子画面 ( .sheet )

デフォルト動作は、シュッと下から出てきて重なって表示

呼び元

swift

struct ContentView: View {
	@State private var openSheet: Bool = false // ★
	
	var body: some View {
		VStack {
			Button("Open") {
				openSheet = true // true/false で表示/非表示切り替わる
			}
		}
		.sheet(isPresented: $openSheet) {
			ChildView()
		}
	}
}

子画面

swift

struct InsertInfoView: View {
	@Binding var openSheet: Bool // ★
	@Environment(\.dismiss) var dismiss
	
	var body: some View {
		VStack {
		Text("子画面")
		Button("Close") {
			openSheet = false // true/false で表示/非表示切り替わる
		}
	}
}

子画面もうちょっと必要なのを盛り込むと

swift

import SwiftUI

struct FolderRenameDialog: View {
	@Environment(\.modelContext) private var modelContext
	@Environment(\.dismiss) var dismiss

	@Binding var folderPath: FolderPath?
	
	@State private var orgName: String = ""
	@State private var newName: String = ""

	var body: some View {
		NavigationStack {
			Form {
				Section {
					Text(orgName)
						.foregroundStyle(.secondary)
				} header: {
					Text("Before").textCase(.none)
				}

				Section {
					TextField("Name", text: $newName)
				} header: {
					Text("After").textCase(.none)
				}

			}
			.font(.subheadline)
			.navigationTitle("Rename Folder")
			#if os(iOS)
			.navigationBarTitleDisplayMode(.inline)
			#endif
			.toolbar {
				ToolbarItemGroup(placement: .primaryAction) {
					Button("Save") {

						// TODO: save ..
						
						dismiss()
					}
					.disabled(!isModified)
				}
				ToolbarItemGroup(placement: .cancellationAction) {
					Button("Cancel") {
						dismiss()
					}
				}
			}
		}
		.onAppear {
			if let folderPath = folderPath {
				orgName = folderPath.basename.trimmingCharacters(in: .whitespacesAndNewlines)
				newName = folderPath.basename.trimmingCharacters(in: .whitespacesAndNewlines)
			}
		}
	}
	
	var isModified: Bool {
		let newName = newName.trimmingCharacters(in: .whitespacesAndNewlines)
		
		if newName == "" || newName == orgName {
			return false
		}
		return true
	}
}