A SwiftUI, Swift and iOS source code to demonstrate working of infinite loading screen with pagination

InfiniteLoadingScreen.swift

//
//  InfiniteLoadingScreen.swift
//  Test
//
//  Created by Jayesh Kawli on 1/12/23.
//

import SwiftUI

struct Employee: Identifiable, Equatable {

    var id: String {
        name
    }

    let name: String
}

class ViewModel: ObservableObject {

    private let maximumNumberOfRecordsToFetch = 40

    @Published var listItems: [Employee] = []
    @Published var isLoading = true
    private var iteration = 0

    init() {
        loadItems()
    }

    func loadItems() {

        if iteration >= maximumNumberOfRecordsToFetch {
            self.isLoading = false
            return
        }

        // Artificial delay to give illusion of network service loading data
        DispatchQueue.main.asyncAfter(deadline: .now() + 1.0) {
            let employees = (self.iteration..<self.iteration + 10).map { Employee(name: String($0)) }
            self.iteration += 10
            self.listItems.append(contentsOf: employees)
        }
    }
}

struct InfiniteLoadingScreen: View {

    @ObservedObject var viewModel = ViewModel()

    var body: some View {
        List {
            ForEach(viewModel.listItems) { listItem in
                Text(listItem.name)

                if listItem == viewModel.listItems.last {
                    if viewModel.isLoading {
                        ProgressView().onAppear {
                            viewModel.loadItems()
                        }
                    }
                }
            }
        }
    }
}

struct InfiniteLoadingScreen_Previews: PreviewProvider {
    static var previews: some View {
        InfiniteLoadingScreen(viewModel: .init())
    }
}