Half Sheet with UIKit for SwiftUI

HalfSheetWithUIKitForSwiftUI.swift

//
//  HalfSheetWithUIKitForSwiftUI.swift
//  TestAppForNewThinks
//
//  Created by Hasan Ali Şişeci on 23.12.2023.
//

import SwiftUI

extension View {
    /// For bottom Sheet
    func halfSheet<SheetView: View>(showSheet: Binding<Bool>, detents: [UISheetPresentationController.Detent] = [.large()], grabberPrefers: Bool = true, @ViewBuilder sheetView: @escaping () -> SheetView) -> some View {
        return background {
            HalfSheetHelper(showSheet: showSheet, detents: detents, grabberPrefers: grabberPrefers, sheetView: sheetView())
        }
    }
}

/// UIKit Integration...
struct HalfSheetHelper<SheetView: View>: UIViewControllerRepresentable {
    @Binding var showSheet: Bool
    var detents: [UISheetPresentationController.Detent]
    var grabberPrefers: Bool
    var sheetView: SheetView
    let controller = UIViewController()

    func makeUIViewController(context: Context) -> UIViewController {
        controller.view.backgroundColor = .clear
        return controller
    }

    func updateUIViewController(_ uiViewController: UIViewController, context:
        Context)
    {
        if showSheet {
            // presenting Modal View....
            let sheetController = CustomHostingController(rootView: sheetView, customDetents: detents, grabberPrefers: grabberPrefers)
            uiViewController.present(sheetController, animated: true) {
                DispatchQueue.main.async {
                    self.showSheet.toggle()
                }
            }
        }
    }
}

// Custom UIHostingController for halfSheet....
class CustomHostingController<Content: View>: UIHostingController<Content> {
    var customDetents: [UISheetPresentationController.Detent]
    var grabberPrefers: Bool
    init(rootView: Content, customDetents: [UISheetPresentationController.Detent], grabberPrefers: Bool) {
        self.customDetents = customDetents
        self.grabberPrefers = grabberPrefers
        super.init(rootView: rootView)
    }

    @MainActor required dynamic init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }

    override func viewDidLoad() {
        super.viewDidLoad()

        // setting presentation controller properties...
        if let presentationController = presentationController as? UISheetPresentationController {
            presentationController.detents = customDetents
            presentationController.prefersGrabberVisible = grabberPrefers
            presentationController.preferredCornerRadius = 12
        }
    }
}