How to make tab view in SwiftUI

Issue #614

struct MyTabView: View {
    @EnvironmentObject
    var preferenceManager: PreferenceManager

    var body: some View {
        VOrH(isVertical: preferenceManager.preference.position.isVertical) {
            OneTabView(image: "one", text: "One", tab: .one)
            OneTabView(image: "two", text: "Two", tab: .two)
            OneTabView(image: "three", text: "Three", tab: .three)
            Spacer()
        }
    }
}

struct OneTabView: View {
    @EnvironmentObject
    var preferenceManager: PreferenceManager

    let image: String
    let text: String
    let tab: Tab

    var selected: Bool {
        preferenceManager.preference.tab == tab
    }

    var body: some View {
        Button(action: { self.preferenceManager.preference.tab = self.tab }) {
            VStack(spacing: 2) {
                Image(image)
                    .renderingMode(selected ? .original : .template)
                    .resizable()
                    .aspectRatio(contentMode: .fit)
                    .frame(height: 20)
                Text(text)
                    .font(.system(.caption, design: .rounded))
                    .fontWeight(selected ? .semibold : .none)
            }
        }
        .padding(.horizontal, 4)
        .buttonStyle(BorderlessButtonStyle())
        .frame(width: 60, height: 50)
        .background(selected ? R.color.selectedTabBackground : Color.clear)
        .cornerRadius(4)
    }
}