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A Summary of the WWDC25 Group Lab

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WeatherKit textual weather summary?
Is there a way out of the WeatherKit REST API to get a textual summary of the weather like the iPhone app from Apple shows? Right now the local forecast on the iPhone app says Sunny conditions from 7pm-8pm, with partly cloudy conditions expected at 8PM. Is this something the app rolls on it's own or is there a attribute-value pair in one of the returned JSON datasets that has this text. It's not in the forecastDaily dataset. *Humorous that it says Sunny conditions from 7pm-8pm because that's about the time the sun is setting. That forecast was from 1PM.
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May ’24
Reply to XCode reverts CoreData's .xccurrentversion
I had been too swamped to be able to continue this conversation because of the highly prioritized work related to WWDC25, and after that I lost the track of this thread. Sorry for that. Thanks to another developer reaching out via DTS with the same issue, I am now picking up this thread, which hopefully is not too late. I'd like to confirm that I can now reproduce the issue. As folks have mentioned, the issue happens only in an Xcode project using folders, not groups. I've always used groups which helps me better organize files logically, and so had not seen the issue before. Xcode 26 Beta 6 doesn't fix the issue. Before the issue is fixed from the system side, the workarounds folks mentioned, like using groups instead or giving the new model version a name alphabetically ordered to the last, sound good to me. Best, —— Ziqiao Chen  Worldwide Developer Relations.
Aug ’25
From DarkSky to WeatherKit, summary and icon fields
Hello, I'm migrating my app to use WeatherKit from Dark Sky, and although most of the data fields is transformable, there are a few that are missing from WeatherKit's response; for example, summary and icon for daily/hourly/current weather data blocks. I'm curious, what workarounds have people used for these fields that can bridge that gap? My app relies on these values to render icons. Thank you!
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Mar ’23
Summary Format for C++ templated union type
I'm working with the glm library (http://glm.g-truc.net/0.9.8/index.html) for vector math - unfortunately, the underlying data types have very unfriendly representations in the lldb debugger summary format view. For example, a simple array of vec2 data type (which is a typedef for glm::tvec2<float, glm::precision::highp>) gets the following view in the debugger:http://imgur.com/a/P8IczI was able to use the Edit Summary Format functionality to make a nice view for vec2 -- e.g., ({$VAR.x},{$VAR.y}) -- when the debugger recognizes it as a vec2 (e.g., in my code). But when the debugger sees it as glm::tvec2<float, glm::precision::highp> (e.g., inside library code) editing the summary format doesn't seem to work. Instead of a nice human readable summary, I get Summary UnavailableI edited the plist in /Library/Developer/Xcode/UserData/Debugger/CustomDataFormatters to see what happened:<SummaryFormatter formatString = ({$VAR.x},{$VAR.y}) type = glm::tvec2&a
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Mar ’17
Xcode Build Timing summary not visible
HiI'm trying to use Xcode's Build With Timing Summary feature. It kicks off a build, and I can see the new build in the Build Reports navigator, but when I look through All Messages in the build results, there is Timing Summary information. It just says Build Success - <date> - 75 seconds, but there isn't a breakdown of the timing results.My target builds an iOS app with many extensions, so I can't post the whole logs here. But is there any reason why I can't find the timing results? I do have that older Xcode flag 'ShowBuildOperationDuration' which still works, but only gives the same overall build summary time, not a breakdown.
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Apr ’20
Installer Lab Notes
There is a way to get the OS installer into an installer packageBuild installer package which installs Install OS X.appComponents:Install 10.12.app (added to Scripts directory or installed somewhere on the filesystem.)postinstall scriptThe command line tool to call is startosinstallpostinstall script would call startosinstall and install Install 10.12.app using the startosinstall tool.Note: The startosinstall tool uses the same logic that the GUI app.Usage: startosinstall --applicationpath <install os x.app path> --volume <target volume path> Arguments --volume, a path to the target volume. --applicationpath, a path to copy of the OS installer application to start the install with. --license, prints the user license agreement only. --agreetolicense, agree to license the license you printed with --license. --rebootdelay, how long to delay the reboot at the end of preparing. This delay is in seconds and has a maximum of 300 (5 minutes). --pidtosignal, Specify a PID to which to send SIGUSR1 upon comp
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Jun ’16