Swift convert Any to String and assign to UIlabel (Fatal error: Unexpectedly found nil while unwrapping an Optional value)

Question

I have this Dictionary

var detailItem: Dictionary?

I am trying to get the Any and convert it to a String and then assign to UILabel like so:

self.firstName.text = detail!["firstname"] as? String

Fatal error: Unexpectedly found nil while unwrapping an Optional value

Which I dont understand because first name is not nil, its James (not "James") but just James, if I print it I can see it:

print(detail!["firstname"])

What am I doing wrong?

How to do I assign Any to UiLabel text?

Maybe the problem is that `self.firstName` is nil. Is `firstName` an outlet? Are you sure it is connected? — rmaddy, Nov 10 '17 at 19:24
@rmaddy This is clearly the issue here. You should post this as an answer :) — CodingMeSwiftly, Nov 10 '17 at 19:27
I tried self.firstName.text = "HI" and yes I get the same error — user979331, Nov 10 '17 at 19:32
No, it's not connected. If it was connected you wouldn't get the error (assuming the error really happens on the `self.firstName.text = "Hi"` line). — rmaddy, Nov 10 '17 at 19:34
What part of the view controller code (which function) are you assigning the value to the outlet in? — Santhosh R, Nov 10 '17 at 19:46

naturaln0va · Accepted Answer · 2017-11-10T19:46:35.197

1

The safest way to do this is to unwrap the optional string value from your dictionary.

if let firstName = detail?["firstname"] as? String {
    self.firstName?.text = firstName
}

This ensures your label's text will only get set when there is a value for "firstname" in your Dictionary.

If that still crashes then your label might be nil. If your using an outlet it might not be set.

edited Nov 10 '17 at 19:46

answered Nov 10 '17 at 19:26

naturaln0va

It crashes, yes I am using an outlet – user979331 Nov 10 '17 at 19:30
1

Your outlet must be broken then. Try the updated answer. It shouldn't crash, but since the outlet isn't working you would see the text in the label. – naturaln0va Nov 10 '17 at 19:46

1 Answers1