Can anyone from apple provide the spline formulation that is used in the CIToneCurve filter?The documentation says that a spline is passed thru the points you give it, but thereare a lot of spline types in the world, and they all can yield different shapes thru the same set of points.

i pushed a couple of builds up to app store connect on dec5 and they just disappeared. not showing as in-process or anything. anyone else see this happening?

sometimes, for the very same video file, we get an error from this call on iOS example of fail case path: /var/mobile/Media/DCIM/102APPLE/IMG_2685.mp4 sometimes it works fine. what? [[NSFileManager defaultManager] attributesOfItemAtPath:filepath error:&error]; anyone see this before?

We are using AVAssetWriter to write a movie file. All works fine, but when the app goes into the background and pauses operations, we would expect the writer to come back to life when you bring the app back into the foreground. However, it does not, it fails with this error code. Any hints, workarounds? Error Domain=AVFoundationErrorDomain Code=-11847 "Operation Interrupted" UserInfo={NSLocalizedRecoverySuggestion=Stop other operations and try again., NSLocalizedDescription=Operation Interrupted, NSUnderlyingError=0x2820356b0 {Error Domain=NSOSStatusErrorDomain Code=-16121 "(null)"}}

has any one seen this and/or know the solution?what could cause a pause event to get triggered? we can trap when the event gets caught in the safari debuggerbut unable to see what is causing it. like who is sending the event? is there any way to trace the sending of media events in safari? we get random pause events recv'd by our video tag, a few seconds after video start.seems to be on videos with audio playing Only, ios10.3 and upokay on ios10.2UIWebView implementation

is there any recommend way to install a shortcut link in an app to make it easy for the user to get at it? or is maybe just a regular link that opens in a webview the only/best way? these type of automation shortcuts:: https://support.apple.com/guide/shortcuts/welcome/ios

how is this secure? i have to switch icloud off and on for testing icloud in apps, and everytime i do this, it vacuums up all my photos and puts them on the cloud.

is it possible for other iOS apps to hold onto microphone access when those apps are in the background? we see some cases where our app cannot get mic access (e.g. we can record video but we get no sound) and we think it might be another app such as Telegram "holding onto" the mic, because when we quit all other apps, our app works ok. this seems like an odd failure mode. any hints how to fix it?