Question

我使用此代码创建我的应用内购买：

import UIKit
import StoreKit

class ViewController: UIViewController, SKProductsRequestDelegate, SKPaymentTransactionObserver, SKStoreProductViewControllerDelegate {

var product_id: String?
@IBOutlet weak var buyButton: UIButton!

override func viewDidLoad() {
    super.viewDidLoad()

    product_id = "product_id"

    SKPaymentQueue.default().add(self)
}

 @IBAction func unlockAction(sender: AnyObject) {

    print("About to fetch the product...")

    // Can make payments
    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("Fetching Products");
    }else{
        print("Can't make purchases");
    }

}

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

    SKPaymentQueue.default().add(payment);

}

func productsRequest (_ request: SKProductsRequest, didReceive 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) {
            buyProduct(product: validProduct);

        } else {
            print(validProduct.productIdentifier)
        }
    } else {
        print("nothing")
    }
}

但是，如果我点击按钮（unlockAction）两次或点击一次，移动到不同的控制器，返回并再次点击我的应用程序在此行崩溃：

SKPaymentQueue.default().add(payment);

错误(lldb)

如何解决？

Answer 1

您必须在结算控制器中使用viewWillDissappear()功能。试试那个。

override func viewWillDisappear(_ animated: Bool) {
    SKPaymentQueue.default().remove(self)
}

我也遇到了这个问题，这已经解决了我的问题。

错误是代码中的SKPaymentQueue.default().add(payment)行。所以尝试这个解决方案，成为可靠的高效程序员。 快乐编码

应用程序因应用内购买错误而崩溃

1 个答案: