このコードが役立つことがあります。
// MARK: - CUSTOM METHODS
func createNavBar() {
let leftNavigationButton = UIButton()
leftNavigationButton.setImage(UIImage(named: "ic_back.png"), forState: .Normal)
leftNavigationButton.frame = CGRectMake(10, 10, 20, 15)
leftNavigationButton.addTarget(self, action: "onBackButtonPressed:", forControlEvents: UIControlEvents.TouchUpInside)
let customBarItem = UIBarButtonItem(customView: leftNavigationButton)
self.navigationItem.leftBarButtonItem = customBarItem;
//set TitleAppIcon
let GR = UITapGestureRecognizer(target: self, action: Selector("headerLogoTapAction:"))
let imageView = UIImageView(frame: CGRect(x: 90, y: 0, width: ((UIScreen.mainScreen().bounds.width)/3), height: 40))
imageView.addGestureRecognizer(GR)
imageView.userInteractionEnabled = true
navigationItem.titleView = imageView
}