【Xcode/SwiftUI】ハーフモーダルビューを作る

import SwiftUI

struct HomeView: View {
    @State private var isShowHalfView = false

    var body: some View {
        ZStack {
            Color.gray.opacity(0.3)
                .ignoresSafeArea()
            Button {
                isShowHalfView = true
            } label: {
                Text("Show HalfModalView")
                    .font(.largeTitle)
            }
        }
        .sheet(isPresented: $isShowHalfView) {
            HalfModalView()
                .presentationDetents([.medium])
        }
    }
}

import SwiftUI

struct HalfModalView: View {
    @State private var selectedTheme = "book"
    private let themes = ["book", "eyeglasses", "timer"]

    var body: some View {
        NavigationStack {
            Form {
                Picker("Appearance", selection: $selectedTheme) {
                    ForEach(themes, id: \.self) { themes in
                        Image(systemName: themes)
                    }
                }
                .pickerStyle(.segmented)
                .pickerStyle(.navigationLink)
                switch selectedTheme {
                case "book":
                    Text("Book View")
                        .font(.largeTitle)
                case "eyeglasses":
                    Text("Eyeglasses View")
                        .font(.largeTitle)
                case "timer":
                    Text("Timer View")
                        .font(.largeTitle)
                default:
                    EmptyView()
                }
            }
            .navigationTitle("This is Half-Modal View")
            .navigationBarTitleDisplayMode(.inline)
        }
    }
}