I want to use a delegate method to update some UI in my top view controller from the current view controller. I'm getting error unexpectedly found nil while unwrapping an Optional value. Please have a look at the following code and suggest what's wrong.
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Vakas
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Whether your delegate method called? – Kathiravan G Jul 07 '15 at 08:31
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It's throwing error at sampleProtocol!.updateTextLabel(someText) – Vakas Jul 07 '15 at 08:33
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Check some text is valid string or nill – Kathiravan G Jul 07 '15 at 08:41
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I've printed it's value and it is a valid string. – Vakas Jul 07 '15 at 08:43
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Refer this http://stackoverflow.com/questions/24643522/fatal-error-unexpectedly-found-nil-while-unwrapping-an-optional-values – Kathiravan G Jul 07 '15 at 08:44
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Can you show how you present your `SecondViewController` ? – Michal Jul 07 '15 at 08:47
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I fixed it. I was missing prepareForSegue implementation in my first View Controller.
I had to assign the delegate to self in prepareForSegue.
I can't do it like
let vc = SecondViewController()
vc.sampleProtocol = self
which I was doing in my viewDidLoad()
Vakas
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You cannot set the delegate like you're doing in your code in viewDidLoad. You have to implement prepareForSegue and set your delegate there.
Nick
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