Swift IOS 9 – 以最简单的方式实现应用内购买

首先,在Itunes Connect中进行IAP

导入Storekit

import StoreKit

添加StoreKit代理

class ViewController: UIViewController,SKProductsrequestDelegate,SKPaymenttransactionObserver {

声明您的产品ID

var product_id: NSString?

override func viewDidLoad() {


    product_id = "YOUR_PRODUCT_ID"
    super.viewDidLoad()
    SKPaymentQueue.defaultQueue().addtransactionObserver(self)

   //check if product is purchased
   if (NSUserDefaults.standardUserDefaults().boolForKey("purchased")){

       // Hide ads
       adView.hidden = true

   } else {
       print("Should show ads...")

   }

}

解锁内容：这是按钮操作,将初始化购买

@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);
        productsrequest.delegate = self;
        productsrequest.start();
        println("Fetching Products");
    }else{
        print("Can't make purchases");
    }

}

助手方法

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

 }

IAP的代表方法

func productsrequest (request: SKProductsrequest,didReceiveResponse response: SKProductsResponsE) {

    let count : Int = response.products.count
    if (count>0) {
        var 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)
                // Handle the purchase
                NSUserDefaults.standardUserDefaults().setBool(true,forKey: "purchased")
                adView.hidden = true
                break;
            case .Failed:
                print("Purchased Failed");
                SKPaymentQueue.defaultQueue().finishtransaction(transaction as SKPaymenttransaction)
                break;



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


                 // Handle the purchase
                    NSUserDefaults.standardUserDefaults().setBool(true,forKey: "purchased")
                    adView.hidden = true
                    break;
            default:
                break;
            }
        }
    }

}

恢复购买

将此添加到函数：

if (SKPaymentQueue.canMakePayments()) {
  SKPaymentQueue.defaultQueue().restoreCompletedtransactions()
}