'Unexpectedly found nil while unwrapping an Optional value' Swift

Question

toggle.setValue(NSNumber(value: Int(xOr[0])! as Int), forKey: "tag")

results in

Fatal error: Unexpectedly found nil while unwrapping an Optional value.

Unrelated but never bridge cast a type to the same type. `Int(...)! as Int` is pretty nonsensical. — vadian, Oct 15 '20 at 06:54

score 0 · Accepted Answer · answered Oct 15 '20 at 06:16

The element in xOr at index 0 is either not present (if it is a dictionary) or nil (if it is an array).

You should add a check before the element:

if xOr.count > 0, let value = xOr[0] as? Int // Maybe remove the count, I don't know whether this is an array or a dictionary. If it is an array, keep the check, if it is a dictionary, keep it.
{
  toggle.setValue(NSNumber(value: value), forKey: "tag")
}

Also, Int(xOr[0])! already (forcefully) unwraps the value, so you do not need an additional cast to 'Int'.

'Unexpectedly found nil while unwrapping an Optional value' Swift

1 Answers1