UINavigationBar TitleView with subtitle

Question

I want a titleView inside my UINavigationBar which has two lines of text instead of only one

My current implementiation works well when I have a \"Back\"-Button and

Answer 1

https://www.reddit.com/r/swift/comments/3izq7b/style_guidelines_for_navigation_bar_prompts/

extension UINavigationItem {

    //Make the title 2 lines with a title and a subtitle
    func addTitleAndSubtitleToNavigationBar (title: String, subtitle: String) {
        var label = UILabel(frame: CGRectMake(10.0, 0.0, 50.0, 40.0))
        label.font = UIFont.boldSystemFontOfSize(14.0)
        label.numberOfLines = 2
        label.text = "\(title)\n\(subtitle)"
        label.textColor = UIColor.blackColor()
        label.sizeToFit()
        label.textAlignment = NSTextAlignment.Center
        self.titleView = label
    }
}