UIApplication.sharedApplication().openURL(NSURL.URLWithString("https://www.google.com"))

//Check if is a valid URL
guard let url = NSURL(string: "https://www.google.com.br") else
{
    print("Error to upen url")
    return
}

//Check if can open URL
guard UIApplication.sharedApplication().canOpenURL(url) else
{
    print("Can't open URL")
    return
}

//If reach this point... You have a valid URL and your app can open it.
UIApplication.sharedApplication().openURL(url)

//If you still have a BAD_EXEC over here... believe... it´s some kind of witchcraft :O