setMinimumSize not working on macOS

[git-n-pissed]

The following code is being called in the main method right before runApp is called:

  // Don't allow the app window to be too small
  if(Platform.isWindows || Platform.isMacOS) {
    await windowManager.setMinimumSize(const Size(640, 480));
  }

Works as expected on Windows, but results in this error on macOS:

window_manager/WindowManager.swift:44: Fatal error: Unexpectedly found nil while unwrapping an Optional value

[damywise]

Hey, would you mind sharing a minimum reproducible example with me?
Also, have you checked if the one in the example works as expected?
I'm unable to reproduce this in MacOS Ventura 13.2.1 (22D68).
Thanks!

[temeddix]

Having the same issue here, I'm using macOS Ventura 13.2.1 on macbook pro 15-inch 2017. Flutter version is 3.10. For me, using any method of windowManager creates this error, not only setMinimumSize.

[temeddix]

I tried changing versions.

On 0.3.0

window_manager/WindowManager.swift:44: Fatal error: Unexpectedly found nil while unwrapping an Optional value

0.3.4

window_manager/WindowManager.swift:60: Fatal error: Unexpectedly found nil while unwrapping an Optional value

[temeddix]

Could it be the latest Flutter 3.10 causing this issue?

[temeddix]

Oops, it was because I missed out the following line:

await windowManager.ensureInitialized();

So this is not a bug, it's a mistake. After I added this line, it works like a charm.

[git-n-pissed]

Oops, it was because I missed out the following line:

await windowManager.ensureInitialized();

So this is not a bug, it's a mistake. After I added this line, it works like a charm.

I haven't used that line before (doesn't appear to be needed for Android or Windows builds). I had switched to desktop_window package, but I'll try window_manager again and use ensureInitialized to see if that fixes the issue for me as well.