ios - How do I add multiple in app purchases in Swift Spritekit? -


i have in app purchase unlock level 2 , works how add in app purchase unlock level 3? have make new functions , add code level3? im not sure how this. thanks!

    func unlocklevel() {     if skpaymentqueue.canmakepayments() {         var productid:nsset = nsset(object: "unlockleveltwo")         var productsrequest:skproductsrequest = skproductsrequest(productidentifiers: productid set<nsobject>)         productsrequest.delegate = self         productsrequest.start()         println("fetching products...")     }     else {         println("can't make purchases")     } }  func buyproduct(product: skproduct) {     println("sending payment request apple");     var payment = skpayment(product: product)     skpaymentqueue.defaultqueue().addpayment(payment); }  func productsrequest(request: skproductsrequest!, didreceiveresponse response: skproductsresponse!) {     var count : int = response.products.count     if (count>0) {         var validproducts = response.products         var validproduct: skproduct = response.products[0] as! skproduct         if (validproduct.productidentifier == "unlockleveltwo") {             println(validproduct.localizedtitle)             println(validproduct.localizeddescription)             println(validproduct.price)             buyproduct(validproduct);         }         else {             println(validproduct.productidentifier)         }     }     else {         println("nothing")     } }  func request(request: skrequest!, didfailwitherror error: nserror!) {     println("error fetching product info") }  func restorepurchases() {     skpaymentqueue.defaultqueue().restorecompletedtransactions()   }  func paymentqueuerestorecompletedtransactionsfinished(queue: skpaymentqueue!) {      item in queue.transactions {         if let transaction = item as? skpaymenttransaction {             if transaction.transactionstate == .restored {                 unlocklevel()                 skpaymentqueue.defaultqueue().finishtransaction(transaction)                 break             }         }     }     if queue.transactions.count == 0 {         println("not restored")         displayrestorealert()     } }  func displayrestorealert() {      let alertcontroller = uialertcontroller(title: "level 2 has not been purchased on account.", message: nil, preferredstyle: .alert)     let okaction = uialertaction(title: "ok", style: .default, handler: nil)     alertcontroller.addaction(okaction)     self.viewcontroller.presentviewcontroller(alertcontroller, animated: true, completion: nil)  }    func paymentqueue(queue: skpaymentqueue!, updatedtransactions transactions: [anyobject]!) {     println("received payment transaction response apple");      transaction:anyobject in transactions {         if let trans:skpaymenttransaction = transaction as? skpaymenttransaction{             switch trans.transactionstate {             case .purchased:                 println("product purchased");                 skpaymentqueue.defaultqueue().finishtransaction(transaction as! skpaymenttransaction)                 nsuserdefaults().setbool(true, forkey: "leavel2")                 unlockleveltwo()                 break;             case .failed:                 println("purchased failed");                 skpaymentqueue.defaultqueue().finishtransaction(transaction as! skpaymenttransaction)                 break;             case .restored:                 println("already purchased");                 skpaymentqueue.defaultqueue().restorecompletedtransactions()              default:                 break;             }         }     } }


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