从NavigationView中取消SwiftUI中的父模式

import SwiftUI

struct ContentView: View {
    @State private var isActive: Bool = false
    
    var body: some View {
        NavigationView {
            VStack {
                Button("跳转到目标视图") {
                    isActive = true
                }
            }
            .navigationBarTitle("主视图")
            .background(
                NavigationLink(
                    destination: DestinationView(),
                    isActive: $isActive,
                    label: { EmptyView() }
                )
            )
        }
    }
}

struct DestinationView: View {
    var body: some View {
        Text("目标视图")
            .navigationBarBackButtonHidden(true)
            .navigationBarItems(leading: backButton)
    }
    
    private var backButton: some View {
        Button(action: {
            // 返回上一个视图
            // 设置 isActive 为 false 可以取消父模式
            presentationMode.wrappedValue.dismiss()
        }) {
            Image(systemName: "chevron.left")
                .foregroundColor(.blue)
        }
    }
}