如何在SwiftUIs TabView中设置默认标签？

struct ContentView: View {
    @State private var selectedTab = 0
    
    var body: some View {
        TabView(selection: $selectedTab) {
            Text("Tab 1")
                .tabItem {
                    Image(systemName: "1.circle")
                    Text("Tab 1")
                }
                .tag(0)
            
            Text("Tab 2")
                .tabItem {
                    Image(systemName: "2.circle")
                    Text("Tab 2")
                }
                .tag(1)
            
            Text("Tab 3")
                .tabItem {
                    Image(systemName: "3.circle")
                    Text("Tab 3")
                }
                .tag(2)
        }
    }
}