Sclalertview-swift: fatal error: unexpectedly found nil while unwrapping an Optional value

[ewan34500]

I can launch my app when I want to display an alert this error appear : fatal error: unexpectedly found nil while unwrapping an Optional value

The error line : let rv = UIApplication.sharedApplication().keyWindow! as UIWindow

[dancingbush]

Hi, I am getting the same error,
: let rv = UIApplication.sharedApplication().keyWindow! as UIWindow
did you find a solution?

[dancingbush]

Window must not be set in viewDidLoad so instead I moved code to viewDidAppear and to works fine.

[ewan34500]

It's right, now it's working, thanks, but maybe this AlertView can be better if it's work in the ViewDidLoad too ...