fatal error: unexpectedly found nil while unwrapping an Optional value

Question

fatal error: unexpectedly found nil while unwrapping an Optional value

Asked 7 years, 2 months ago

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I know the problem is simple. but I can’t seem to solve it my variable Beats only appears in the second view, but a function ends up calling it in the first view, I just need to check if she’s showing up, but I’m not getting to do the control if

@IBOutlet weak var Batimentos: UILabel!


if let actualBpm = bpm{
            print(actualBpm)

            Batimentos.text! = "\(actualBpm)"

        }else {
            print("ELSE bpm")
        }

If you are assigning a value to the label "Beats", there is no need to force unwrap. Maybe that’s the problem, because possibly at the time of attribution the text is nil and you’re forcing...

– Andreza Cristina da Silva

2017/09/21 at 21:56

2 answers

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by Raphael Freschi • 1 point · Answer 1 · 2017-10-04T19:39:02+00:00

Try it that way.

@IBOutlet weak var Batimentos: UILabel!


if let actualBpm = bpm{
    print(actualBpm)

    Batimentos.text! = "\(actualBpm!)"

}else {
    print("ELSE bpm")
}

by fabcarvalhal • 1 point · Answer 2 · 2019-06-27T22:09:19+00:00

The force unwrap in the text attribute is unnecessary as you are assigning a value. Try so, removing the unwrap force:

@IBOutlet weak var batimentos: UILabel!

if let actualBpm = bpm{
  print(actualBpm)
  batimentos.text = "\(actualBpm)"
} else {
  print("ELSE bpm")
}