Calling NSException.raise() in Swift

Question

I\'m trying to raise an exception in Swift by calling NSException.raise(). The definition is:

class func raise(_ name: String!, format format: String!, arguments         


        

Answer 1

The problem seems to have been that I didn't treat the error as an optional. The following works:

var error: NSError?
NSException.raise("Exception", format:"Error: %@", arguments:getVaList([error!]))

Or you could do the following in case error is nil:

NSException.raise("Exception", format:"Error: %@", arguments:getVaList([error ?? "nil"]))