import SwiftUI

struct CustomTabView: View {
    init() {
        // 配置 UITabBarAppearance
        let appearance = UITabBarAppearance()
        appearance.configureWithOpaqueBackground() // 使用不透明背景
        
        // 背景颜色和阴影
        appearance.backgroundColor = UIColor.systemBlue // 背景颜色
        appearance.shadowColor = UIColor.gray // 阴影颜色
        
        // 配置未选中和选中样式
        let normalAttributes: [NSAttributedString.Key: Any] = [
            .font: UIFont.systemFont(ofSize: 14, weight: .regular),
            .foregroundColor: UIColor.lightGray
        ]
        let selectedAttributes: [NSAttributedString.Key: Any] = [
            .font: UIFont.systemFont(ofSize: 16, weight: .bold),
            .foregroundColor: UIColor.white
        ]
        appearance.stackedLayoutAppearance.normal.titleTextAttributes = normalAttributes // 未选中文字样式
        appearance.stackedLayoutAppearance.selected.titleTextAttributes = selectedAttributes // 选中文字样式
        appearance.stackedLayoutAppearance.normal.iconColor = UIColor.lightGray // 未选中图标颜色
        appearance.stackedLayoutAppearance.selected.iconColor = UIColor.white // 选中图标颜色
        
        // 应用于所有 TabBar
        UITabBar.appearance().standardAppearance = appearance
        if #available(iOS 15.0, *) {
            UITabBar.appearance().scrollEdgeAppearance = appearance
        }
        UITabBar.appearance().isTranslucent = false // 禁用透明效果
    }
    
    var body: some View {
        TabView {
            Text("Home Screen")
                .tabItem {
                    Image(systemName: "house.fill")
                    Text("Home")
                }
            
            Text("Profile Screen")
                .tabItem {
                    Image(systemName: "person.fill")
                    Text("Profile")
                }
        }
    }
}