在SwiftUI中，选项卡视图TabItem的选定选项卡图像始终为蓝色

import SwiftUI

struct ContentView: View {
    var body: some View {
        TabView {
            Text("Tab 1")
                .tabItem {
                    Image(systemName: "1.circle")
                    Text("Tab 1")
                }
            
            Text("Tab 2")
                .tabItem {
                    Image(systemName: "2.circle")
                    Text("Tab 2")
                }
        }
        .onAppear(perform: customizeTabBarAppearance)
    }
    
    func customizeTabBarAppearance() {
        if let tabBarController = UIApplication.shared.windows.first?.rootViewController as? UITabBarController {
            tabBarController.tabBar.tintColor = .red // 设置你想要的颜色
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}