I want to develop based on iOS and I did some verifications based on xCode Instruments firstly. But there are some confusions on the verification results. I did the test to open a file in 1KB size. The analysis results from xCode Instruments is as followings: In "Disk Usage", it shows that there are 4KB "Page In" operations. (Please refer to P1.png attached) In "Virtual Memory Trace", it shows totally 4-times of "File Backed Page In" operations, and each operation size is 16K. (Please refer to P2.png & P3.png attached) That is, Size of "File Backed Page In" is around 4*16K=64KB. I did similar tests on different size of files. Every time the values of "Disk Usage"->"Page In" and "Virtual Memory Trace"->"File Backed Page In" are not matched (In this example, the two results are 4KB vs. 64KB). I think that both values represent disk IO size of the process and they should be in the same value for the same process. Why the values are different? What are the differences between this two options in xCode Instrument tool? Thanks a lot.

I'd like to add a short script that runs clang-format upon trying to save a file in Xcode project. the script will do the following command : #!/bin/zsh /usr/local/bin/clang-format -i <saved_file> Does Xcode support this feature (in visual studio it's called format-on-save :  https://code.visualstudio.com/updates/v1_6#_format-on-save

Are there any active Facebook or discord groups? Sometime appconnect down and would like to ask whether other developer faces the same issue.

I am trying to subtract one double value with another but I am getting an invalid result. The result for 4.15 - 0.2 works but fails for 4.14 and 4.13.

can I use chrome and Microsoft edge's extension on safari ??

hi, i wan't debug my project. but i get this error when installl my game . i try change my device . but get same error. Unable to install "SpeedGame" Domain: com.apple.dt.MobileDeviceErrorDomain Code: -402620415 User Info: {   IDERunOperationFailingWorker = IDEInstalliPhoneLauncher; } An unknown error has occurred. Domain: com.apple.dt.MobileDeviceErrorDomain Code: -402620415 User Info: {   DVTRadarComponentKey = 280331;   MobileDeviceErrorCode = "(0xE8008001)";   "com.apple.dtdevicekit.stacktrace" = ( 0  DTDeviceKitBase           0x0000000125473316 DTDKCreateNSErrorFromAMDErrorCode + 220 1  DTDeviceKitBase           0x00000001254b184a __90-[DTDKMobileDeviceToken installApplicationBundleAtPath:withOptions:andError:withCallback:]_block_invoke + 155 2  DVTFoundation            0x000000010a699ed4 DVTInvokeWithStrongOwnership + 71 3  DTDeviceKitBase           0x00000001254b1594 -[DTDKMobileDeviceToken installApplicationBundleAtPath:withOptions:andError:withCallback:] + 1420 4  IDEiOSSupportCore          0x000000012532eb4e __118-[DVTiOSDevice(DVTiPhoneApplicationInstallation) processAppInstallSet:appUninstallSet:installOptions:completionBlock:]_block_invoke.292 + 3508 5  DVTFoundation            0x000000010a7cdc37 DVT_CALLING_CLIENT_BLOCK + 7 6  DVTFoundation            0x000000010a7cf3a3 __DVTDispatchAsync_block_invoke + 931 7  libdispatch.dylib          0x00007fff202bc623 _dispatch_call_block_and_release + 12 8  libdispatch.dylib          0x00007fff202bd806 _dispatch_client_callout + 8 9  libdispatch.dylib          0x00007fff202c35ea _dispatch_lane_serial_drain + 606 10 libdispatch.dylib          0x00007fff202c40ad _dispatch_lane_invoke + 366 11 libdispatch.dylib          0x00007fff202cdc0d _dispatch_workloop_worker_thread + 811 12 libsystem_pthread.dylib       0x00007fff2046445d _pthread_wqthread + 314 13 libsystem_pthread.dylib       0x00007fff2046342f start_wqthread + 15 ); } Analytics Event: com.apple.dt.IDERunOperationWorkerFinished : {   "device_model" = "iPad8,7";   "device_osBuild" = "15.0 (19A346)";   "device_platform" = "com.apple.platform.iphoneos";   "launchSession_schemeCommand" = Run;   "launchSession_state" = 1;   "launchSession_targetArch" = arm64;   "operation_duration_ms" = 413108;   "operation_errorCode" = "-402620415";   "operation_errorDomain" = "com.apple.dt.MobileDeviceErrorDomain";   "operation_errorWorker" = IDEInstalliPhoneLauncher;   "operation_name" = IDEiPhoneRunOperationWorkerGroup;   "param_consoleMode" = 0;   "param_debugger_attachToExtensions" = 0;   "param_debugger_attachToXPC" = 1;   "param_debugger_type" = 5;   "param_destination_isProxy" = 0;   "param_destination_platform" = "com.apple.platform.iphoneos";   "param_diag_MainThreadChecker_stopOnIssue" = 0;   "param_diag_MallocStackLogging_enableDuringAttach" = 0;   "param_diag_MallocStackLogging_enableForXPC" = 1;   "param_diag_allowLocationSimulation" = 1;   "param_diag_gpu_frameCapture_enable" = 0;   "param_diag_gpu_shaderValidation_enable" = 0;   "param_diag_gpu_validation_enable" = 0;   "param_diag_memoryGraphOnResourceException" = 0;   "param_diag_queueDebugging_enable" = 1;   "param_diag_runtimeProfile_generate" = 0;   "param_diag_sanitizer_asan_enable" = 0;   "param_diag_sanitizer_tsan_enable" = 0;   "param_diag_sanitizer_tsan_stopOnIssue" = 0;   "param_diag_sanitizer_ubsan_stopOnIssue" = 0;   "param_diag_showNonLocalizedStrings" = 0;   "param_diag_viewDebugging_enabled" = 1;   "param_diag_viewDebugging_insertDylibOnLaunch" = 1;   "param_install_style" = 0;   "param_launcher_UID" = 2;   "param_launcher_allowDeviceSensorReplayData" = 0;   "param_launcher_kind" = 0;   "param_launcher_style" = 0;   "param_launcher_substyle" = 0;   "param_runnable_appExtensionHostRunMode" = 0;   "param_runnable_productType" = "com.apple.product-type.application";   "param_runnable_swiftVersion" = "5.5";   "param_runnable_type" = 2;   "param_testing_launchedForTesting" = 0;   "param_testing_suppressSimulatorApp" = 0;   "param_testing_usingCLI" = 0;   "sdk_canonicalName" = "iphoneos15.0";   "sdk_osVersion" = "15.0";   "sdk_variant" = iphoneos; } System Information macOS Version 11.5.2 (Build 20G95) Xcode 13.0 (19234) (Build 13A233) Timestamp: 2021-10-22T10:39:21+08:00

Folks I'm trying to handle a linking problem coming out of linking a command line app to a c++ based library. But if I defined those methods inline with the class definition, no problem is there ... Problem shows -- Ld Build/Products/Debug/COMM_Srv normal x86_64     cd /Users/prokash.sinha/mysrc/C++/COMM_Srv     /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/clang++ -target x86_64-apple-macos11.3 -isysroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk -L/Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug -L/Users/prokash.sinha/mysrc/C++/COMM-BUS/Build/Products/Debug -F/Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug -filelist /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv.LinkFileList -Xlinker -object_path_lto -Xlinker /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv_lto.o -Xlinker -export_dynamic -Xlinker -no_deduplicate -stdlib=libc++ -v -lCOMM-BUS -Xlinker -dependency_info -Xlinker /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv_dependency_info.dat -o /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug/COMM_Srv Apple clang version 12.0.5 (clang-1205.0.22.11) Target: x86_64-apple-macos11.3 Thread model: posix InstalledDir: /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin  "/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ld" -demangle -lto_library /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/libLTO.dylib -dynamic -arch x86_64 -platform_version macos 11.3.0 11.3 -syslibroot /Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX11.3.sdk -o /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug/COMM_Srv -L/Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug -L/Users/prokash.sinha/mysrc/C++/COMM-BUS/Build/Products/Debug -filelist /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv.LinkFileList -object_path_lto /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv_lto.o -export_dynamic -no_deduplicate -lCOMM-BUS -dependency_info /Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Intermediates.noindex/COMM_Srv.build/Debug/COMM_Srv.build/Objects-normal/x86_64/COMM_Srv_dependency_info.dat -lc++ -lSystem /Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/lib/clang/12.0.5/lib/darwin/libclang_rt.osx.a -F/Users/prokash.sinha/mysrc/C++/COMM_Srv/Build/Products/Debug Undefined symbols for architecture x86_64:   "TCPStream::s_send(char*, long)", referenced from:       _main in main.o   "TCPStream::receive(char*, long)", referenced from:       _main in main.o ld: symbol(s) not found for architecture x86_64 clang: error: linker command failed with exit code 1 (use -v to see invocation) nm on the lib -- bash-3.2$ nm Products/Debug/libCOMM-BUS.dylib | grep TCPStream 0000000000003710 T __ZN9TCPStream6s_sendEPcl 00000000000037a0 T __ZN9TCPStream7receiveEPcl 0000000000003660 T __ZN9TCPStreamC1EiP11sockaddr_un 00000000000035a0 T __ZN9TCPStreamC2EiP11sockaddr_un 00000000000036f0 T __ZN9TCPStreamD1Ev 0000000000003690 T __ZN9TCPStreamD2Ev Constructor and Destructor defines are fine in the cpp file. The s_send and receive methods are not like one or two liners, so was trying to put them in C++ implementation files. Is there something more I need in terms of linking ? TIA -P

Hello everyone, On this M1 machine running macOS 12 Beta 6 (Monterey) I am unable to open File Merge if I configure Xcode 13 Beta 5 as the default Xcode (or if I try to start it from Spotlight and ensure it is the Xcode 13 Beta 5’s version). It always crash on startup. FileMerge crashes with the following error: Termination Reason: Namespace DYLD, Code 1 Library missing Library not loaded: @rpath/XcodeKit.framework/Versions/A/XcodeKit Referenced from: /Applications/Xcode-beta.app/Contents/PlugIns/IDESourceEditor.framework/Versions/A/IDESourceEditor If you have seen this issue as well, could you please raise a bug and reference Feedback ID: FB9609434 ? Note(s): I have both Xcode 12.5.1 and Xcode 13.0 Beta 5 installed on this machine and the only version of FileMerge that works is the Xcode 12.5.1 one. Kind Regards, Goffredo

tring to download version on xcode for catalina beta 11.5?DO you how to download the pack essential?please help

Hello, I wanna make my own version of the rainbow brackets extension for Xcode, but using swift. A good example of this extension would be Rainbow Brackets for Intellij. Also, if there is any good tutorial or course about this let me know.