title: Change UIBarButtonItem Text Font Size and Color
body: <p>I would like to know how can I change the text font of the <code>BarButtonItem</code> ? While I could not set the setTitleTextAttributes </p>
  
  <pre><code>class TextfieldLogin : UITextField {
  
  func INIT(){
      let numberToolbar = UIToolbar(frame: CGRectMake(0,0,320,50))
      numberToolbar.tintColor = UIColor.whiteColor()
      numberToolbar.barTintColor = UIColor(red: 155.0/255, green: 14.0/255, blue: 45.0/255, alpha: 1.0)
  
      numberToolbar.items = [
          UIBarButtonItem(barButtonSystemItem: UIBarButtonSystemItem.FlexibleSpace, target: nil, action: nil),
          UIBarButtonItem(title: "DONE", style: UIBarButtonItemStyle.Plain, target: self, action: "close"),
          UIBarButtonItem.setTitleTextAttributes([NSFontAttributeName : UIFont.systemFontOfSize(18.0),NSForegroundColorAttributeName : UIColor.redColor(),NSBackgroundColorAttributeName:UIColor.blackColor()],
              forState: UIControlState.Normal)        ]
  
      numberToolbar.sizeToFit()
  
      }
  }
  </code></pre>