Pencilkit MapKit article

setup-navbar-pencilkit-mapkit.swift

var toggleDrawItem : UIBarButtonItem!
    
var disableDraw : Bool = false
    
func setNavigationBar() {
let previewItem = UIBarButtonItem(title: "Preview", style: .done, target: self, action: #selector(preview))
        
let clearItem = UIBarButtonItem(title: "Clear", style: .plain, target: self, action: #selector(clear))
toggleDrawItem = UIBarButtonItem(title: "Drag", style: .plain, target: self, action: #selector(dragDrawToggler))
let navigationItem = UINavigationItem(title: "")
navigationItem.rightBarButtonItems = [clearItem,previewItem]
navigationItem.leftBarButtonItem = toggleDrawItem
navigationBar = UINavigationBar(frame: .zero)
navigationBar?.isTranslucent = false
        
navigationBar!.setItems([navigationItem], animated: false)
navigationBar!.translatesAutoresizingMaskIntoConstraints = false
view.addSubview(navigationBar!)
navigationBar!.backgroundColor = .clear
NSLayoutConstraint.activate([
navigationBar!.topAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.topAnchor),
navigationBar!.heightAnchor.constraint(equalToConstant: 60),
navigationBar!.leadingAnchor.constraint(equalTo: view.leadingAnchor),
navigationBar!.trailingAnchor.constraint(equalTo: view.trailingAnchor),
])
}