更改选项卡式视图SwiftUI的凹槽区域背景颜色

struct ContentView: View {
    var body: some View {
        TabView {
            Text("Tab 1")
                .tabItem {
                    Image(systemName: "1.circle")
                    Text("Tab 1")
                }
                .tag(1)
            
            Text("Tab 2")
                .tabItem {
                    Image(systemName: "2.circle")
                    Text("Tab 2")
                }
                .tag(2)
        }
        .tabViewStyle(CustomTabViewStyle())
    }
}

struct CustomTabViewStyle: TabViewStyle {
    func makeBody(configuration: Configuration) -> some View {
        TabView(configuration)
            .background(Color.blue) // 设置凹槽区域的背景颜色
    }
}