Make SwiftUI TabView background transparent

TransparentTabItem.swift

import SwiftUI

/// © 2025 shivaduk28, based on Sweeper
/// Original: https://stackoverflow.com/a/79591925
/// Licensed under CC BY-SA 4.0: https://creativecommons.org/licenses/by-sa/4.0/
/// Modifications made.
struct TransparentTabItem: UIViewControllerRepresentable {
  class HelperVC: UIViewController {
    override func didMove(toParent parent: UIViewController?) {
      super.didMove(toParent: parent)
      var currParent = parent
      while true {
        guard let parent = currParent else {
          break
        }
        if parent.tabBarController?.viewControllers?.contains(parent) == true {
          parent.view.backgroundColor = .clear
          parent.tabBarController?.view.backgroundColor = .clear
          break
        }
        currParent = currParent?.parent
      }
    }
  }

  func makeUIViewController(context: Context) -> HelperVC {
    HelperVC()
  }

  func updateUIViewController(_ uiViewController: HelperVC, context: Context) {
  }
}

extension View {
  public func transparentTabItem<V>(@ViewBuilder _ label: () -> V) -> some View where V: View {
    ZStack {
      TransparentTabItem()
      self
    }.tabItem(label)
  }
}