SKPaymentQueue.canMakePayments() always returns true - ios

Question

It is important to check are In-App Purchases enabled to block UI properly, RayWenderlich blog says:
Apple requires that you handle this situation gracefully; not doing so will likely result in an app rejection.
When you disable In-App Purchase, the Restrictions SKPaymentQueue.canMakePayments() should return false but it always returns true no matter what. I tried with 2 different projects, including, this one from RayWenderlich.
I tested this only with iOS 9.
How to recognise that In-App Purchases disabled with parental restrictions?
Update.
Somebody requested to share my code. I don't think it is necessary, the code is obvious and doesn't have errors. I can reproduce this problems with the Ray's project too.
// This function is called in from viewDidLoad()
// And after SKProduct is updated.
func addTextFromProduct(p: SKProduct) {
if let title = p.localizedTitle as String? {
self.navigationBar.topItem?.title = title
}
if let description = p.localizedDescription as String? {
if dailyLimit {
self.informationLabel.text? = "\(waitingTime)\(description)"
} else {
self.informationLabel.text? = "\(description)"
}
if SKPaymentQueue.canMakePayments() {
unblockButtons()
}
} else {
self.informationLabel.text? = "\(waitingTime)\(description)\n\nIn-App Purchase is unavailable at this moment."
blockButtons()
}
if SKPaymentQueue.canMakePayments() {
self.priceFormatter.locale = p.priceLocale
let localPrice: String! = self.priceFormatter.stringFromNumber(p.price)
let label = "\(localPrice)"
self.buyButton.setTitle(label, forState: UIControlState.Normal)
} else {
blockButtons()
buyButton.setTitle("Not Available", forState: UIControlState.Disabled)
}
}

Answer 1

You need to check in your viewDidLoad method if the user has enabled IAP.
if(SKPaymentQueue.canMakePayments()) {
print("IAP is enabled, loading")
// Your Products
let request: SKProductsRequest = SKProductsRequest(productIdentifiers: productID as! Set<String>)
request.delegate = self
request.start()
}
else {
print("IAP not allowed")
//Do something like show an alert, the user has not allowed in app purchases
}