问题描述
我已经完成了一个小应用程序，我有一个非消耗品购买选项。它在App Store上。
I have completed a small app where I have a non-consumable purchase option. It is on the App Store.
购买该产品运行正常。这是我的恢复购买功能似乎什么都不做。
The purchase of the product runs OK. It's my Restore Purchase function that seems to do nothing.
我已为恢复购买添加了此代码 @IBAction ：
I have added this code for the Restore Purchase @IBAction:
@IBAction func restorePurchases(sender: AnyObject) {
SKPaymentQueue.defaultQueue().addTransactionObserver(self)
SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
}
但是没有任何反应我点击了恢复购买按钮。
But nothing happens when I hit the restore purchase button.
我想我必须添加一个功能来检查恢复是否成功。我打算将代码修改为以下内容：
I think I have to add a function that checks if the restore was successful or not. Am planning to amend code to the following:
@IBAction func restorePurchases(sender: AnyObject) {
SKPaymentQueue.defaultQueue().addTransactionObserver(self)
SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
}
func paymentQueue(queue: SKPaymentQueue!, updatedTransactions transactions: [AnyObject]!) {
for transaction:AnyObject in transactions {
if let trans:SKPaymentTransaction = transaction as? SKPaymentTransaction{
switch trans.transactionState {
case .Restored:
SKPaymentQueue.defaultQueue().finishTransaction(transaction as SKPaymentTransaction)
var alert = UIAlertView(title: "Thank You", message: "Your purchase(s) were restored.", delegate: nil, cancelButtonTitle: "OK")
alert.show()
break;
case .Failed:
SKPaymentQueue.defaultQueue().finishTransaction(transaction as SKPaymentTransaction)
var alert = UIAlertView(title: "Sorry", message: "Your purchase(s) could not be restored.", delegate: nil, cancelButtonTitle: "OK")
alert.show()
break;
default:
break;
}
}
}
这会诀窍吗？
我已经完成了与影响恢复购买交易有关的每个主题，我的研究让我了解了上述内容。所以我不认为这是一个问题的重复，但也许可以澄清如何成功恢复面临我类似情况的其他人的购买。
I have been through every thread in relation to effecting Restore Purchase transactions, and my research has led me to the above. So I don't think this is a duplicate of a question, but perhaps may clarify how to successfully restore purchases for others facing my similar situation.
推荐答案
你的代码在大多数情况下看起来都很好，尽管有些部分似乎来自较旧的教程。你应该做一些改变，其中一个就是你需要再次调用你的unlockProduct函数。
Your codes looks pretty fine for the most part, although some parts seem to be from older tutorials . There is some changes you should make, one of them is that you need to call your unlockProduct function again.
这是我使用的代码（Swift 3）。
This is the code I use (Swift 3).
/// Updated transactions
func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
for transaction in transactions {
switch transaction.transactionState {
case .purchasing:
// Transaction is being added to the server queue.
case .purchased:
// Transaction is in queue, user has been charged. Client should complete the transaction.
defer {
queue.finishTransaction(transaction)
}
let productIdentifier = transaction.payment.productIdentifier
unlockProduct(withIdentifier: productIdentifier)
case .failed:
// Transaction was cancelled or failed before being added to the server queue.
defer {
queue.finishTransaction(transaction)
}
let errorCode = (transaction.error as? SKError)?.code
if errorCode == .paymentCancelled {
print("Transaction failed - user cancelled payment")
} else if errorCode == .paymentNotAllowed { // Will show alert automatically
print("Transaction failed - payments are not allowed")
} else {
print("Transaction failed - other error")
// Show alert with localised error description
}
case .restored:
// Transaction was restored from user's purchase history. Client should complete the transaction.
defer {
queue.finishTransaction(transaction)
}
if let productIdentifier = transaction.original?.payment.productIdentifier {
unlockProduct(withIdentifier: productIdentifier)
}
case .deferred:
// The transaction is in the queue, but its final status is pending external action
// e.g family member approval (FamilySharing).
// DO NOT freeze up app. Treate as if transaction has not started yet.
}
}
}
比使用委托方法显示恢复警报
Than use the delegate methods to show the restore alert
/// Restore finished
func paymentQueueRestoreCompletedTransactionsFinished(_ queue: SKPaymentQueue) {
guard queue.transactions.count != 0 else {
// showAlert that nothing restored
return
}
// show restore successful alert
}
/// Restore failed
func paymentQueue(_ queue: SKPaymentQueue, restoreCompletedTransactionsFailedWithError error: NSError) {
/// handle the restore error if you need to.
}
解锁产品只是一种方法我相信你已经拥有了。
Unlock product is just a method I am sure you already have too.
func unlockProduct(withIdentifier productIdentifier: String) {
switch productIdentifier {
/// unlock product for correct ID
}
}
作为旁注，你应该移动这一行
As a side note, you should move this line
SKPaymentQueue.default().add(self)
退出恢复和购买功能并将其放入viewDidLoad。
out of your restore and buy function and put it in viewDidLoad.
Apple建议您尽快添加事务观察器您的应用会启动，只有在您的应用关闭后才能将其删除遗憾的是，许多教程都没有正确地教你这个。这样您就不能确定任何不完整的交易，例如由于网络错误，将始终正确恢复。
Apple recommends you add the transaction observer as soon as your app launches and only remove it when your app is closed. A lot of tutorials unfortunately dont teach you this correctly. This way you unsure that any incomplete transactions e.g due to network error, will always resume correctly.
在我的实际项目中，我的IAP代码是在Singleton类中，所以我实际上使用委托将unlockProduct方法转发到处理gameData的类。我还可以确保在应用启动时添加观察者。
In my real projects my code for IAPs is in a Singleton class so I would actually using delegation to forward the unlockProduct method to my class that handles gameData. I can than also make sure the observer is added at app launch.
希望这有帮助
这篇关于恢复购买：非消耗品的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！