有没有办法将UIPickerView以Swift格式添加到UIAlertController (Alert或ActionSheet)中?

I'm totally new to swift (and iOS programming at all), but I started messing around with it (it wasn't a good idea when everything is still beta version :D). So I tried to figure it out by myself, but still nothing. Even tried to add subview containing picker without any success. So can any one help me?I'm totally new to swift (and iOS programming a