在通过应用内购买移除广告时，此功能是否无法识别我的密钥？

Question

广告效果很好。但是，当我添加if else语句来确定用户是否付费删除广告时，即使他们没有付费删除广告，广告也不会弹出。我得到的唯一打印声明是“它叫做某事”，所以我觉得“购买”键有问题。我检查确保它们匹配。我是否对钥匙做错了什么？

func showAd() {

    if let purchased = UserDefaults.standard.value(forKey: "Purchased") as? Bool{
        if purchased == true{
            interstitial = nil
            print("there is no ad!!!!")
        }else{
            self.interstitial = createInterstitialAd()
            print("there is an ad!!!")
        }
    } else {
        print("it called something")
    }

}

编辑：这是我设置密钥的代码。

func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
    for transaction in transactions{
        if transaction.transactionState == SKPaymentTransactionState.purchased{
            //User Payment Successfull
            UserDefaults.standard.set(true, forKey: "Purchased")
            print("payment was successfull")
            SKPaymentQueue.default().finishTransaction(transaction)
            let storyboard = UIStoryboard(name: "Main", bundle: nil)
            let controller = storyboard.instantiateViewController(withIdentifier: "homeVC")
            self.navigationController?.pushViewController(controller, animated: true)

        }else if transaction.transactionState == .failed{
            //User Payment failed
            print("transaction failed...")
            SKPaymentQueue.default().finishTransaction(transaction)
            if let error = transaction.error {
                print("\(error.localizedDescription)")
            }
        } 
    }
}

Answer 1

改变这一行：

if let purchased = UserDefaults.standard.value(forKey: "Purchased") as? Bool

至：

if let purchased = UserDefaults.standard.bool(forKey: "Purchased")

这使得purchased不是可选的。这样，if purchased将永远被召唤。

事实上，我会摆脱if let，因为它不能是零：

let purchased = UserDefaults.standard.bool(forKey: "Purchased")