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Hi,I'm working with subscriptions.How do I know when a subscription expires, or is cancelled by the user? Does Apple push this information to my app automatically, or do I have to execute a command such as SKReceiptRefreshRequest or restoreCompletedTransactions?What is the difference between requesting a receipt refresh and restoring completed transactions?Thanks,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

Xcode won't remember my Git credentials if I close and re-open it. It remembers them while Xcode is running, but always asks me again whenever I shut it down and reopen it. My Git repository is hosted with Beanstalk, which is not one of the ones listed in the drop-down list in Xcode. I have saved my credentials with Git on the command line and I'm able to do Git command line operations without re-entering them, but Xcode doesn't seem to recognize this. I'm really getting tired of retyping my password all the time. What else can I do?

Hi,Usually when you create a new class or other file in Xcode, the default location of the new file is a folder with the same name as your project.Somehow, I've ended up with a project where the default location for new files is the folder above this (the one with the .xcodeproj file in it). I can certainly change the folder whenever I make a new file, if I remember to do it, but often I forget, and end up with half my files in one place and half in the other.What controls this default, and how can I change it back to the folder I want?Thanks.

Hi,I've been unable to upload a build for the last several hours. Xcode spins for a while on "Fetching list of teams from the Developer Portal..." and then reports "The request timed out".This is not a new app or a new account; I've uploaded about 70 previous builds.Frank

Hi,The UIWebView class has a convenient property called scalesPageToFit, which can be used to allow small web pages to scale automatically to fit the frame of the web view.But this class is now deprecated in favor of WKWebView, which doesn't seem to have an equivalent property. How do I get the same functionality with WKWebView?Thanks,Frank

Is it possible to monitor the accelerometer or gyroscope when running in the background? My goal is to develop an app that detects sudden accelerations, like if the user fell down stairs, or was in a car accident. Thanks, Frank

Is there any way to scan for Bluetooth advertising messages while in the background if the device doesn't advertise any service IDs? I've been asked to build and app that does this. The device in question is an off-the-shelf medical alert button (my company doesn't make the device and can't alter its firmware). Upon examining it, I find that it does not advertise any service IDs nor does it offer any ability to connect, it works purely by sending advertising packets. I'm told that there are Android apps that can work with this device even while in the background. I checked the iOS bluetooth docs to see if any new scanning capabilities had been recently added, but could not find anything. Thanks, Frank

Is it possible to set a silent local notification?

How do I configure an iPad app to only work in portrait mode?In Xcode there are checkboxes for the four orientations, and only Portrait is checked, but the app still rotates into landscape mode.I also tried checking the "Requires full screen" box, but this didn't have any effect.Thanks,Frank

Hi,I have an app that includes a very simple one-button interface for recording a video. Our customer wants to be able to switch between the front and rear cameras while the video is being recorded, and without any interruption in the video stream. I notice that even the iOS built-in camera app doesn't do this, but I've heard that some third-party apps do.Is this possible in a practical way? If so, how would I go about it?Thanks,Frank

Hi, I'm trying to figure out how to manually position a subview within a view using SwiftUI. For example, when the user taps the screen, I want to place a small icon on the screen at the position tapped. I know how to get the coordinates of the tapped location but I don't know how to either place a view there or move an existing view already being shown to that location. In a regular non-SwiftUI app I can set the frame, or set up constraints. I don't know what the best approach is in SwiftUI. Thanks.

I'm using Sign In with Apple and requesting both .fullname and .email. The first time I sign in on any given device, the callback to my app has an authorization credential that contains an email address and a fullname, as expected. However, any subsequent login on the same device does not return either the email address or the fullname. All I get is the user ID string. The server I'm working with requires an email address to log in, so I need that email address. Why does it only appear the first time? Frank

Hi,My app is configured to receive location updates while running in the background.I need to send these updates to a server. I'd like to do it as soon as possible, but it isn't absolutely necessary.If I receive a location update in the background, am I allowed to send the data to a server immediately using an NSURLRequest? Do I need to call "beginBackgroundTaskWithExpirationHandler" to request time for the request to complete?Or, should I just store the location update in a local database and send it when the app is running in the foreground?I'm assuming that I can use an expression such as "[[UIApplication sharedApplication] applicationState] != UIApplicationStateActive" in my CLLocationManagerDelegate callback to determine whether I'm getting locations in the background.Thanks!