how to set app launch window size

[jiangk576]

I'm developing an app in windows and mac , I just wonder how to set app launch window size? Is there a way to make settings work in both mac and windows?

[nor0x]

i have just posted an updated answer to this question here - it's a solution for Windows:
#2370 (comment)

I have another option that doesn't rely on PInvoke directly and works >preview12. To work with AppWindow from Microsoft.UI.Windowing you need to get the WindowId from the window handle.

The AppWindow object provides functionality like Resize or MoveAndResize

        Microsoft.Maui.Handlers.WindowHandler.WindowMapper.AppendToMapping(nameof(IWindow), (handler, view) =>
        {
#if WINDOWS
            var nativeWindow = handler.NativeView;
            nativeWindow.Activate();

            IntPtr hWnd = WinRT.Interop.WindowNative.GetWindowHandle(nativeWindow);
            WindowId windowId = Microsoft.UI.Win32Interop.GetWindowIdFromWindow(hWnd);
            AppWindow appWindow = Microsoft.UI.Windowing.AppWindow.GetFromWindowId(windowId);
            appWindow.MoveAndResize(new Windows.Graphics.RectInt32(0, 0, 500, 500));
#endif
        });

[jiangk576]

thanks，this works in windows。do you know how to set app window size in mac？I set the nativeView.frame，but It doesn't work correctly。