Fixed MacOS App Windows / Sizing Windows

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Hi, i am trying to design an absolutely simple MacOS app whose window cannot be changed or can only be changed to a certain extent. So by grabbing the borders, edges and corners. Unfortunately, it doesn't work at all. The Apple documentation is quite straightforward: https://developer.apple.com/documentation/visionOS/positioning-and-sizing-windows Work with XCode 16.2 on Mac Mini M1 with MacOS 15.2 ... and less developer experience ;-) Does anyone have any ideas? Does it perhaps not comply with the UI guidelines? Greetings, Oliver

Answered by ollikaush in 818988022

Thanks to chatGPT ... I'll post the finished basic structure for the window here. It's technically the window you see when you click on the Apple logo to open the “About this Mac” function ....


@main
struct FixedSizeWindowApp: App {
    @NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

    var body: some Scene {
        WindowGroup {
            EmptyView() // No additional content required as the window is managed by AppDelegate
        }
    }
}

class AppDelegate: NSObject, NSApplicationDelegate {
    var window: NSWindow!

    func applicationDidFinishLaunching(_ notification: Notification) {
        // Create Window
        let windowRect = NSRect(x: 0, y: 0, width: 1600, height: 1000)
        window = NSWindow(
            contentRect: windowRect,
            styleMask: [.titled, .closable], // Title bar and close button
            backing: .buffered,
            defer: false
        )
        
        // Window properties
        window.center() // Center window
        window.title = "About this Mac" // Set title
        window.isReleasedWhenClosed = false // Keep window
        window.isMovableByWindowBackground = true // Movable window
        
        // Fixed window size
        window.minSize = windowRect.size
        window.maxSize = windowRect.size

        // Contents of the window with SwiftUI
        let hostingView = NSHostingView(rootView: ContentView())
        hostingView.frame = window.contentView!.bounds
        hostingView.autoresizingMask = [.width, .height]
        window.contentView = hostingView
        
        // Show Window
        window.makeKeyAndOrderFront(nil)
    }

    func applicationWillTerminate(_ notification: Notification) {
        // Insert cleanup functions etc.
    }
}

struct ContentView: View {
    var body: some View {
        VStack {
            Image(systemName: "applelogo")
                .font(.system(size: 50))
                .padding()

            Text("About this Mac")
                .font(.title)
                .bold()

            Spacer()
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
    }
}

Happy holidays, Oliver

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Answer 1

ollikaush OP

1d

Accepted Answer

Thanks to chatGPT ... I'll post the finished basic structure for the window here. It's technically the window you see when you click on the Apple logo to open the “About this Mac” function ....


@main
struct FixedSizeWindowApp: App {
    @NSApplicationDelegateAdaptor(AppDelegate.self) var appDelegate

    var body: some Scene {
        WindowGroup {
            EmptyView() // No additional content required as the window is managed by AppDelegate
        }
    }
}

class AppDelegate: NSObject, NSApplicationDelegate {
    var window: NSWindow!

    func applicationDidFinishLaunching(_ notification: Notification) {
        // Create Window
        let windowRect = NSRect(x: 0, y: 0, width: 1600, height: 1000)
        window = NSWindow(
            contentRect: windowRect,
            styleMask: [.titled, .closable], // Title bar and close button
            backing: .buffered,
            defer: false
        )
        
        // Window properties
        window.center() // Center window
        window.title = "About this Mac" // Set title
        window.isReleasedWhenClosed = false // Keep window
        window.isMovableByWindowBackground = true // Movable window
        
        // Fixed window size
        window.minSize = windowRect.size
        window.maxSize = windowRect.size

        // Contents of the window with SwiftUI
        let hostingView = NSHostingView(rootView: ContentView())
        hostingView.frame = window.contentView!.bounds
        hostingView.autoresizingMask = [.width, .height]
        window.contentView = hostingView
        
        // Show Window
        window.makeKeyAndOrderFront(nil)
    }

    func applicationWillTerminate(_ notification: Notification) {
        // Insert cleanup functions etc.
    }
}

struct ContentView: View {
    var body: some View {
        VStack {
            Image(systemName: "applelogo")
                .font(.system(size: 50))
                .padding()

            Text("About this Mac")
                .font(.title)
                .bold()

            Spacer()
        }
        .frame(maxWidth: .infinity, maxHeight: .infinity)
    }
}

Happy holidays, Oliver

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