需要停止我的 WindowGroup 在 MacOS 上生成新实例

Question

我正在创建一个使用

WindowGroup

和

MenuBarExtra

的 MacOS SwiftUI 应用程序，并且

MenuBarExtra

有一个菜单选项来启动我的应用程序。它利用深度链接允许

URL

加载

WindowGroup

，然后我的

ContentView

出现。但是，如果我从菜单栏项目多次启动应用程序，则会出现多个

WindowGroups

。

我想停止启动多个视图，只需启动该视图（如果该视图已关闭）或将现有视图置于前面（如果该视图已打开）。

请问有人有什么建议吗？

我不想使用

AppKit

，所以无论您建议什么解决方案，如果它仅在 SwiftUI 中创建，那就太好了。

这是我迄今为止尝试过的：

//
//  MyApp.swift
//  Power Schedule
//
//  Created by Paul Randall on 10/07/2023.
//
// Importing necessary frameworks
// MyApp.swift

import SwiftUI

// MyApp.swift

class AppState: ObservableObject {
    @Published var isMainWindowActive: Bool = false
}

@main
struct Power_ScheduleApp: App {
    @State private var menuBarExtraShown = true
    @State var isMainWindowOpen = false

    var body: some Scene {
        
        MenuBarExtra(isInserted: $menuBarExtraShown) {
            AppMenu()
        } label: {
            Label("", image: "psl")

        }
        .menuBarExtraStyle(.menu)

        WindowGroup {
            ContentView()
                .frame(width: 450, height: 948) // Set the desired width and height
                .fixedSize()
                .onAppear {
                    print("Main window appeared")
                    self.isMainWindowOpen = true
                }
                .onDisappear {
                    print("Main window disappeared")
                    self.isMainWindowOpen = false
                }
        }
        .handlesExternalEvents(matching: ["main"])
        .windowResizability(.contentSize)

        .commands {
            if isMainWindowOpen {
                CommandGroup(replacing: .newItem) {
                    Button("New Window", action: {})
                        .disabled(true)
                    // This is the same keyboard shortcut as the default New Window option.
                    // We're just doing this so that our disabled dummy option shows
                    // the same shortcut visually.
                        .keyboardShortcut(KeyboardShortcut("n", modifiers: [.command]))
                }
            } else {
                // By doing nothing here, we let the default
                // "File -> New Window" item display and handle input.
                EmptyCommands()
            }
        }
    }
}

struct AppMenu: View {
    @Environment(\.openURL) var openUrl
    @Environment(\.dismiss) var dismiss

    func launchAppMenu() {
        // Launch the window from a URL
        guard let url = URL(string: "launchps://main") else {return}
        openUrl(url)
    }
    func importMenu() {
        dismiss()
    }
    func quitAppMenu() {
        // func 3 code
    }

    var body: some View {
        Button(action: launchAppMenu, label: { Text("Launch My App") }).keyboardShortcut("n")
        Button(action: importMenu, label: { Text("Import Configs") }).keyboardShortcut("i")

        Divider()

        Button(action: quitAppMenu, label: { Text("Quit My App") }).keyboardShortcut("q")
    }
}

Answer 1

适用于 macOS 13+

使用

Window

代替

WindowGroup

窗户

在一个独特的窗口中呈现其内容的场景。

在您的代码中：

import SwiftUI

// MyApp.swift

@main
struct Power_ScheduleApp: App {
    @State private var menuBarExtraShown = true

    var body: some Scene {
        
        MenuBarExtra(isInserted: $menuBarExtraShown) {
            AppMenu()
        } label: {
            Label("", image: "psl")

        }
        .menuBarExtraStyle(.menu)

       Window("Power Schedule", id: "main") { // <- open only one unique window
            ContentView()
                .frame(width: 450, height: 948) // Set the desired width and height
                .fixedSize()
        }
        .handlesExternalEvents(matching: ["main"])
        .windowResizability(.contentSize)
    }
}