Call UIKIT function from SWIFTUI - swiftui

Question

I have a Storyboard UIKIT function getAcctBalance(). In my UIKIT file I display a UIHostingController to load a SWIFTUI view. In the SWIFTUI view I want to call my function getAcctBalance().
SWIFTUI:
import SwiftUI
import SWXMLHash
struct UserDashboard: View {
#ObservedObject var userModel: UserDashboardModel
Button(action: {
UserDashboardHostVC.getAcctBalance() //This function call is not working
}){
Text("Load Balance")
}
Text(userModel.totalBalance) //by default it is 0.0 and when button is pressed it should return 599
}
UIKIT:
import UIKit
class UserDashboardModel: ObservableObject {
#Published var totalBalance = 0.0
}
class UserDashboardHostVC: UIViewController {
var userModel = UserDashboardModel()
override func viewDidLoad() {
super.viewDidLoad()
let controller = UIHostingController(rootView: UserDashboard(userModel: self.userModel))
controller.view.translatesAutoresizingMaskIntoConstraints = false
self.addChild(controller)
self.view.addSubview(controller.view)
controller.didMove(toParent: self)
}
func getAcctBalance {
userModel.totalBalance = 599
}

Answer 1

Here is a sample
class UserDashboardModel: ObservableObject {
#Published var totalBalance = 0.0
internal var uIViewController: UserDashboardHostVC? = nil
func getAcctBalance(){
if uIViewController != nil{
uIViewController!.getAcctBalance()
}else{
print("view controller is not connected")
}
}
}
struct UserDashboard: View {
#ObservedObject var userModel: UserDashboardModel
var body: some View{
VStack{
Button(action: {
userModel.getAcctBalance() //Call shared model
}){
Text("Load Balance")
}
Text(userModel.totalBalance.description) //Now it will change
}.frame(width: 400, height: 400, alignment: .center)
}
}
class UserDashboardHostVC: UIViewController {
var userModel = UserDashboardModel()
override func viewDidLoad() {
super.viewDidLoad()
//Crucial connection
userModel.uIViewController = self
let controller = UIHostingController(rootView: UserDashboard(userModel: self.userModel))
self.addChild(controller)
self.view.addSubview(controller.view)
controller.view.translatesAutoresizingMaskIntoConstraints = false
//Update constraints per use case
controller.view.centerXAnchor.constraint(equalTo: view.centerXAnchor).isActive = true
controller.view.centerYAnchor.constraint(equalTo: view.centerYAnchor).isActive = true
controller.didMove(toParent: self)
}
func getAcctBalance() {
userModel.totalBalance = 599
}
}