look to do it in iOS touch to create the component in execution time, to do it you do it in the following way:
var bottomAppBar: MDCBottomAppBarView {
let bottomAppBar = MDCBottomAppBarView()
// background color Bottom App Bar
bottomAppBar.barTintColor = UIColor(named: "Teal")
// Image floatingButton
bottomAppBar.floatingButton.setImage(UIImage(named: "CloudUpload"), for: .normal)
// Background color floatingButton
bottomAppBar.floatingButton.backgroundColor = UIColor(named: "Gray600")
// here you define the size of the bottom app bar, in my case I define the size based on a view that I added to the ViewController
let size = bottomAppBar.sizeThatFits(self.containerView.bounds.size)
bottomAppBar.frame = CGRect(x: 0, y: 0, width: size.width, height: size.height)
// The following lines of code are to define the buttons on the right and left side
let barButtonLeadingItem = UIBarButtonItem(
image: UIImage(named:"IconName"), // Icon
style: .plain,
target: self,
action: #selector(self.onMenuButtonTapped))
let barButtonTrailingItem = UIBarButtonItem(
image: UIImage(named: "IconName"), // Icon
style: .plain,
target: self,
action: #selector(self.onNavigationButtonTapped))
bottomAppBar.leadingBarButtonItems = [barButtonLeadingItem]
bottomAppBar.trailingBarButtonItems = [barButtonTrailingItem]
return bottomAppBar
}
// Add bottombar to view
self.containerView.addSubview(bottomAppBar)
NOTE: the above code is tested in Swift 5.0