【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。