I have a Catalyst app ('container') which hosts an embedded AUv3 Audio Unit extension ('plugin'). This used to work for years and has worked with this project until a few days ago. it still works on iOS as expected on MacOS the extension is never registered/installed and won't load extension won't show up with AUVal seems to have stopped working with the 26.1 XCode update I'm fairly certain the problem is not code related (i.e. likely build settings, project settings, entitlements, signing, etc.) I have compared all settings with another still-working project and can't find any meaningful difference (I can't request code-level support because even the minimal thing vastly exceeds the 250 lines of code limit.) How can I debug the issue? I literally don't know where to start to fix this problem, short of rebuilding the entire thing and hope that it magically starts working again.

I'm experimenting with getting my AUv3 plugins working correctly on iOS and MacOS using Catalyst. I'm having trouble getting the plugin windows to look right in Logic Pro X on MacOS. My plugin is designed to look right in Garageband's minimal 'letterbox' layout (1024x335, or ~1:3 aspect ratio) I have implemented supportedViewConfigurations to help the host choose the best display dimensions On iOS this works, although Logic Pro iPad doesn't seem to call supportedViewConfigurations at all, only Garageband does. On MacOS, Logic Pro does call supportedViewConfigurations but only provides oversized screen sizes, making the plugins look awkward. I can also remove the supportedViewConfigurations method on MacOS, but this introduces other issues: I guess my question boils down to this: how do I tell Logic Pro X on MacOS what the optimal window size of my plugin is, using Mac Catalyst?

I want to add a "bubble horizon" to a camera application to show if the user is keeping their phone level. For this, I'm using the Motion Attitude functionality of CMMotionManager. However, the output I'm getting is very inaccurate. I'm comparing it with Apple's own Measure app which is dead accurate, so the sensors are working fine. My own readings seem to be several degrees off. Am I missing some calibration step or something? - (void)processDeviceMotion:(CMDeviceMotion *)motion { // use quaternions to avoid Gimbal Lock CMQuaternion quat = motion.attitude.quaternion; // calculate roll in degrees double roll = atan2( 2 * ( quat.w * quat.x + quat.y * quat.z ), 1 - 2 * ( quat.x * quat.x + quat.y * quat.y ) ); roll = radiansToDegrees( roll ); NSLog( @"Roll: %f", roll ); }

My app successfully receives midi from BT MIDI devices when they are enabled through the CABTMidiLocalPeripheralViewController pattern. However, I would like the app to automatically reconnect to these BT MIDI devices in subsequent sessions whenever they are available. Is this possible without requiring the user to go through the connection view controller every time?

I'm 'porting' an iPad app to MacOS using Mac Catalyst, and I'm having trouble getting the document share sheet to work properly. I've tried two ways and they both result in the same thing: no share sheet appears, but only a little popup with a "More..." button (see image). Attempt #1: using a UIDocumentInteractionController... NSURL* url = [NSURL fileURLWithPath:fileToShare]; UIDocumentInteractionController* docController = [UIDocumentInteractionController interactionControllerWithURL:url]; [docController presentPreviewAnimated:YES]; [docController presentOptionsMenuFromRect:CGRectMake(x, y, 0, 0) inView:currentView animated:YES]; Attempt #2: using a UIActivityViewController... NSURL* url = [NSURL fileURLWithPath:fileToShare]; NSArray* shareData = @[url]; UIActivityViewController* activityController = [[UIActivityViewController alloc] initWithActivityItems:shareData applicationActivities:nil]; [self presentViewController:activityController animated:YES completion:NULL]; Since both mechanisms consistently give the same result (both work on iOS and not on MacOS), I have a feeling I need to set some kind of permission or entitlement to get this working on MacOS. But I can't find any hints or documentation to support this.