使用cases代替int - SwiftUI的TabBar

enum TabOption {
    case home
    case search
    case profile
}

struct ContentView: View {
    @State private var selectedTab: TabOption = .home
    
    var body: some View {
        TabView(selection: $selectedTab) {
            // Home View
            Text("Home")
                .tabItem {
                    Image(systemName: "house")
                    Text("Home")
                }
                .tag(TabOption.home)
            
            // Search View
            Text("Search")
                .tabItem {
                    Image(systemName: "magnifyingglass")
                    Text("Search")
                }
                .tag(TabOption.search)
            
            // Profile View
            Text("Profile")
                .tabItem {
                    Image(systemName: "person")
                    Text("Profile")
                }
                .tag(TabOption.profile)
        }
    }
}