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dispatch_async to global much slower in recent Mac Catalyst versions?
has anyone else noticed much slower GCD runs in newer MacOS / Catalyst this seems like it used to be blazing fast: dispatch_async(dispatch_get_global_queue(QOS_CLASS_USER_INTERACTIVE, 0), ^{ // code to run }); now if I run a block on this type of queue versus the main thread, the dispatched code runs much slower vs main thread. not 10%, like multiple slower. i am not sure yet if it is the code run time or time for dispatch to trigger. trying to focus in on what is the problem on our side and get some metrics, but if anyone has seen this issue, it might be useful to compare notes.
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1.2k
May ’23
new mac catalyst app, "app is incompatible with the current version of macOS"
hi all, i have made mac catalyst apps before and they were fine. now i try to make a new one (converting an iOS app over to catalyst) in xcode14.2 and i get the above error msg when trying to run on mac intel locally. however, i seem to have the mac os deployment targets set to a slightly older version of macos than i have installed on the run target mac. what is new in catalyst setup that i am missing? the setup seems a little different in the xcode UI than before so maybe there are some new hidden tricks to get this to work?
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685
Apr ’23
AVAssetReader "cannot decode" error for ProRes icloud video sync'd to non ProRes phone
hi all, getting an error reading ProRes vid on a non ProRes phone (12 mini) video was sync'd via icloud to the 12mini video plays ok in the apple photos app, but our asset reader is puking on it the same code works ok on the phone where the pro res video was made AVAssetReader * asset_reader = [[AVAssetReader alloc] initWithAsset:asset error:&error]; NSMutableDictionary* dictionary = [[NSMutableDictionary alloc] init]; [dictionary setObject:[NSNumber numberWithInt:/*kCVPixelFormatType_420YpCbCr8BiPlanarFullRange*/ kCVPixelFormatType_32BGRA] forKey:(NSString*)kCVPixelBufferPixelFormatTypeKey]; AVAssetReaderTrackOutput* asset_reader_output = [[AVAssetReaderTrackOutput alloc] initWithTrack:video_track outputSettings:dictionary]; [asset_reader addOutput:asset_reader_output]; [asset_reader startReading]; asset reader error code is: (NSInteger) $1 = -11833 localized msg = "Cannot Decode" note that i had tried a different recommended pixel format instead of the older BGRA we wer using (commented out). didn't work either. this is older code. anyone see this, know of workarounds?
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961
Jan ’23
icloud media retrv'l ... speed up?
we are doing something like this to get photo data from photo kit (see code) however, when the media is on iCloud, it seems like it is trying to pull the highest res possible (e.g. for RAW photos or ProRes vid maybe). which can take a lonnnng time if you are on a cellular net. this completely bogs down the app. is there a recommended way to get a normal res media item from this (e.g. not pull the highest res from icloud?); either a standard jpeg or a lower res movie? [phasset requestContentEditingInputWithOptions:options                                          completionHandler:^(PHContentEditingInput *contentEditingInput, NSDictionary *infoin) {
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1.2k
Jan ’23
[PHAsset fetchAssetsInAssetCollection: ... ] notably slower in ios16+ ?
has anyone noticed this query being a lot slower in newer iOS versions? we try to get counts of all assets in all asset collections (folders) to display in a selector table for the user to select an album to work with, and it seems to be lagging recently when there are a lot of assets involved maybe some of the assets are on iCloud? not sure. getting user reports of speed issues. we are trying to set .fetchLimit in fetch options to a number like 1000 or so to keep it from scanning all assets as a test to see if we get fewer complaints, but will have to wait for user feedback and our tracking metrics to see if it speeds up or not on real user devices with lots of photos. regarding counts, we are seeing users with 100k+ assets on a device (photos & videos).
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974
Nov ’22
UITabBarItem image control when in the "More..." overflow VC
hi all, we are using the UITabBarItem (s) with custom images, works great when the tab bar items are actually in the bottom tab bar, using the special mode of [... imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]; however, when we have overflow tabs that show in the More... view controller, the tab bar images show as a solid rectangle any tricks to solve this? see attached, bottom tab is great, but the top More... controller ... not so great
Topic: UI Frameworks SubTopic: UIKit Tags:
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815
Oct ’22
header path search rules and Xcode settings for ObjC
sometimes i get external modules to integrate using the <path/file.h> form for header file paths (even tho they are not apple framework or system files). sometimes i get them with the "path/file.h" form. sometimes they work. sometimes they don't. there are many header file settings in the xcode build settings. i count at least 11 settings for header search paths in xcode. there may be more. does anyone have a definitive Apple guide to all this complexity with respect to ObjC headers in one place? every time there are header file search problems, it seems to involve a random process of changing various settings until everything builds, but that seems to be the wrong way. it also takes a long time.
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832
Oct ’22
set background color of [UIImage systemImageNamed: ... ]
hello all, any idea if you can set the background color of one of these new SFSymbol images? i tried this paletteColors: method, it seems to take only the first color and use it as the foreground color   UIImageSymbolConfiguration * config =         [UIImageSymbolConfiguration configurationWithPaletteColors:@[[UIColor blueColor], [UIColor redColor]]];     UIImage * confMatImageSel = [UIImage systemImageNamed:@"square.grid.2x2"             withConfiguration:config];
Topic: Design SubTopic: General Tags:
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2.4k
Oct ’22
macos app non-store distribution question / hardened runtime
i would like to code sign a mac app but leave out the hardened runtime business because some third party libraries (python-related if it is important) are causing troubles with that. e.g. the benefit of code signing is that it keeps people from modifying the app contents. this is of course a benefit even without the hardened runtime. is there a way to do this any more? it seems like it used to be an option. i realize this requires non app store distribution.
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1k
Oct ’22