Replace Navigation Item Text Title with an Image

LogoTitle.swift

// Logo in place of title function (Swift 4)
// call this from viewDidLoad()
private func setSwooshTitle() {
    // set the navigation title to a bundled image
    let logoWidth = 60
    let logoHeight = 44 // this is actually the height of the navbar
    
    let bundle = Bundle(for: type(of: self)) // get the asset bundle
    let logo = UIImage(named: "icons.logo", in: bundle, compatibleWith: self.traitCollection)!
    let imageView = UIImageView(frame: CGRect(x: -logoWidth/2, y: -logoHeight/2, width: logoWidth, height: logoHeight)) // set the bounds and positioning for the logo
    let titleView = UIView() // wrapping in a UIView fixes a scaling problem
   
    imageView.image = logo
    imageView.contentMode = .scaleAspectFit // scale to fit inside frame proportionately
    titleView.addSubview(imageView)
    
    // set the navigationItem's titleView to our new view
    self.navigationItem.titleView = titleView
 }