iPad上的SwiftUI NavigationBar背景渐变

import SwiftUI

struct CustomNavigationBar: View {
    var body: some View {
        GeometryReader { geometry in
            ZStack {
                LinearGradient(gradient: Gradient(colors: [Color.red, Color.blue]), startPoint: .top, endPoint: .bottom)
                    .frame(height: geometry.safeAreaInsets.top + 44)
                    .edgesIgnoringSafeArea(.top)
                
                HStack {
                    Button(action: {
                        // 处理返回按钮点击事件
                    }) {
                        Image(systemName: "chevron.left")
                            .foregroundColor(.white)
                    }
                    
                    Spacer()
                    
                    Text("Title")
                        .foregroundColor(.white)
                        .font(.headline)
                    
                    Spacer()
                    
                    Button(action: {
                        // 处理右侧按钮点击事件
                    }) {
                        Image(systemName: "gear")
                            .foregroundColor(.white)
                    }
                }
                .padding(.horizontal)
                .frame(height: 44)
                .padding(.top, geometry.safeAreaInsets.top)
            }
        }
    }
}

struct ContentView: View {
    var body: some View {
        NavigationView {
            VStack {
                Text("Hello, World!")
            }
            .navigationBarTitle("")
            .navigationBarHidden(true)
            .navigationBarBackButtonHidden(true)
            .overlay(CustomNavigationBar().edgesIgnoringSafeArea(.top))
        }
    }
}

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