymentQueue.default().finishTransaction(transaction)
            default:
                break
            }
        }
    }
}