我知道我现在发表这篇文章有点晚了，但我在学习IAP模式时也分享了类似的经验。

应用内购买是由Storekit框架实现的iOS中最全面的工作流之一。如果你有耐心阅读的话，整个文档是非常清晰的，但在技术层面上有点高级。

总结:

1 -请求产品-使用SKProductRequest和SKProductRequestDelegate类发出产品id请求，并从您自己的itunesconnect商店接收它们。

这些SKProducts应该用来填充您的商店UI，用户可以使用该UI购买特定的产品。

2 -发出付款请求-使用SKPayment & SKPaymentQueue将付款添加到事务队列中。

3 -监视事务队列的状态更新-使用SKPaymentTransactionObserver协议的updatedTransactions方法来监视状态:

SKPaymentTransactionStatePurchasing - don't do anything
SKPaymentTransactionStatePurchased - unlock product, finish the transaction
SKPaymentTransactionStateFailed - show error, finish the transaction
SKPaymentTransactionStateRestored - unlock product, finish the transaction

4 -恢复按钮流-使用SKPaymentQueue的restoreCompletedTransactions来完成这一点-步骤3将照顾剩下的，以及SKPaymentTransactionObserver的以下方法:

paymentQueueRestoreCompletedTransactionsFinished
restoreCompletedTransactionsFailedWithError

这里有一个循序渐进的教程(由我撰写，因为我自己试图理解它)，解释它。最后还提供了可以直接使用的代码示例。

这是我创建的另一个解释某些只有文本才能更好地描述的事情。

RMStore是一个轻量级的iOS内购库。它包装了StoreKit API，并为异步请求提供了方便的块。购买一个产品就像调用一个方法一样简单。

对于高级用户，这个库还提供了收据验证、内容下载和事务持久性。

我知道我现在发表这篇文章有点晚了，但我在学习IAP模式时也分享了类似的经验。

应用内购买是由Storekit框架实现的iOS中最全面的工作流之一。如果你有耐心阅读的话，整个文档是非常清晰的，但在技术层面上有点高级。

总结:

1 -请求产品-使用SKProductRequest和SKProductRequestDelegate类发出产品id请求，并从您自己的itunesconnect商店接收它们。

这些SKProducts应该用来填充您的商店UI，用户可以使用该UI购买特定的产品。

2 -发出付款请求-使用SKPayment & SKPaymentQueue将付款添加到事务队列中。

3 -监视事务队列的状态更新-使用SKPaymentTransactionObserver协议的updatedTransactions方法来监视状态:

SKPaymentTransactionStatePurchasing - don't do anything
SKPaymentTransactionStatePurchased - unlock product, finish the transaction
SKPaymentTransactionStateFailed - show error, finish the transaction
SKPaymentTransactionStateRestored - unlock product, finish the transaction

4 -恢复按钮流-使用SKPaymentQueue的restoreCompletedTransactions来完成这一点-步骤3将照顾剩下的，以及SKPaymentTransactionObserver的以下方法:

paymentQueueRestoreCompletedTransactionsFinished
restoreCompletedTransactionsFailedWithError

这里有一个循序渐进的教程(由我撰写，因为我自己试图理解它)，解释它。最后还提供了可以直接使用的代码示例。

这是我创建的另一个解释某些只有文本才能更好地描述的事情。

只需将Jojodmo代码翻译成Swift:

class InAppPurchaseManager: NSObject , SKProductsRequestDelegate, SKPaymentTransactionObserver{





//If you have more than one in-app purchase, you can define both of
//of them here. So, for example, you could define both kRemoveAdsProductIdentifier
//and kBuyCurrencyProductIdentifier with their respective product ids
//
//for this example, we will only use one product

let kRemoveAdsProductIdentifier = "put your product id (the one that we just made in iTunesConnect) in here"

@IBAction func tapsRemoveAds() {

    NSLog("User requests to remove ads")

    if SKPaymentQueue.canMakePayments() {
        NSLog("User can make payments")

        //If you have more than one in-app purchase, and would like
        //to have the user purchase a different product, simply define
        //another function and replace kRemoveAdsProductIdentifier with
        //the identifier for the other product
        let set : Set<String> = [kRemoveAdsProductIdentifier]
        let productsRequest = SKProductsRequest(productIdentifiers: set)
        productsRequest.delegate = self
        productsRequest.start()

    }
    else {
        NSLog("User cannot make payments due to parental controls")
        //this is called the user cannot make payments, most likely due to parental controls
    }
}


func purchase(product : SKProduct) {

    let payment = SKPayment(product: product)
    SKPaymentQueue.defaultQueue().addTransactionObserver(self)
    SKPaymentQueue.defaultQueue().addPayment(payment)
}

func restore() {
    //this is called when the user restores purchases, you should hook this up to a button
    SKPaymentQueue.defaultQueue().addTransactionObserver(self)
    SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
}


func doRemoveAds() {
    //TODO: implement
}

/////////////////////////////////////////////////
//////////////// store delegate /////////////////
/////////////////////////////////////////////////
// MARK: - store delegate -


func productsRequest(request: SKProductsRequest, didReceiveResponse response: SKProductsResponse) {

    if let validProduct = response.products.first {
        NSLog("Products Available!")
        self.purchase(validProduct)
    }
    else {
        NSLog("No products available")
        //this is called if your product id is not valid, this shouldn't be called unless that happens.
    }
}

func paymentQueueRestoreCompletedTransactionsFinished(queue: SKPaymentQueue) {


    NSLog("received restored transactions: \(queue.transactions.count)")
    for transaction in queue.transactions {
        if transaction.transactionState == .Restored {
            //called when the user successfully restores a purchase
            NSLog("Transaction state -> Restored")

            //if you have more than one in-app purchase product,
            //you restore the correct product for the identifier.
            //For example, you could use
            //if(productID == kRemoveAdsProductIdentifier)
            //to get the product identifier for the
            //restored purchases, you can use
            //
            //NSString *productID = transaction.payment.productIdentifier;
            self.doRemoveAds()
            SKPaymentQueue.defaultQueue().finishTransaction(transaction)
            break;
        }
    }
}


func paymentQueue(queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {

    for transaction in transactions {
        switch transaction.transactionState {
        case .Purchasing: NSLog("Transaction state -> Purchasing")
            //called when the user is in the process of purchasing, do not add any of your own code here.
        case .Purchased:
            //this is called when the user has successfully purchased the package (Cha-Ching!)
            self.doRemoveAds() //you can add your code for what you want to happen when the user buys the purchase here, for this tutorial we use removing ads
            SKPaymentQueue.defaultQueue().finishTransaction(transaction)
            NSLog("Transaction state -> Purchased")
        case .Restored:
            NSLog("Transaction state -> Restored")
            //add the same code as you did from SKPaymentTransactionStatePurchased here
            SKPaymentQueue.defaultQueue().finishTransaction(transaction)
        case .Failed:
            //called when the transaction does not finish
            if transaction.error?.code == SKErrorPaymentCancelled {
                NSLog("Transaction state -> Cancelled")
                //the user cancelled the payment ;(
            }
            SKPaymentQueue.defaultQueue().finishTransaction(transaction)
        case .Deferred:
            // The transaction is in the queue, but its final status is pending external action.
            NSLog("Transaction state -> Deferred")

        }


    }
}
} 

迅速的回答

这是为了补充我的Objective-C答案给Swift用户，以防止Objective-C答案变得太大。

设置

首先，在appstoreconnect.apple.com上设置应用内购买。遵循我的Objective-C答案的开始部分(步骤1-13，在App Store Connect标题下)，获得如何做到这一点的指导。

你的产品ID可能需要几个小时才能在App Store Connect上注册，所以要有耐心。

现在你已经在App Store Connect上设置了应用内购买信息，我们需要将苹果的应用内购买框架StoreKit添加到应用中。

进入你的Xcode项目，进入应用程序管理器(左上角类似蓝色页面的图标，你的应用程序文件在那里)。点击左边目标下的应用程序(这应该是第一个选项)，然后转到顶部的“功能”。在列表中，你应该看到一个选项“In-App Purchase”。打开这个功能，Xcode会将StoreKit添加到你的项目中。

编码

现在，我们要开始编码了!

首先，创建一个新的swift文件来管理你所有的应用内购买。我将把它命名为iapmanager。swift。

在这个文件中，我们将创建一个名为IAPManager的新类，它是一个SKProductsRequestDelegate和SKPaymentTransactionObserver。在顶部，确保导入Foundation和StoreKit

import Foundation
import StoreKit

public class IAPManager: NSObject, SKProductsRequestDelegate,
                         SKPaymentTransactionObserver {
}

接下来，我们将添加一个变量来定义应用内购买的标识符(你也可以使用枚举，如果你有多个iap，这将更容易维护)。

// This should the ID of the in-app-purchase you made on AppStore Connect.
// if you have multiple IAPs, you'll need to store their identifiers in
// other variables, too (or, preferably in an enum).
let removeAdsID = "com.skiplit.removeAds"

接下来，让我们为我们的类添加一个初始化式:

// This is the initializer for your IAPManager class
//
// A better, and more scaleable way of doing this
// is to also accept a callback in the initializer, and call
// that callback in places like the paymentQueue function, and
// in all functions in this class, in place of calls to functions
// in RemoveAdsManager (you'll see those calls in the code below).

let productID: String
init(productID: String){
    self.productID = productID
}

现在，我们将为SKProductsRequestDelegate和SKPaymentTransactionObserver添加所需的函数:

稍后我们将添加RemoveAdsManager类

// This is called when a SKProductsRequest receives a response
public func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse){
    // Let's try to get the first product from the response
    // to the request
    if let product = response.products.first{
        // We were able to get the product! Make a new payment
        // using this product
        let payment = SKPayment(product: product)

        // add the new payment to the queue
        SKPaymentQueue.default().add(self)
        SKPaymentQueue.default().add(payment)
    }
    else{
        // Something went wrong! It is likely that either
        // the user doesn't have internet connection, or
        // your product ID is wrong!
        //
        // Tell the user in requestFailed() by sending an alert,
        // or something of the sort

        RemoveAdsManager.removeAdsFailure()
    }
}

// This is called when the user restores their IAP sucessfully
private func paymentQueueRestoreCompletedTransactionsFinished(_ queue: SKPaymentQueue){
    // For every transaction in the transaction queue...
    for transaction in queue.transactions{
        // If that transaction was restored
        if transaction.transactionState == .restored{
            // get the producted ID from the transaction
            let productID = transaction.payment.productIdentifier

            // In this case, we have only one IAP, so we don't need to check
            // what IAP it is. However, this is useful if you have multiple IAPs!
            // You'll need to figure out which one was restored
            if(productID.lowercased() == IAPManager.removeAdsID.lowercased()){
                // Restore the user's purchases
                RemoveAdsManager.restoreRemoveAdsSuccess()
            }

            // finish the payment
            SKPaymentQueue.default().finishTransaction(transaction)
        }
    }
}

// This is called when the state of the IAP changes -- from purchasing to purchased, for example.
// This is where the magic happens :)
public func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]){
    for transaction in transactions{
        // get the producted ID from the transaction
        let productID = transaction.payment.productIdentifier

        // In this case, we have only one IAP, so we don't need to check
        // what IAP it is.
        // However, if you have multiple IAPs, you'll need to use productID
        // to check what functions you should run here!

        switch transaction.transactionState{
        case .purchasing:
            // if the user is currently purchasing the IAP,
            // we don't need to do anything.
            //
            // You could use this to show the user
            // an activity indicator, or something like that
            break
        case .purchased:
            // the user successfully purchased the IAP!
            RemoveAdsManager.removeAdsSuccess()
            SKPaymentQueue.default().finishTransaction(transaction)
        case .restored:
                // the user restored their IAP!
                IAPTestingHandler.restoreRemoveAdsSuccess()
                SKPaymentQueue.default().finishTransaction(transaction)
        case .failed:
                // The transaction failed!
                RemoveAdsManager.removeAdsFailure()
                // finish the transaction
                SKPaymentQueue.default().finishTransaction(transaction)
        case .deferred:
                // This happens when the IAP needs an external action
                // in order to proceeded, like Ask to Buy
                RemoveAdsManager.removeAdsDeferred()
                break
        }
    }
}

现在让我们添加一些可以用来开始购买或恢复购买的函数:

// Call this when you want to begin a purchase
// for the productID you gave to the initializer
public func beginPurchase(){
    // If the user can make payments
    if SKPaymentQueue.canMakePayments(){
        // Create a new request
        let request = SKProductsRequest(productIdentifiers: [productID])
        // Set the request delegate to self, so we receive a response
        request.delegate = self
        // start the request
        request.start()
    }
    else{
        // Otherwise, tell the user that
        // they are not authorized to make payments,
        // due to parental controls, etc
    }
}

// Call this when you want to restore all purchases
// regardless of the productID you gave to the initializer
public func beginRestorePurchases(){
    // restore purchases, and give responses to self
    SKPaymentQueue.default().add(self)
    SKPaymentQueue.default().restoreCompletedTransactions()
}

接下来，让我们添加一个新的工具类来管理我们的iap。所有这些代码都可以在一个类中，但是有多个类会使它更简洁。我要创建一个新类，叫RemoveAdsManager，在里面放一些函数

public class RemoveAdsManager{

    class func removeAds()
    class func restoreRemoveAds()

    class func areAdsRemoved() -> Bool

    class func removeAdsSuccess()
    class func restoreRemoveAdsSuccess()
    class func removeAdsDeferred()
    class func removeAdsFailure()
}

前三个函数，removeAds, restoreRemoveAds和areAdsRemoved，是您将调用来执行某些操作的函数。最后四个是由IAPManager调用的。

让我们为前两个函数removeAds和restoreRemoveAds添加一些代码:

// Call this when the user wants
// to remove ads, like when they
// press a "remove ads" button
class func removeAds(){
    // Before starting the purchase, you could tell the
    // user that their purchase is happening, maybe with
    // an activity indicator

    let iap = IAPManager(productID: IAPManager.removeAdsID)
    iap.beginPurchase()
}

// Call this when the user wants
// to restore their IAP purchases,
// like when they press a "restore
// purchases" button.
class func restoreRemoveAds(){
    // Before starting the purchase, you could tell the
    // user that the restore action is happening, maybe with
    // an activity indicator

    let iap = IAPManager(productID: IAPManager.removeAdsID)
    iap.beginRestorePurchases()
}

最后，让我们在最后五个函数中添加一些代码。

// Call this to check whether or not
// ads are removed. You can use the
// result of this to hide or show
// ads
class func areAdsRemoved() -> Bool{
    // This is the code that is run to check
    // if the user has the IAP.

    return UserDefaults.standard.bool(forKey: "RemoveAdsPurchased")
}

// This will be called by IAPManager
// when the user sucessfully purchases
// the IAP
class func removeAdsSuccess(){
    // This is the code that is run to actually
    // give the IAP to the user!
    //
    // I'm using UserDefaults in this example,
    // but you may want to use Keychain,
    // or some other method, as UserDefaults
    // can be modified by users using their
    // computer, if they know how to, more
    // easily than Keychain

    UserDefaults.standard.set(true, forKey: "RemoveAdsPurchased")
    UserDefaults.standard.synchronize()
}

// This will be called by IAPManager
// when the user sucessfully restores
//  their purchases
class func restoreRemoveAdsSuccess(){
    // Give the user their IAP back! Likely all you'll need to
    // do is call the same function you call when a user
    // sucessfully completes their purchase. In this case, removeAdsSuccess()

    removeAdsSuccess()
}

// This will be called by IAPManager
// when the IAP failed
class func removeAdsFailure(){
    // Send the user a message explaining that the IAP
    // failed for some reason, and to try again later
}

// This will be called by IAPManager
// when the IAP gets deferred.
class func removeAdsDeferred(){
    // Send the user a message explaining that the IAP
    // was deferred, and pending an external action, like
    // Ask to Buy.
}

把所有这些放在一起，我们得到了这样的结果:

import Foundation
import StoreKit

public class RemoveAdsManager{

    // Call this when the user wants
    // to remove ads, like when they
    // press a "remove ads" button
    class func removeAds(){
        // Before starting the purchase, you could tell the
        // user that their purchase is happening, maybe with
        // an activity indicator

        let iap = IAPManager(productID: IAPManager.removeAdsID)
        iap.beginPurchase()
    }

    // Call this when the user wants
    // to restore their IAP purchases,
    // like when they press a "restore
    // purchases" button.
    class func restoreRemoveAds(){
        // Before starting the purchase, you could tell the
        // user that the restore action is happening, maybe with
        // an activity indicator

        let iap = IAPManager(productID: IAPManager.removeAdsID)
        iap.beginRestorePurchases()
    }

    // Call this to check whether or not
    // ads are removed. You can use the
    // result of this to hide or show
    // ads
    class func areAdsRemoved() -> Bool{
        // This is the code that is run to check
        // if the user has the IAP.

        return UserDefaults.standard.bool(forKey: "RemoveAdsPurchased")
    }

    // This will be called by IAPManager
    // when the user sucessfully purchases
    // the IAP
    class func removeAdsSuccess(){
        // This is the code that is run to actually
        // give the IAP to the user!
        //
        // I'm using UserDefaults in this example,
        // but you may want to use Keychain,
        // or some other method, as UserDefaults
        // can be modified by users using their
        // computer, if they know how to, more
        // easily than Keychain

        UserDefaults.standard.set(true, forKey: "RemoveAdsPurchased")
        UserDefaults.standard.synchronize()
    }

    // This will be called by IAPManager
    // when the user sucessfully restores
    //  their purchases
    class func restoreRemoveAdsSuccess(){
        // Give the user their IAP back! Likely all you'll need to
        // do is call the same function you call when a user
        // sucessfully completes their purchase. In this case, removeAdsSuccess()
        removeAdsSuccess()
    }

    // This will be called by IAPManager
    // when the IAP failed
    class func removeAdsFailure(){
        // Send the user a message explaining that the IAP
        // failed for some reason, and to try again later
    }

    // This will be called by IAPManager
    // when the IAP gets deferred.
    class func removeAdsDeferred(){
        // Send the user a message explaining that the IAP
        // was deferred, and pending an external action, like
        // Ask to Buy.
    }

}

public class IAPManager: NSObject, SKProductsRequestDelegate, SKPaymentTransactionObserver{

    // This should the ID of the in-app-purchase you made on AppStore Connect.
    // if you have multiple IAPs, you'll need to store their identifiers in
    // other variables, too (or, preferably in an enum).
    static let removeAdsID = "com.skiplit.removeAds"

    // This is the initializer for your IAPManager class
    //
    // An alternative, and more scaleable way of doing this
    // is to also accept a callback in the initializer, and call
    // that callback in places like the paymentQueue function, and
    // in all functions in this class, in place of calls to functions
    // in RemoveAdsManager.
    let productID: String
    init(productID: String){
        self.productID = productID
    }

    // Call this when you want to begin a purchase
    // for the productID you gave to the initializer
    public func beginPurchase(){
        // If the user can make payments
        if SKPaymentQueue.canMakePayments(){
            // Create a new request
            let request = SKProductsRequest(productIdentifiers: [productID])
            request.delegate = self
            request.start()
        }
        else{
            // Otherwise, tell the user that
            // they are not authorized to make payments,
            // due to parental controls, etc
        }
    }

    // Call this when you want to restore all purchases
    // regardless of the productID you gave to the initializer
    public func beginRestorePurchases(){
        SKPaymentQueue.default().add(self)
        SKPaymentQueue.default().restoreCompletedTransactions()
    }

    // This is called when a SKProductsRequest receives a response
    public func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse){
        // Let's try to get the first product from the response
        // to the request
        if let product = response.products.first{
            // We were able to get the product! Make a new payment
            // using this product
            let payment = SKPayment(product: product)

            // add the new payment to the queue
            SKPaymentQueue.default().add(self)
            SKPaymentQueue.default().add(payment)
        }
        else{
            // Something went wrong! It is likely that either
            // the user doesn't have internet connection, or
            // your product ID is wrong!
            //
            // Tell the user in requestFailed() by sending an alert,
            // or something of the sort

            RemoveAdsManager.removeAdsFailure()
        }
    }

    // This is called when the user restores their IAP sucessfully
    private func paymentQueueRestoreCompletedTransactionsFinished(_ queue: SKPaymentQueue){
        // For every transaction in the transaction queue...
        for transaction in queue.transactions{
            // If that transaction was restored
            if transaction.transactionState == .restored{
                // get the producted ID from the transaction
                let productID = transaction.payment.productIdentifier

                // In this case, we have only one IAP, so we don't need to check
                // what IAP it is. However, this is useful if you have multiple IAPs!
                // You'll need to figure out which one was restored
                if(productID.lowercased() == IAPManager.removeAdsID.lowercased()){
                    // Restore the user's purchases
                    RemoveAdsManager.restoreRemoveAdsSuccess()
                }

                // finish the payment
                SKPaymentQueue.default().finishTransaction(transaction)
            }
        }
    }

    // This is called when the state of the IAP changes -- from purchasing to purchased, for example.
    // This is where the magic happens :)
    public func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]){
        for transaction in transactions{
            // get the producted ID from the transaction
            let productID = transaction.payment.productIdentifier

            // In this case, we have only one IAP, so we don't need to check
            // what IAP it is.
            // However, if you have multiple IAPs, you'll need to use productID
            // to check what functions you should run here!

            switch transaction.transactionState{
            case .purchasing:
                // if the user is currently purchasing the IAP,
                // we don't need to do anything.
                //
                // You could use this to show the user
                // an activity indicator, or something like that
                break
            case .purchased:
                // the user sucessfully purchased the IAP!
                RemoveAdsManager.removeAdsSuccess()
                SKPaymentQueue.default().finishTransaction(transaction)
            case .restored:
                // the user restored their IAP!
                RemoveAdsManager.restoreRemoveAdsSuccess()
                SKPaymentQueue.default().finishTransaction(transaction)
            case .failed:
                // The transaction failed!
                RemoveAdsManager.removeAdsFailure()
                // finish the transaction
                SKPaymentQueue.default().finishTransaction(transaction)
            case .deferred:
                // This happens when the IAP needs an external action
                // in order to proceeded, like Ask to Buy
                RemoveAdsManager.removeAdsDeferred()
                break
            }
        }
    }

}

最后，您需要为用户添加一些方法来开始购买并调用RemoveAdsManager.removeAds()，并开始恢复并调用RemoveAdsManager.restoreRemoveAds()，就像某个按钮一样!请记住，根据App Store指南，你需要提供一个按钮来恢复购买。

提交审查

最后要做的是将你的IAP提交到App Store Connect进行审查!关于这方面的详细说明，您可以参考我Objective-C回答的最后一部分，在submission For review标题下。

快速用户

Swift用户可以查看我的Swift回答这个问题。或者，看看Yedidya Reiss的答案，它把Objective-C代码翻译成Swift。

objective - c用户

剩下的答案是用Objective-C编写的

App Store Connect

Go to appstoreconnect.apple.com and log in Click My Apps then click the app you want do add the purchase to Click the Features header, and then select In-App Purchases on the left Click the + icon in the middle For this tutorial, we are going to be adding an in-app purchase to remove ads, so choose non-consumable. If you were going to send a physical item to the user, or give them something that they can buy more than once, you would choose consumable. For the reference name, put whatever you want (but make sure you know what it is) For product id put tld.websitename.appname.referencename this will work the best, so for example, you could use com.jojodmo.blix.removeads Choose cleared for sale and then choose price tier as 1 (99¢). Tier 2 would be $1.99, and tier 3 would be $2.99. The full list is available if you click view pricing matrix I recommend you use tier 1, because that's usually the most anyone will ever pay to remove ads. Click the blue add language button, and input the information. This will ALL be shown to the customer, so don't put anything you don't want them seeing For hosting content with Apple choose no You can leave the review notes blank FOR NOW. Skip the screenshot for review FOR NOW, everything we skip we will come back to. Click 'save'

你的产品ID可能需要几个小时才能在App Store Connect上注册，所以要有耐心。

设置项目

现在你已经在App Store Connect上设置了你的应用内购买信息，进入你的Xcode项目，进入应用管理器(方法和头文件顶部的蓝色页面状图标)，在目标下点击你的应用(应该是第一个)，然后进入general。在底部，你应该会看到链接的框架和库，点击小的加号，并添加框架StoreKit.framework。如果你不这样做，应用内购买将无法工作!

如果你使用Objective-C作为你的应用语言，你应该跳过这五个步骤。否则，如果你正在使用Swift，你可以按照我的Swift回答这个问题，在这里，或者，如果你更喜欢使用Objective-C的应用程序内购买代码，但在你的应用程序中使用Swift，你可以做以下事情:

Create a new .h (header) file by going to File > New > File... (Command ⌘ + N). This file will be referred to as "Your .h file" in the rest of the tutorial When prompted, click Create Bridging Header. This will be our bridging header file. If you are not prompted, go to step 3. If you are prompted, skip step 3 and go directly to step 4. Create another .h file named Bridge.h in the main project folder, Then go to the Application Manager (the blue page-like icon), then select your app in the Targets section, and click Build Settings. Find the option that says Swift Compiler - Code Generation, and then set the Objective-C Bridging Header option to Bridge.h In your bridging header file, add the line #import "MyObjectiveCHeaderFile.h", where MyObjectiveCHeaderFile is the name of the header file that you created in step one. So, for example, if you named your header file InAppPurchase.h, you would add the line #import "InAppPurchase.h" to your bridge header file. Create a new Objective-C Methods (.m) file by going to File > New > File... (Command ⌘ + N). Name it the same as the header file you created in step 1. For example, if you called the file in step 1 InAppPurchase.h, you would call this new file InAppPurchase.m. This file will be referred to as "Your .m file" in the rest of the tutorial.

编码

现在我们要进入实际的编码。在.h文件中添加以下代码:

BOOL areAdsRemoved;

- (IBAction)restore;
- (IBAction)tapsRemoveAds;

接下来，您需要将StoreKit框架导入到您的.m文件中，并在@interface声明后添加SKProductsRequestDelegate和SKPaymentTransactionObserver:

#import <StoreKit/StoreKit.h>

//put the name of your view controller in place of MyViewController
@interface MyViewController() <SKProductsRequestDelegate, SKPaymentTransactionObserver>

@end

@implementation MyViewController //the name of your view controller (same as above)
  //the code below will be added here
@end

现在在你的。m文件中添加以下内容，这部分会变得复杂，所以我建议你阅读代码中的注释:

//If you have more than one in-app purchase, you can define both of
//of them here. So, for example, you could define both kRemoveAdsProductIdentifier
//and kBuyCurrencyProductIdentifier with their respective product ids
//
//for this example, we will only use one product

#define kRemoveAdsProductIdentifier @"put your product id (the one that we just made in App Store Connect) in here"

- (IBAction)tapsRemoveAds{
    NSLog(@"User requests to remove ads");

    if([SKPaymentQueue canMakePayments]){
        NSLog(@"User can make payments");
    
        //If you have more than one in-app purchase, and would like
        //to have the user purchase a different product, simply define 
        //another function and replace kRemoveAdsProductIdentifier with 
        //the identifier for the other product

        SKProductsRequest *productsRequest = [[SKProductsRequest alloc] initWithProductIdentifiers:[NSSet setWithObject:kRemoveAdsProductIdentifier]];
        productsRequest.delegate = self;
        [productsRequest start];
    
    }
    else{
        NSLog(@"User cannot make payments due to parental controls");
        //this is called the user cannot make payments, most likely due to parental controls
    }
}

- (void)productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response{
    SKProduct *validProduct = nil;
    int count = [response.products count];
    if(count > 0){
        validProduct = [response.products objectAtIndex:0];
        NSLog(@"Products Available!");
        [self purchase:validProduct];
    }
    else if(!validProduct){
        NSLog(@"No products available");
        //this is called if your product id is not valid, this shouldn't be called unless that happens.
    }
}

- (void)purchase:(SKProduct *)product{
    SKPayment *payment = [SKPayment paymentWithProduct:product];

    [[SKPaymentQueue defaultQueue] addTransactionObserver:self];
    [[SKPaymentQueue defaultQueue] addPayment:payment];
}

- (IBAction) restore{
    //this is called when the user restores purchases, you should hook this up to a button
    [[SKPaymentQueue defaultQueue] addTransactionObserver:self];
    [[SKPaymentQueue defaultQueue] restoreCompletedTransactions];
}

- (void) paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue
{
    NSLog(@"received restored transactions: %i", queue.transactions.count);
    for(SKPaymentTransaction *transaction in queue.transactions){
        if(transaction.transactionState == SKPaymentTransactionStateRestored){
            //called when the user successfully restores a purchase
            NSLog(@"Transaction state -> Restored");

            //if you have more than one in-app purchase product,
            //you restore the correct product for the identifier.
            //For example, you could use
            //if(productID == kRemoveAdsProductIdentifier)
            //to get the product identifier for the
            //restored purchases, you can use
            //
            //NSString *productID = transaction.payment.productIdentifier;
            [self doRemoveAds];
            [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
            break;
        }
    }   
}

- (void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions{
    for(SKPaymentTransaction *transaction in transactions){
        //if you have multiple in app purchases in your app,
        //you can get the product identifier of this transaction
        //by using transaction.payment.productIdentifier
        //
        //then, check the identifier against the product IDs
        //that you have defined to check which product the user
        //just purchased            

        switch(transaction.transactionState){
            case SKPaymentTransactionStatePurchasing: NSLog(@"Transaction state -> Purchasing");
                //called when the user is in the process of purchasing, do not add any of your own code here.
                break;
            case SKPaymentTransactionStatePurchased:
            //this is called when the user has successfully purchased the package (Cha-Ching!)
                [self doRemoveAds]; //you can add your code for what you want to happen when the user buys the purchase here, for this tutorial we use removing ads
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                NSLog(@"Transaction state -> Purchased");
                break;
            case SKPaymentTransactionStateRestored:
                NSLog(@"Transaction state -> Restored");
                //add the same code as you did from SKPaymentTransactionStatePurchased here
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                break;
            case SKPaymentTransactionStateFailed:
                //called when the transaction does not finish
                if(transaction.error.code == SKErrorPaymentCancelled){
                    NSLog(@"Transaction state -> Cancelled");
                    //the user cancelled the payment ;(
                }
                [[SKPaymentQueue defaultQueue] finishTransaction:transaction];
                break;
        }
    }
}

现在你想为用户完成交易时发生的事情添加你的代码，在本教程中，我们使用删除添加，你必须为横幅视图加载时发生的事情添加你自己的代码。

- (void)doRemoveAds{
    ADBannerView *banner;
    [banner setAlpha:0];
    areAdsRemoved = YES;
    removeAdsButton.hidden = YES;
    removeAdsButton.enabled = NO;
    [[NSUserDefaults standardUserDefaults] setBool:areAdsRemoved forKey:@"areAdsRemoved"];
    //use NSUserDefaults so that you can load whether or not they bought it
    //it would be better to use KeyChain access, or something more secure
    //to store the user data, because NSUserDefaults can be changed.
    //You're average downloader won't be able to change it very easily, but
    //it's still best to use something more secure than NSUserDefaults.
    //For the purpose of this tutorial, though, we're going to use NSUserDefaults
    [[NSUserDefaults standardUserDefaults] synchronize];
}

如果你的应用程序中没有广告，你可以使用任何你想要的东西。例如，我们可以将背景颜色设置为蓝色。要做到这一点，我们需要使用:

- (void)doRemoveAds{
    [self.view setBackgroundColor:[UIColor blueColor]];
    areAdsRemoved = YES
    //set the bool for whether or not they purchased it to YES, you could use your own boolean here, but you would have to declare it in your .h file

    [[NSUserDefaults standardUserDefaults] setBool:areAdsRemoved forKey:@"areAdsRemoved"];
    //use NSUserDefaults so that you can load wether or not they bought it
    [[NSUserDefaults standardUserDefaults] synchronize];
}

现在，在你的viewDidLoad方法的某个地方，你会想要添加以下代码:

areAdsRemoved = [[NSUserDefaults standardUserDefaults] boolForKey:@"areAdsRemoved"];
[[NSUserDefaults standardUserDefaults] synchronize];
//this will load wether or not they bought the in-app purchase

if(areAdsRemoved){
    [self.view setBackgroundColor:[UIColor blueColor]];
    //if they did buy it, set the background to blue, if your using the code above to set the background to blue, if your removing ads, your going to have to make your own code here
}

现在您已经添加了所有代码，进入.xib或storyboard文件，并添加两个按钮，一个表示购买，另一个表示恢复。将tapsRemoveAds IBAction连接到刚刚创建的购买按钮，将restore IBAction连接到恢复按钮。还原操作将检查用户之前是否购买了应用内购买，如果他们还没有购买，则免费为他们提供应用内购买。

提交审查

Next, go into App Store Connect, and click Users and Access then click the Sandbox Testers header, and then click the + symbol on the left where it says Testers. You can just put in random things for the first and last name, and the e-mail does not have to be real - you just have to be able to remember it. Put in a password (which you will have to remember) and fill in the rest of the info. I would recommend that you make the Date of Birth a date that would make the user 18 or older. App Store Territory HAS to be in the correct country. Next, log out of your existing iTunes account (you can log back in after this tutorial).

Now, run your application on your iOS device, if you try running it on the simulator, the purchase will always error, you HAVE TO run it on your iOS device. Once the app is running, tap the purchase button. When you are prompted to log into your iTunes account, log in as the test user that we just created. Next,when it asks you to confirm the purchase of 99¢ or whatever you set the price tier too, TAKE A SCREEN SNAPSHOT OF IT this is what your going to use for your screenshot for review on App Store Connect. Now cancel the payment.

现在，进入应用商店连接，然后进入我的应用程序>你有应用程序内购买>应用程序内购买。然后点击你的应用内购买，点击应用内购买详情下的编辑。一旦你完成了这些，将你刚刚在iPhone上拍摄的照片导入到你的电脑中，并将其作为屏幕截图上传以供审查，然后，在审查笔记中输入你的TEST USER电子邮件和密码。这将有助于苹果在审查过程中。

After you have done this, go back onto the application on your iOS device, still logged in as the test user account, and click the purchase button. This time, confirm the payment Don't worry, this will NOT charge your account ANY money, test user accounts get all in-app purchases for free After you have confirmed the payment, make sure that what happens when the user buys your product actually happens. If it doesn't, then thats going to be an error with your doRemoveAds method. Again, I recommend using changing the background to blue for testing the in-app purchase, this should not be your actual in-app purchase though. If everything works and you're good to go! Just make sure to include the in-app purchase in your new binary when you upload it to App Store Connect!

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以下是一些常见错误:

登录:没有可用的产品

这可能意味着四件事:

你没有在代码中放入正确的应用内购买ID(上面代码中的标识符kRemoveAdsProductIdentifier) 你没有在App Store Connect上清除你的应用内购买 你没有等待应用内购买ID在App Store Connect中注册。在创建ID后等待几个小时，您的问题就应该得到解决了。 您没有完成协议、税务和银行信息的填写。

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如果第一次没有成功，不要沮丧!不要放弃!我花了大约5个小时才让它工作，然后又花了大约10个小时寻找正确的代码!如果您准确地使用上面的代码，它应该可以正常工作。如果你有任何问题，请随时发表意见。