Improved implementation considering iOS 15 (latest) update

TabBarView.swift

/// NOTE: based on the StackOverflow answer
/// https://stackoverflow.com/a/60107650/3527499

import SwiftUI

struct TabBarView: View {
    var items: [TabBarItem]
    @State var selectedIndex = 0
    
    init(_ items: [TabBarItem]) {
        self.items = items
    }
    
    var body: some View {
        ZStack {
            ForEach(items.indices) { index in
                self.items[index].view
                    .opacity(self.selectedIndex == index ? 1 : 0)
            }
            GeometryReader { geometry in
                VStack {
                    Spacer()
                    ZStack(alignment: .top) {
                        LinearGradient(
                            gradient: Gradient(colors: [.black.opacity(0.3), .black.opacity(0.4)]),
                            startPoint: .top,
                            endPoint: .bottom
                        ).frame(height: 70 + geometry.safeAreaInsets.bottom)
                        HStack {
                            ForEach(self.items.indices) { i in
                                Button {
                                    withAnimation(.easeInOut) {
                                        self.selectedIndex = i
                                    }
                                } label: {
                                    VStack {
                                        let imageForegroundColor: Color = self.selectedIndex == i ? .white : .white.opacity(0.4)
                                        self.items[i].image
                                            .foregroundColor(imageForegroundColor)
                                            .padding(.top, 10)
                                            .font(.title)
                                        Text(self.items[i].title)
                                            .foregroundColor(.white)
                                            .font(.system(size: 16, weight: .bold))
                                            .padding(.top, 10)
                                            .opacity(0.5)
                                    }
                                    .frame(maxWidth: .infinity)
                                }
                            }
                        }
                    }
                }
                .edgesIgnoringSafeArea(.bottom)
            }
        }
    }
}

struct TabBarItem {
    let view: AnyView
    let image: Image
    let title: String
    
    init<V: View>(view: V, image: Image, title: String) {
        self.view = AnyView(view)
        self.image = image
        self.title = title
    }
}

struct TabBarView_Previews: PreviewProvider {
    static var previews: some View {
        TabBarView([
            TabBarItem(
                view: Text("This is home screen"),
                image: Image(systemName:"house.fill"),
                title: "home"
            ),
            TabBarItem(
                view: Text("❤️‍🩹"),
                image: Image(systemName:"heart.fill"),
                title: "favorite"),
            
        ])
    }
}