My company wants to build two apps for two separate product lines, but we want our users to be able to sign in to both apps with the same credentials, and we want Sign In with Apple to be an option. Is it possible to associate the apps with one another in a way that Sign In with Apple will produce the same token for the same Apple ID in both apps?

You used to be able to use the "User Defined Runtime Attributes" section in Interface Builder to add attributes such as layer.borderColor, layer.borderWidth, layer.cornerRadius, etc. I can still enter these values, but they don't do anything. What happened? I can still set them via code and then they work, but it's much more convenient to be able to do it in interface builder.

I need some clarification on what is supposed to happen if the "allowsBackgroundLocationUpdates" flag on CLLocationManager is set to true, and only the "While in Use" permission has been given. The customer I'm working with thinks that this combination should allow the app to receive location updates in the background indefinitely, as long as the app was in the foreground when we started receiving them. What we've experienced is inconsistent. App updates do continue when the screen locks and in some cases when we switch to another app, but often they do not. Our app doesn't require location updates 24/7, it requires them for a period of time when the user is performing an activity. The user starts and stops the activity in the app, and the activity might last up to a couple of hours. Can we do this using "While in Use" or do we need to request "Always" ?

I'm building a custom camera screen that displays the camera image on a preview layer and then captures an image, using AVCaptureSession. When the picture is captured, I immediately load it into a UIImageView in order to display it to the user for approval. I've actually done this many times before, but this is the first time I've tried to do it in an app that supports interface rotation. If I hold the phone in Portrait mode and capture a picture, everything works as expected. When the user rotates the phone into Landscape orientation, I detect this and I replace the preview layer (AVCaptureVideoPreviewLayer) with a new one, specifying connection.videoRotationAngle in order to make the image appear in the right orientation. I'm a little surprised that this is necessary, and it's not a smooth transition, but that doesn't matter. What does matter is that when I capture the image, it is in the wrong orientation. I tried rotating it myself, but this doesn't seem to make any difference. What am I doing wrong?

I'm writing an app in which the user is expected to initiate location tracking, let the app track for a period of time (a few minutes to a couple of hours) and then discontinue tracking. We want the user to be able to switch apps or let their device lock while tracking without losing any location updates. My understanding is that this can be done with the "While in use" location permission and does not require "Always". We don't want to have to ask our users for the "Always" permission. I'm configuring the location manager this way: locationManager.delegate = self locationManager.desiredAccuracy = kCLLocationAccuracyBestForNavigation locationManager.allowsBackgroundLocationUpdates = true locationManager.showsBackgroundLocationIndicator = true locationManager.distanceFilter = kCLDistanceFilterNone locationManager.activityType = .otherNavigation locationManager.pausesLocationUpdatesAutomatically = false (The user is expected to be walking around in an outdoor location, stopping occasionally to take notes and pictures). I've tested this using both an iPhone and an iPad that relies on an external GPS device. It works. I can lock the device and see a continuous stream of location updates in the debugger for hours. I've also tested it while walking outdoors. However, my customer keeps reporting that the app stops tracking his location whenever it goes into the background. He says that it will track his location fine while in the foreground, but when he backgrounds it, it stops getting location updates. Then when it comes into the foreground again, it resumes. When we plot the locations on a map, you see a straight line between the place where the app went into background and where it woke up again. We know for sure that the app is just transitioning to and from the background and that it is not being terminated and restarted. I can't reproduce this result on my devices and can't figure out what I'm doing wrong. The customer says he has another app on his device (which is also an iPad with an external GPS) and that the other app does track him when it is in the background. My app does process all of the locations received in the didUpdateLocations method and not just the last one, so it's not that I'm getting the updates and ignoring them. I'm also not receiving any calls to 'locationManagerDidPauseLocationUpdates', 'didFinishDeferredUpdatesWithError', or 'didFailWithError'. The only explanation I can think of at the moment is that something changed in iOS. I know that the other app my customer is using is fairly old and built against an old version of the iOS SDK. Thanks for your help.

I installed a custom font (Font awesome) into my app. I triple checked that I did everything right: the font files are included in the bundle (they appear in the "Copy Bundle Resources" build phase) and the names of the fonts appear in the Info.plist file under "Fonts provided by application". In Interface builder, I select a Label, set the font to "Custom", then I click the Family list to select the font I want. Once or twice, I was actually able to see the Font Awesome fonts in this list and select one. However, they no longer appear there when I create new labels in new views. I do not understand why. I've been limping along by copying a label from one of the views where it worked and pasting it into the new view, but this is tiresome. I know the fonts are installed correctly because I can see them when I run the app. Why are the fonts not showing up on the font list in interface builder?

I'm unable to use Organizer due to this error. The app shown in the error message is an old, unused test app. I'd delete it if I could, but there doesn't seem to be a way to do that. The app is named "@Home Test" and I suspect that the @ character is what's causing the problem. I need to use Organizer for a completely different app on another team, but I can't get past this.

I've been aware for some time that Push notifications work on the iOS simulator now -- I see them pop up while I'm working. However, it would seem that SILENT push notifications do not work. I came to this conclusion only after several frustrating hours of debugging my app, thinking either the app was broken or the server wasn't sending the notification. Finally I tested it on a device and found that it actually works fine. Why does such a limitation exist? If I can't depend on the simulator to handle ALL of the notifications, I'd rather it didn't work at all. Having it work part of the time on some notifications is really confusing.

Will Apple continue to support it, or will we wake up one day to find that Swift is the only viable language?It's a serious question. Careers depend on it. I don't accept the "No comment" approach that Apple usually takes. It's cruel.I'm willing to put the time into learning Swift if I have to. I'm not going to do it if I don't. I want to know.Frank

Hi,It seems like it's pretty easy to consume HTTP Live Streaming content in an iOS app. Unfortunately, I need to consume media from an RTSP server. It seems to me that this is a very similar thing, and that all of the underpinnings for doing it ought to be present in iOS, but I'm having a devil of a time figuring out how to make it work without doing a lot of programming.For starters, I know that there are web-based services that can consume an RTSP stream and rebroadcast it as an HTTP Live Stream that can be easily consumed by the media players in iOS. This won't work for me because my application needs to function in an environment where there is no internet access (it's on a private Wifi network where the only other thing on the network is the device that is serving the RTSP stream).Having read everything I can get my hands on and exploring third-party and open-source solutions, I've compiled the following list of ideas:1. Using an iOS build of the open-source ffmpeg library, which supports RTSP, I've come up with a test app that can receive the RTSP packets, decode them, create UIImages out of the frames, and display those frames on-screen. This provides a crude player, but performance is poor, most likely because ffmpeg can't take advantage of any hardware acceleration. It also doesn't provide me with any way to integrate the video stream into AVFoundation, so I'm on my own as far as saving the stream to a file, transcoding it, etc.2. I know that the AVURLAsset class doesn't directly support the RTSP scheme. Since I have access to the undecoded RTSP packets via ffmpeg, I've thought it should be possible to implement RTSP support myself via a custom NSURLProtocol, essentially fooling AVFoundation into reading those packets as if they originated in a file. I'm not sure if this would work, since the raw packets coming from the RTSP server might lack the headers that would otherwise be present in data being read from a file. I'm not even sure if AVFoundation would recognize my custom protocol.3. If a protocol doesn't work, I've considered that I might be able to implement my own local HTTP Live Streaming server that converts the RTSP packets into an HTTP stream that the media players can read. This sounds like a terribly convoluted solution to the problem, at best, and very difficult at worst.4. Going back to solution (1), if I could speed up the decoding by using some iOS CoreVideo function instead of ffmpeg, this solution might be okay. However, I can't find any documentation for CoreVideo on iOS (Apple only documents it for OS X).5. I'm certainly willing to license a third-party solution if it works well and provides good performance. Unfortunately, everything I've found so far is pretty crummy and mostly just leverages ffmpeg and/or VLC. What is most disappointing to me is that nobody seems to be able or willing to provide a solution that neatly integrates with AVFoundation. I really want to make my RTSP stream available as an AVAsset so I can use it with AVFoundation players and other classes -- I don't want to build an app that relies on custom third-party code for everything.Any ideas, tips, advice would be greatly appreciated.Thanks,Frank

I'm working with an Espressif ESP32-C5 device. The firmware on the device is based on Espressif's base software, which provides Wifi provisioning services via Bluetooth. My firmware also provides its own Bluetooth services too. When the Espressif part of the firmware connects to Wifi, it re-initializes the entire Bluetooth stack, eliminating all of its own services. Mine get added back, but my app starts failing and doing weird things at this point. I believe it is due to iOS caching the GATT configuration and not recognizing that it has changed. If I restart my phone, the problem is cleared. But this is not a good solution to the problem. I need a way to let iOS know that it should clear any cached information related to this device. How can I do that?