AlertviewController Exception for action sheet

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If you are used the action sheet for the alert view controller then it will display an exception.The Fail case is below.

  let alert = UIAlertController(title: AppTitle, message: "message", preferredStyle: .actionsheet)

But if you use alert type then it will not display the exception.The working case below.



     let alert = UIAlertController(title: AppTitle, message: "message", preferredStyle: .alert)

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