應用內購買和還原按鈕：單一產品-非消耗品

Question

這個問題使我走了好幾天。

我有一個簡單的應用程序，可以顯示橫幅和插頁式廣告。

我正在使用單個視圖應用程序，具有主視圖控制器（ ViewController.swift ），並設置了另一個視圖控制器（ InAppViewController.swift ）來處理一個彈出頁面，該彈出頁面包括：

1. 允許用戶進行應用內購買以刪除所有廣告（AdBanners和InterstitialAds）； 要么
2. 恢復購買。

我的代碼運行時沒有錯誤。

應用內購買運行正常，但偶爾我會兩次收到iTunes登錄請求。

但是我的還原按鈕和相關功能似乎是問題所在。

我已經設置了許多沙箱測試器帳戶進行測試，並且尚未購買該應用程序的新用戶能夠成功恢復購買。 這不可能，所以我在這里肯定做錯了。

這是我的代碼：

主視圖控制器：

//  ViewController.swift

import UIKit
import MessageUI
import Social
import iAd
import StoreKit

class ViewController: UIViewController, MFMailComposeViewControllerDelegate, MFMessageComposeViewControllerDelegate, ADBannerViewDelegate, ADInterstitialAdDelegate
{

let defaults = NSUserDefaults.standardUserDefaults()
var product_id: NSString?;

override func viewDidLoad() {
    product_id = "some.product.id";
    super.viewDidLoad()

     //Check if product is purchased
     if (defaults.boolForKey("purchased")){
        print("already purchased")

        // Hide or show banner ads is purchased/not purchased.
        // Advertising Banner:
        self.canDisplayBannerAds = false
        }

    else if (!defaults.boolForKey("stonerPurchased")){
        print("not yet purchased")

        // Advertising Banner:
        self.canDisplayBannerAds = true
        }

此代碼似乎完美地工作。 應用加載后，可以確定誰付費刪除了廣告，哪些還沒有付費，並顯示了適當的廣告橫幅。

我在第二個視圖控制器（ InAppPViewController.swift ）中遇到了問題。

這是我的代碼：

第二個視圖控制器-InAppViewController.swift：

//  InAppPViewController.swift

import UIKit
import StoreKit
import iAd

class InAppPViewController: UIViewController, SKProductsRequestDelegate, SKPaymentTransactionObserver {

let defaults = NSUserDefaults.standardUserDefaults()
var product_id: NSString?;


@IBOutlet weak var unlockAction: UIButton!
@IBOutlet var adBannerView: ADBannerView?

override func viewDidLoad() {
     super.viewDidLoad()

    // Do any additional setup after loading the view.
    }

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

  @IBAction func restorePurchases(sender: UIButton) {
    SKPaymentQueue.defaultQueue().addTransactionObserver(self)
    SKPaymentQueue.defaultQueue().restoreCompletedTransactions()

}
  func paymentQueueRestoreCompletedTransactionsFinished(queue: SKPaymentQueue) {

    print("Transactions Restored")
    let alert = UIAlertView(title: "Thank You", message: "Your purchase(s) were restored.", delegate: nil, cancelButtonTitle: "OK")
    alert.show()
}


@IBAction func unlockAction(sender: AnyObject) {

product_id = "some.product.id";

    SKPaymentQueue.defaultQueue().addTransactionObserver(self)

    //Check if product is purchased

    if (defaults.boolForKey("purchased")){

    }
    else if (!defaults.boolForKey("stonerPurchased")){
        print("false")     
    }


    print("About to fetch the products");
    // We check that we are allowed to make the purchase.

    if (SKPaymentQueue.canMakePayments())
    {
        let productID:NSSet = NSSet(object: self.product_id!);
        let productsRequest:SKProductsRequest = SKProductsRequest(productIdentifiers: productID as! Set<String>);
        productsRequest.delegate = self;
        productsRequest.start();
        print("Fething Products");
    }else{
        print("can't make purchases");
    }

}

func buyProduct(product: SKProduct){
    print("Sending the Payment Request to Apple");
    let payment = SKPayment(product: product)
    SKPaymentQueue.defaultQueue().addPayment(payment);

}
//Delegate Methods for IAP

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

    let count : Int = response.products.count
    if (count>0) {

        let validProduct: SKProduct = response.products[0] as SKProduct
        if (validProduct.productIdentifier == self.product_id) {
            print(validProduct.localizedTitle)
            print(validProduct.localizedDescription)
            print(validProduct.price)
            buyProduct(validProduct);
        } else {
            print(validProduct.productIdentifier)
        }
    } else {
        print("nothing")
    }
}


func request(request: SKRequest, didFailWithError error: NSError) {
    print("Error Fetching product information");
}

func paymentQueue(queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction])   {
    print("Received Payment Transaction Response from Apple");

    for transaction:AnyObject in transactions {
        if let trans:SKPaymentTransaction = transaction as? SKPaymentTransaction{
            switch trans.transactionState {

            case .Purchased:
                print("Product Purchased");
                SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)
                defaults.setBool(true , forKey: "purchased")
                break;

            case .Failed:
                print("Purchased Failed");
                SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)
                break;

            case .Restored:
                print("Already Purchased");
                SKPaymentQueue.defaultQueue().restoreCompletedTransactions()


            default:
                break;
            }
        }
    }

}

}

我要去哪里錯了？

問題：

1. 我上面的代碼正確嗎？
2. 我應該修改什么，為什么？

提前致歉，對於這個美好的編碼世界，我還是陌生的……但是喜歡它的每一分鍾！

Answer 1

1. SKPaymentQueue.defaultQueue().addTransactionObserver(self)應該在viewDidLoad()而不是在還原功能中
2. 您可以將SKPaymentQueue.defaultQueue().restoreCompletedTransactions()像這樣override func viewWillDisappear(animated: Bool) { SKPaymentQueue.defaultQueue().removeTransactionObserver(self) }
3. 在沙箱中登錄兩次是正常的。

希望我能有所幫助。

Answer 2

我已經將InAppPViewController.swift文件的代碼修改如下：

//  InAppPViewController.swift

import UIKit
import StoreKit

class InAppPViewController: UIViewController, SKProductsRequestDelegate, SKPaymentTransactionObserver {

let defaults = NSUserDefaults.standardUserDefaults()
var product_id: NSString?;

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.  
}

override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()
    // Dispose of any resources that can be recreated.
}

@IBAction func restorePurchases(sender: UIButton) {
    // Set up the observer
    SKPaymentQueue.defaultQueue().addTransactionObserver(self)


    //Check if user can make payments and then proceed to restore purchase
    if (SKPaymentQueue.canMakePayments()) {
        SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
    }

}

@IBAction func unlockAction(sender: AnyObject) {

    product_id = "some.product.id";
    // Adding the observer
    SKPaymentQueue.defaultQueue().addTransactionObserver(self)

    //Check if product is purchased
    if (defaults.boolForKey("purchased")){
        print("User already purchased this")
        // Hide a view or show content depends on your requirement
    }

    else if (!defaults.boolForKey("Purchased")){
        print("User has not yet pur hased this") 
    }


    print("About to fetch the products");

    // Check if user can make payments and then proceed to make the purchase.
    if (SKPaymentQueue.canMakePayments())
    {
        let productID:NSSet = NSSet(object: self.product_id!);
        let productsRequest:SKProductsRequest = SKProductsRequest(productIdentifiers: productID as! Set<String>);
        productsRequest.delegate = self;
        productsRequest.start();
        print("User can make purchases and will fetch products from Apple Store now");
    }else{
        print("User can't make purchases");
    }

}

func buyProduct(product: SKProduct){
    print("Sending the Payment Request to Apple");
    let payment = SKPayment(product: product)
    SKPaymentQueue.defaultQueue().addPayment(payment);

}

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

    let count : Int = response.products.count
    if (count>0) {

        let validProduct: SKProduct = response.products[0] as SKProduct
        if (validProduct.productIdentifier == self.product_id) {
            print(validProduct.localizedTitle)
            print(validProduct.localizedDescription)
            print(validProduct.price)
            buyProduct(validProduct);
        } else {
            print(validProduct.productIdentifier)
        }
    } else {
        print("nothing")
    }
}


func request(request: SKRequest, didFailWithError error: NSError) {
    print("Error Fetching product information");
}

// Allowing for all possible outcomes:
func paymentQueue(queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction])   {
    print("Received Payment Transaction Response from Apple");

    for transaction:AnyObject in transactions {
        if let trans:SKPaymentTransaction = transaction as? SKPaymentTransaction {
            switch trans.transactionState {

            case .Purchased:
                print("Product Purchased")
                let alert = UIAlertView(title: "Thank You", message: "Thank you for your purchase!", delegate: nil, cancelButtonTitle: "OK")
                alert.show();
                SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)
                defaults.setBool(true , forKey: "purchased")
                break;

            case .Failed:
                print("Purchased Failed");
                SKPaymentQueue.defaultQueue().finishTransaction(transaction as! SKPaymentTransaction)
                break;

            case .Restored:
                print("Already Purchased");
                SKPaymentQueue.defaultQueue().restoreCompletedTransactions()
                break;

            default:
                break;
            }
        }
    }

}

}

我離開了ViewController.swift文件。

購買產品似乎現在可以正常工作。

但是，對於“還原購買”，我可以在物理設備上運行代碼，但是無法測試“還原購買”功能。

我發現以前尚未解決的還原購買仍在系統中循環。 我無法手動清除我的SKPaymentsQueue。 因此，我的代碼拒絕接受新的“還原購買”請求。