【发布时间】：2019-11-05 13:30:43
【问题描述】：
我有以下代码来进行应用内购买。一切正常，用户可以通过点击按钮购买（非消耗品）。
目前我在 AppDelegate 内部调用 getProducts() 和 restorePurchases() - 当用户已经购买时，我假设它将使用 restorePurchases() 获取 - 我如何检测特定产品是否与其ID 已购买隐藏那个按钮。
import Foundation
import StoreKit
class IAPService: NSObject {
private override init() {}
static let shared = IAPService()
var products = [SKProduct]()
let paymentQueue = SKPaymentQueue.default()
private var purchasedProductIdentifiers: Set<String> = []
func getProducts() {
let product: Set = ["123456"]
let request = SKProductsRequest(productIdentifiers: product)
request.delegate = self
request.start()
paymentQueue.add(self)
}
func purchase() {
guard let productToPurchase = products.first else { return }
print(productToPurchase)
let payment = SKPayment(product: productToPurchase)
paymentQueue.add(payment)
}
func restorePurchases() {
paymentQueue.restoreCompletedTransactions()
}
}
extension IAPService: SKProductsRequestDelegate {
func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
self.products = response.products
for product in response.products {
print(product.localizedTitle)
}
}
}
extension IAPService: SKPaymentTransactionObserver {
func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
for transaction in transactions {
print(transaction.transactionState.status(), transaction.payment.productIdentifier)
switch transaction.transactionState {
case .purchasing: break
default: queue.finishTransaction(transaction)
}
}
}
}
extension SKPaymentTransactionState {
func status() -> String {
switch self {
case .deferred: return "deferred"
case .failed: return "failed"
case .purchased: return "purchased"
case .purchasing: return "purchasing"
case .restored: return "restored"
}
}
}
【问题讨论】：
标签： ios swift in-app-purchase