如何从应用内购买的iOS易耗品中获取productId？

import StoreKit

class ViewController: UIViewController, SKProductsRequestDelegate {
    // 定义一个数组来存储产品信息
    var products: [SKProduct] = []
    
    override func viewDidLoad() {
        super.viewDidLoad()
        
        // 发送请求获取产品信息
        let productIdentifiers: Set<String> = ["com.example.product1", "com.example.product2"]
        let request = SKProductsRequest(productIdentifiers: productIdentifiers)
        request.delegate = self
        request.start()
    }
    
    // 获取到产品信息的回调方法
    func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
        if response.products.count > 0 {
            // 遍历产品数组，获取productId
            for product in response.products {
                let productId = product.productIdentifier
                print("ProductId: \(productId)")
            }
        }
    }
}