我不断收到一条错误消息（类型StoreViewController不符合协议SKPaymentTransactionObserver）我已经多次查看代码。也许我需要一套新的眼光，或者编码实际上有问题——我觉得更有可能。
我不得不在代码末尾添加一些右大括号，以将错误数量减少到一个。但在那之后，如果我尝试，它会再次上升。因此，它可能不是花括号问题。
请帮助我解决问题，或者找到我的错误。(Xcode 9.3)
import UIKit
import StoreKit
class StoreViewController: UIViewController , SKPaymentTransactionObserver , SKProductsRequestDelegate {
@IBOutlet weak var storeLabel: UILabel!
@IBOutlet weak var infoLabel: UILabel!
@IBOutlet weak var buyButton: UIButton!
@IBOutlet weak var cancelButton: UIButton!
var product: SKProduct?
var productID = "com.Haleemani.SilkyDragon.removeads"
override func viewDidLoad() {
super.viewDidLoad()
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
@IBAction func dimissView(_ sender: Any) {
dismiss(animated: true, completion: nil)
}
@IBAction func purchase(_ sender: Any) {
let payment = SKPayment(product: product!)
SKPaymentQueue.default().add(payment)
}
func getPurchaseInfo() {
if SKPaymentQueue.canMakePayments() {
let request = SKProductsRequest(productIdentifiers: NSSet(objects: self.productID) as! Set<String>)
request.delegate = self
request.start()
} else {
storeLabel.text = "Unsuccessful"
infoLabel.text = "Check your settings and try again"
}
}
func productsRequest(_ request: SKProductsRequest, didReceive response: SKProductsResponse) {
var products = response.products
if (products.count == 0) {
storeLabel.text = "Unsuccessful"
infoLabel.text = "Cheack your settings and try again"
} else {
product = products [0]
storeLabel.text = product!.localizedTitle
infoLabel.text = product!.localizedDescription
buyButton.isEnabled = true
let invalids = response.invalidProductIdentifiers
for product in invalids {
print ("product not found: \(product)")
}
}
}
func paymentQueue(_ queue: SKPaymentQueue, updatedTransactions transactions: [SKPaymentTransaction]) {
for transaction in transactions {
switch transaction.transactionState {
case SKPaymentTransactionState.purchased:
SKPaymentQueue.default().finishTransaction(transaction)
storeLabel.text = "Thank You"
infoLabel.text = "You have removed Watermark in all your images Forever"
buyButton.isEnabled = false
case SKPaymentTransactionState.failed:
SKPaymentQueue.default().finishTransaction(transaction)
storeLabel.text = "Thank You"
infoLabel.text = "You have removed Watermark in all your images Forever"
default:
break
}
}
}
}
}