In my Xcode Swift project, I have a view controller that has a programatically created back button for the left bar button item. The text shows up, but the back arrow is missing. How do I add a back arrow so that it matches the other view controllers in my project? I'd prefer to not have to use a custom image, but if that is the only way then I'd like to know how to do it.
var backButton = UIBarButtonItem(title: "My List", style: UIBarButtonItemStyle.Plain, target: self, action: "goBack")
self.navigationItem.leftBarButtonItem = backButton