Adding image in the Navigation Bar - ios

Question

I was wondering the best approach to put an image into the navigation bar.
My initial thought was to create a cocoa touch class for UINavigationController and set it up that way, but I can seem to get it to working using the below code:
class NavBarImage: UINavigationController {
override func awakeFromNib() {
}
override func prepareForInterfaceBuilder() {
super.prepareForInterfaceBuilder()
self.setupView()
}
func setupView()
{
let navController = navigationController!
let image = #imageLiteral(resourceName: "BarTabsNavLogoWhite")
let imageView = UIImageView(image: image)
let bannerWidth = navController.navigationBar.frame.size.width
let bannerHeight = navController.navigationBar.frame.size.height
let bannerX = bannerWidth / 2 - image.size.width / 2
let bannerY = bannerHeight / 2 - image.size.height / 2
imageView.frame = CGRect(x: bannerX, y: bannerY, width: bannerWidth,
height: bannerHeight)
imageView.contentMode = .scaleAspectFit
navigationItem.titleView = imageView
}
}
I keep getting an "unexpectedly found nil while unwrapping an optional value" on let navController = navigationController!.
However, this method has also been working for me too. I created a cocoa touch class for UINavigationBar and used this code below:
import UIKit
class NavBarImg: UINavigationBar {
override init(frame: CGRect) {
super.init(frame: frame)
initialise()
}
required init(coder aDecoder: NSCoder){
super.init(coder: aDecoder)!
initialise()
}
func initialise(){
let imageView = UIImageView(frame: CGRect(x: 0, y: 0, width: 225, height: 40))
imageView.contentMode = .scaleAspectFit
let image = UIImage(named:"BarTabsNavLogoWhite")
imageView.image = image
imageView.frame.origin = CGPoint(x: self.superview?.center.x, y: self.superview?.center.y)
addSubview(imageView)
}
}
The only problem with this is that on different iPhones I cant figure out how to get the image to always be centered on any device using CGPoint.
Then for the last method I found and implemented is done by the code below:
#IBDesignable class test: UINavigationBar { #IBInspectable var imageTitle: UIImage? = nil {
didSet {
guard let imageTitle = imageTitle else {
topItem?.titleView = nil
return
}
let imageView = UIImageView(image: imageTitle)
imageView.frame = CGRect(x: 0, y: 0, width: 40, height: 30)
imageView.contentMode = .scaleAspectFit
topItem?.titleView = imageView
}
}
}
I really like this method because with the IBDesignable function you can see it in the storyboard. However the way I have my viewcontrollers set up with tableviews, after i go past the first view controller, the navigation bar image disappears in all other view controllers when I run the simulator.
Looking for advice to see which method is the best approach and how to possibly solve the problems I am having. Or if anyone has a different method that they have found that works, id love to see how it works!

Answer 1

you can simply add a image or customize the barbutton as follows:
let button = UIButton(type: .custom)
button.setImage(UIImage(named: "icon_right"), for: .normal)
button.addTarget(self, action: #selector(buttonAction), for: .touchUpInside)
button.frame = CGRect(x: 0, y: 0, width: 53, height: 31)
button.imageEdgeInsets = UIEdgeInsetsMake(-1, 32, 1, -32)//move image to the right
let label = UILabel(frame: CGRect(x: 3, y: 5, width: 20, height: 20))
label.font = UIFont(name: "Arial-BoldMT", size: 16)
label.text = "title"
label.textAlignment = .center
label.textColor = .black
label.backgroundColor = .clear
button.addSubview(label)
let barButton = UIBarButtonItem(customView: button)
self.navigationItem.rightBarButtonItem = barButton