Understanding UIViewRepresentable - swift

Question

Swift 5.0 iOS 13
Trying to understand how UIViewRepresentable works, and put together this simple example, almost there, but maybe its complete nonsense. Yes, I know there is already a tapGesture in SwiftUI, this is just a test.
Won't compile cause it says 'super.init' isn't called on all paths before returning from initialiser, which I try and set but obviously not correctly.
import SwiftUI
struct newView: UIViewRepresentable {
typealias UIViewType = UIView
var v = UIView()
func updateUIView(_ uiView: UIView, context: Context) {
v.backgroundColor = UIColor.yellow
}
func makeUIView(context: Context) -> UIView {
let tapGesture = UITapGestureRecognizer(target: self, action: #selector(Coordinator.handleTap(sender:)))
v.addGestureRecognizer(tapGesture)
return v
}
func makeCoordinator() -> newView.Coordinator {
Coordinator(v)
}
final class Coordinator: UIView {
private let view: UIView
init(_ view: UIView) {
self.view = view
}
required init?(coder: NSCoder) {
fatalError("init(coder:) has not been implemented")
}
#objc func handleTap(sender: UITapGestureRecognizer) {
print("tap")
}
}
}

Answer 1

Just make your Coordinator is a NSObject, it usually plays bridge/controller/delegate/actor role, but not presentation, so should not be is-a-UIView
final class Coordinator: NSObject {
private let view: UIView
init(_ view: UIView) {
self.view = view
}
and one more...
func makeUIView(context: Context) -> UIView {
// make target a coordinator, which is already present in context !!
let tapGesture = UITapGestureRecognizer(target: context.coordinator,
action: #selector(Coordinator.handleTap(sender:)))
v.addGestureRecognizer(tapGesture)
return v
}

Answer 2

Thats because your Coordinator is a subclass of the UIView and you
Must call a designated initializer of the superclass 'UIView'
before returning from the init:
init(_ view: UIView) {
self.view = view
super.init(frame: .zero) // Or any other frame you need
}