swift - 应用程序内购买在 Swift 2 中有效，但现在我已更新到 Swift 3 和 Xcode 8

Question

正如标题所示，我有一个应用内购买代码，用于删除在 Swift 2 中运行的广告，然后更新到 Swift 3 并更新了代码。它会向 Apple 发送付款请求，但不会运行在 func buyProduct() 中调用的 func paymentQueue(_queue: SKPaymentQueue, UpdatedTransactions transactions: [SKPaymentTransaction]) 。代码如下:

//  MainScene.swift
//  Contain
//
//  Created by Phil Javinsky III on 9/16/16.
//  Copyright © 2016 Phil Javinsky III. All rights reserved.
//

import SpriteKit
import StoreKit

let defaults = UserDefaults.standard
var noAds: Bool = false
var fetched: Bool = false
var product = SKProduct()
var productID = "containRemoveAds"
var readyForIAP: Bool = false

class MainScene: SKScene, SKProductsRequestDelegate, SKPaymentTransactionObserver {
    var touchLocation: CGPoint = CGPoint.zero
    var start, leaderboards, rate, removeAds: SKSpriteNode!

override func didMove(to view: SKView) {
    SKPaymentQueue.default().add(self)
    if defaults.bool(forKey: "purchased") {
        print("Already purchased")
        bannerAd.isHidden = true
        noAds = true
    }
    else {
        print("Not purchased")
        if !fetched {
            print("Fetching")
            getProductInfo()
            fetched = true
        }
    }

    start = self.childNode(withName: "start") as! SKSpriteNode
    leaderboards = self.childNode(withName: "leaderboards") as! SKSpriteNode
    leaderboards.position = CGPoint(x: 0, y: -1150)
    rate = self.childNode(withName: "rate") as! SKSpriteNode
    rate.position = CGPoint(x: 0, y: -1350)
    removeAds = self.childNode(withName: "removeAds") as! SKSpriteNode
    removeAds.position = CGPoint(x: 0, y: -1550)

    SKPaymentQueue.default().remove(self)
}

override func touchesEnded(_ touches: Set<UITouch>, with event: UIEvent?) {
    touchLocation = touches.first!.location(in: self)

    if start.contains(touchLocation) {
        let game: GameScene = GameScene(fileNamed: "GameScene")!
        game.scaleMode = .aspectFit //.resizeFill?
        view?.presentScene(game, transition: SKTransition.fade(withDuration: 1))
    }
    else if leaderboards.contains(touchLocation) {
        //showLeaderboard()
    }
    else if rate.contains(touchLocation) {
        /*let url = NSURL(string: "itms-apps://itunes.apple.com/us/app/whack-a-diglett/id1141187647?ls=1&mt=8")

        if UIApplication.shared.canOpenURL(url! as URL) {
            UIApplication.shared.openURL(url! as URL)
        }*/
    }
    else if removeAds.contains(touchLocation) {
        let alert = UIAlertController.init(title: "Remove Ads", message: "Remove ads or restore a previous purchase.", preferredStyle: .actionSheet)
        alert.addAction(UIAlertAction(title: "Remove Ads", style: .default, handler:
            { action -> Void in
                print("Remove Ads")
                if readyForIAP {
                    self.buyProduct()
                }
                else {
                    print("Not ready for IAP")
                    let alert = UIAlertController.init(title: "Error", message: "Something went wrong, try again.", preferredStyle: .alert)
                    alert.addAction(UIAlertAction(title: "Close", style: .cancel, handler: nil))
                    self.view?.window?.rootViewController?.present(alert, animated: true, completion: nil)
                }
            }))
        alert.addAction(UIAlertAction(title: "Restore Purchase", style: .default, handler:
            { action -> Void in
                print("Restore purchase")
                if (SKPaymentQueue.canMakePayments()) {
                    SKPaymentQueue.default().restoreCompletedTransactions()
                }
            }))
        alert.addAction(UIAlertAction(title: "Cancel", style: .cancel, handler: nil))
        self.view?.window?.rootViewController?.present(alert, animated: true, completion: nil)

    }
}

func getProductInfo() {
    //print("About to fetch the products")

    // Check if allowed to make the purchase
    if SKPaymentQueue.canMakePayments() {
        let productIdentifier: NSSet = NSSet(object: productID)
        let productsRequest: SKProductsRequest = SKProductsRequest(productIdentifiers: productIdentifier as! Set<String>)
        productsRequest.delegate = self
        productsRequest.start()
        //print("Fetching Products")
    }
    else {
        print("can't make purchases")
    }
}

func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
    var products = response.products
    if (products.count != 0) {
        product = products[0]
        print(product.localizedTitle)
        print(product.localizedDescription)
        print(product.price)
        readyForIAP = true
        print("Ready for IAP")
    }
    else {
        print("Product not found")
    }
}

func buyProduct() {
    print("Sending payment request to Apple")
    let payment = SKPayment(product: product)
    SKPaymentQueue.default().add(payment as SKPayment)
}

func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
    print("Received payment transaction response from Apple")
    for transaction in transactions {
        switch transaction.transactionState {
        case .purchased:
            print("Product Purchased")
            defaults.set(true, forKey: "purchased")
            bannerAd.isHidden = true
            noAds = true
            SKPaymentQueue.default().finishTransaction(transaction)
        case .failed:
            print("Purchased Failed")
            SKPaymentQueue.default().finishTransaction(transaction)
        case .restored:
            print("Restored")
            let alert: UIAlertController = UIAlertController(title: "Restored", message: "Purchase restored, ads removed.", preferredStyle: .alert)
            alert.addAction(UIAlertAction(title: "Close", style: .cancel, handler: nil))
            self.view?.window?.rootViewController?.present(alert, animated: true, completion: nil)
            defaults.set(true, forKey: "purchased")
            bannerAd.isHidden = true
            noAds = true
            SKPaymentQueue.default().finishTransaction(transaction)
        default:
            print("DEFAULT")
            break
        }
    }
}

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

}

Answer 1

为什么要删除 didMoveToView 中的事务观察器？这没有任何意义。

在didMoveToView中添加事务观察器

 SKPaymentQueue.default().add(self)

并且仅在您的应用关闭时将其删除。

也许将 IAP 代码移动到另一个帮助器类或其他类中也是一个好主意，这样你的代码很难阅读。

希望这有帮助