第二次按下“恢复购买”按钮使应用程序崩溃

Posted 2023-03-16

【中文标题】第二次按下“恢复购买”按钮使应用程序崩溃

【英文标题】："Restore Purchases" button crashing app on 2nd press

【发布时间】：2019-06-30 22:23:07

【问题描述】：

我的恢复购买似乎可以正常工作，只是当您再次按下它时它会导致应用程序崩溃。有解决办法吗？这是我的代码：

import UIKit
import StoreKit

class SettingsVC: UIViewController, SKPaymentTransactionObserver 

@IBOutlet weak var restorePurchaseButton: UIButton!
@IBOutlet weak var privacyPolicyButton: UIButton!
@IBOutlet weak var termsofUseButton: UIButton!
@IBOutlet weak var unlockButton: UIButton!

override func viewDidLoad() 
    super.viewDidLoad()

    // Do any additional setup after loading the view.
    SKPaymentQueue.default().add(self)
    checkUnlockButton()




@IBAction func RestoreBtnClicked(_ sender: Any) 

    SKPaymentQueue.default().restoreCompletedTransactions()
    restorePurchaseButton.isEnabled = false



func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) 
    for transaction in transactions
       if transaction.transactionState == .restored
            UserDefaults.standard.set(true, forKey: "payment")
            SKPaymentQueue.default().finishTransaction(transaction)

       
    

编辑：这是第二个视图控制器。它包含允许用户购买产品的按钮。恢复购买按钮位于单独的视图控制器中。我对 Swift 比较陌生，所以请尝试为我降低答案，哈哈。

import Foundation
import UIKit
import StoreKit

class UnlockContentVC: UIViewController, SKPaymentTransactionObserver 

@IBOutlet weak var removeAds: UIButton!
@IBOutlet weak var noThanks: UIButton!

override func viewDidLoad() 
    //removeAds.layer.cornerRadius = 10

    SKPaymentQueue.default().add(self)

    removeAds.layer.cornerRadius = removeAds.frame.height / 2





@IBAction func dismissModal(_ sender: Any) 

    navigationController?.popViewController(animated: true)

    dismiss(animated: true, completion: nil)



@IBAction func OnClickUlockBtn(_ sender: Any) 
    if SKPaymentQueue.canMakePayments()
        //can make payments
        let paymentRequest = SKMutablePayment()
        paymentRequest.productIdentifier = productID
        SKPaymentQueue.default().add(paymentRequest)

    else
        //can't make payments
        print("Device can not make payments...")
    




func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) 
    for transaction in transactions
        if transaction.transactionState == SKPaymentTransactionState.purchased
            //User Payment Successfull
            UserDefaults.standard.set(true, forKey: "payment")
            print("payment was successfull")
            SKPaymentQueue.default().finishTransaction(transaction)
        else if transaction.transactionState == .failed
            //User Payment failed
            print("transaction failed...")
            SKPaymentQueue.default().finishTransaction(transaction)
            if let error = transaction.error 
                print("\(error.localizedDescription)")
            
         
    

【问题讨论】：

崩溃发生时的日志是什么意思？

@Chris 它在应用程序委托中，没有给我。它只是说“线程 1：EXC_BAD_ACCESS（代码=1，地址=0x10）”

该崩溃通常表明您强制解开 nil。添加异常断点以尝试找出崩溃发生的位置。此外，您不应在视图控制器viewDidLoad 中添加事务观察器。您需要在didFinishLaunching 中设置一个事务观察器，以便处理任何可能在之前的运行中挂起的未完成事务。

您缺少很多（可能）相关的 StoreKit 代码。特别是，paymentQueueRestoreCompletedTransactionsFinished 的代码是什么？请发布完整的 SK 代码，也许我可以提供帮助。

您应该只有一个SKPaymentTransactionObserver，并且您通常会在您的AppDelegate 中创建它。您仍然需要确定实际崩溃的线路。

【参考方案1】：

固定。

override func viewDidDisappear(_ animated: Bool) 
   SKPaymentQueue.default().remove(self)