fatal error: unexpectedly found nil while unwrapping an Optional value in swift(SKProduct)

Question

import UIKit
import SpriteKit
import StoreKit

extension SKProduct {
func localizedPrice() -> String {
    let formatter = NSNumberFormatter()
    formatter.numberStyle = .CurrencyStyle
    formatter.locale = self.priceLocale
    return formatter.stringFromNumber(self.price)!
}
}


class BuyCoin: SKScene {

var coin200a = SKProduct()

override func didMoveToView(view: SKView) {
NSLog("The price of this product is \(coin200a.localizedPrice())")
}
}

What am I doing wrong? PS: I am trying to get the local price of an in-app purchase product.

Answer 1

From DOCS price of SKProduct might be nil in case if SKProduct was not configured properly.

var price: NSDecimalNumber! { get } // suppose crash happens here

API demands from user to configure SKProduct with all proper values otherwise it will crash when you try to unwrap price that actually is nil

---

For testing:

I would write something like:

if self.price != nil{ // we don't unwrap price (fetch optional)
   return formatter.stringFromNumber(self.price!)!
} 
else{
  return ""
}