Whilst using Xcode 4.0 and trying to debug and see what value is held in what variable - or see what objects are in an array etc, I always seem to get "Summary Unavailable" or "Invalid Summary".
The problem seems much like the one in 3.2.6 if you built and ran a release version with the symbols stripped.
Any chance that any one knows where I am going wrong, or what the resolution is
For years things worked smoothly - then Apple stepped in - again.
Thanks
You're not going wrong, Xcode 4 is. This problem is pretty common, unfortunately. Report it at http://bugreport.apple.com/ and hope for the best.
In the meantime you can inspect variables using the console, which appears at the bottom of Xcode 4's window during debugging. If you have an object "myObj", you can inspect it in the console by typing "po myObj". It's a lot less convenient but it's better than not getting the information at all.
You can also try changing the "Summary Format" in the GDB window. Try something like {(NSString *)[$VAR description]}:s as the Summary format - this works for NSManagedObject derived objects.
While waiting for Apple to fix Xcode 4 you can try using "Print Description", which prints the value to console.
Start your app up in debug
IN XCODE 4.02, go to Product/Debug/Shared Libraries
The window that appears tells you which dynamicLibs are loaded
Scroll down until you see "libXcodeDebuggerSupport.dylib
Click the "Load" button, and then "Done"
After stopping on a breakpoint, the contents of a string should be printed in blue after the object's address.
Hope this helps!
This happened to me upon upgrade to xCode 4.3.1.
I found that editting the Run/Debug scheme and changing the Debugger setting in the Info tab from LLDB to GDB fixed the problem.
I had that problem. If you explicitly declare the ivars in your h file, they should show up in the debugger as expected.
#synthesize will create the proper ivers for you, but it does not always make them accessible in the debugger endless you use the command line po to look at them.
I have battled this issue for quite a while and I finally figured out the issue. I have several build configurations in my application (Debug, Release, UAT). When I hit 'Run' on my main scheme then I am using the 'UAT' configuration -- not 'Debug'. I realized that I was stripping debug symbols for my 'UAT' and 'Release' configurations. I simply modified my build settings to not strip debug symbols for the 'UAT' build configuration and voila, all my symbols are available again.
I am using XCode 4.5.1, but have seen this issue for quite a while on various projects. I assume that most of my projects use the 'Debug' build configuration by default and therefore were working fine. Only when I started getting fancy with my schemes and build configurations did I come across this issue.
Related
I am using Unity as a library for SwiftUI quite a while now. However when updating to the newest iOS version (16.1) it stopped working. Compiling runs without a problem but during runtime I get an error when Unity is starting:
in:
I even started a completely new project with Unity included to SwiftUI and get the same error. As this is some kind of assembler code and I certainly do not know how to read it I don't really know where I have to start searching.
In the console I get: "warning: UnityFramework was compiled with optimization - stepping may behave oddly; variables may not be available." I tried several ways to turn off optimization as described in related questions which did not work. When unchecking "Debug" in the scheme options the project starts normally
A similar thing happened to me. I'm not entirely sure if it's the same problem but in the console, I got a message saying UnityFramework is running optimized and may behave oddly. Unfortunately, I've tried a couple of ways to disable optimization but I've yet to find a solution.
For now, I'm able to bypass this error by disabling the debugger entirely. In order to do this, you have to go to Product -> Scheme -> Edit Scheme and uncheck debug executable.
I'm not sure if this will work for you but I figured it'd be worth a shot!
There is a new autocomplete in Xcode. Probably might be useful because it checks not only beginning of names etc. But I found that very often it doesn't find a class name or a const name at all etc. I need to type in entire name by myself. Over all I found it makes my life harder and coding more time consuming. Is there a way to switch to the old way it used to work?
Xcode 7.3.1
In Xcode > Preferences > Text Editing
uncheck Enable type-over completions
restart Xcode
It seems that clearing the checkbox "Enable type-over completions" in XCode -> Preferences -> Text Editing does the trick. At least in my case autocompletion fell back to a sort of old way, so it could autocomplete the class name that I had to type in manually before that.
This is by no means an adequate solution, BUT it has allowed me to (barely) maintain my sanity the past few days:
After every build, you need to trash your Derived Data folder. You can find this folder in Xcode > Preferences > Locations > Derived Data. Just trash the whole thing and it'll kick off a re-indexing step that should restore proper autocomplete functionality.
Unfortunately, I've found that once I build, the autocomplete behavior reverts to its broken state.
just open Xcode derived data folder and delete the folder
/Users/yourUserName/Library/Developer/Xcode/DerivedData
then restart Xcode, now autocompletion works like a charm
I have the impression that some 'parts' of autocompletion simply fail after a while. I use to restart the Mac to get it back working. But sometimes it fails quite soon again.
Maybe the answer of #Alex Bykov combined with a restart will do the trick.
Anyway: auto-completion of Xcode always was crap. AppCode used to get it much better. Unfortunately not yet with swift.
Closed Xcode, opened Xcode, let it index, it worked.
it doesn't find a class name
As a work-around, you can try to press
Command + Shift + K and Command + B
Several times，it works temporarily.
Xcode 7.3.1
I will share another posible reason, that after couple of days we found out. We have multiple schemes, and in one of them, the bridging header was importing a file that didn't exist anymore. So, it didn't break while compiling and running (the header belongs to another scheme) but it caused the autocompletion to break (couldn't find any objective-c class).
Hope it would help someone!
After having tried different methods:
Delete Derived Data
Switching Module Enabled off in Build Settings
Full Clean
Relaunch
Only this worked:
Find any commented out (/* abc */) code after #end in your files and delete.
Credit to Max_B:
https://forums.developer.apple.com/thread/7439
In my case, other projects were auto-completing correctly. If all your projects fail to correctly predict code, then it might be a different issue, and the other answers might work.
I ran into this issue while trying to make an OS X app and I was able to fix this issue by making sure that the Xcode 7.3 documentation and the OS X 10.11.4 documentation was actually downloaded. Doing this fully restored my autocomplete functionality. My full instructions are below as well as in my answer to a similar question: https://stackoverflow.com/a/39420664/3444925
I had this problem myself and after looking through all the other similar questions & answers about this, I couldn't find a solution. However, I finally found what worked for me.
Go to Xcode -> Preferences -> Components. There you will probably find a screen that looks like the following:
This shows that the documentation has not has not been downloaded and therefore, any attempts to re-index or re-build the application without downloading the documentation would prevent you from being able to use the autocompletion functionality.
Once I downloaded the Xcode 7.3 Documentation and the OSX 10.11.4 Documentation, this was enough for me to get the autocomplete functionality back (I was trying to build an OS X app, so feel free to download as much documentation as is relevant for you).
I didn't run into this until I created a couple of new class files. Other classes worked fine, but autocomplete would NOT work for anything in the new files...
FIX (for me) - I had to add those files to ALL of my targets, including the unit test targets even though I wasn't using them yet.
I've taken a screenshot of the compiler inconsistencies that I have been getting when creating new ViewControllers in my current project.
In this example, the debugger shows a different value for my variables 'kim', 'fakekim', and 'blah' from my log output (which shows the correct values). The debugger consistently shows the next instance variable obtaining the current instance variable's value ('fakekim' is assigned the value that 'kim' is supposed to have).
The issue seems to be project-specific. I've been able to reproduce the issue by importing my project on another Mac. However, if I create a new project, the debugger works fine. Was hoping to figure out the issue to prevent this from happening in the future.
Thanks for your help, StackOverflow community!
Edit: Larger screenshot image: http://i.imgur.com/QfZme.png
This was a (very annoying) bug with LLDB in Xcode 4.3. It has been fixed in 4.3.2.
Probably an Xcode bug. Try dragging the .xcuserstate file from you working project to your real one, and see whether that fixes it.
You could also try a clean build (shift-command-k).
I'm trying to create an ad-hoc build of an iPhone app for beta testing.
On their end, they're seeing an error like the following:
"The info.plist for application at xxx specifies a CFBundleExecutable of (null), which does not exist"
Here is an excerpt from the actual info.plist:
<key>CFBundleExecutable</key>
<string>${EXECUTABLE_NAME}</string>
And it clearly is not null.
What am I doing wrong here?
The WORKING SOLUTION is this (and only this):
In Xcode, choose “Executables” from the project hierarchy. Click your project executable then press Command-I. Choose the General tab and set the working directory to “Build Products directory”.
Found via BrainwashInc, who credits MacHackShack. I thought this valuable information was way too important to leave floating around on random blog.
It seems like sometimes XCode may flip this setting, as I suddenly started having this issue, and the fix above repaired it. Changing it back to "project directory" reproduces the issue for me, every time.
I also had to restart XCode to get the debugger to work once this fix installed the app, that may be unrelated.
I don't think there is ONE working solution to this. I found several solutions that doesn't work for me. At the end, I did find one solution.
By deleting whatever I had in the "Producs" folder in xCode I managed to get it working. I am using xCode 3.2.1.
Note: I did the change regarding "Build Products directory” above as well, perhaps both solutions needs to be implemented, up to you to try it out.
This is, to say the least, quite anoying. As a beginner, things are complicated enough without bugs in the SDK...
Hope this will help someone out there!
Cheers
It sounds like you're looking at the info.plist in the project not the built product.
The '${EXECUTABLE_NAME}' in the project info.plist is just a place holder for a variable in the build script. You need to look at the info.plist in your built product to see what is listed there. It sounds like for some reason, the build script is not populating the field as it should.
You might actually check that the contents of the application package actually has an executable. Sounds weird I know but a few years ago I mucked about with my build setting son a project and ended up with a product without an executable. Everything else, the package, resources, string files etc was there just no actual program.
This is a know issue of SDK:
Changing an iPhone Executable's working directory from “Build Products directory” may cause the application not to install properly with the error message “The Info.plist for application at (null) specifies a CFBundleExecutable of (null), which does not exist.”
as you can see here:
http://developer.apple.com/iphone/library/releasenotes/General/RN-iPhoneSDK-3/index.html
For me, it worked to change the working directory.
I created the problem deleting by hand the build directory.
My iphone app randomly received this message. I know certain it is memory release problem. However what is the best way to find which object leads this problem. Here are what I have tried
Use Instrument Leak and
ObjectAllocation Trace. Dont saw any
help to know which object have this
problem
Put NSZombieEnabled=YES and project executive ... Dont saw any
help either
Put NSLog everywhere but the EXE_BAD_ACCESS just appear anywhere.
in the debuger, just saw the code
happened in the assembly. like
objc-msg send.
review code many times and read memory management a lot time
and research online a lot time. but
no surprise.
Is there a completed solution to figure out this problem easily. I am a previous Visual C++ programmer, I deal with memory management with years and it is easy to debug and figure out in Visual C++.
If you couldn't see any helpful debug info, I would suggest you find all the places that you are doing a release. It is most likely the case that you have released something that did not need to be released. Code would help us in tracing the issue with you.
As Juan noted, the first stop is the Debugger - what does the debug window give for a stack trace when the app crashes? You should be able to see the line it crashed on... you said in a comment to one response that you saw the crash happen around the lines:
CGPDFDocumnetRef docA=CGPDFDocumentCreatWithURL(myurl);
CGPDFDocumnetRef docB=CGPDFDocumentCreatWithURL(myurl);
Are you really using the same URL object for both calls? Which line is it exactly?
It could be something around the way you make use of the CGPDFDocumentRef, you can find example code how Apple uses them in the QuartzDemo project, file "QuartzImageDrawing.m" (you can find the demo project from the developer portal or embedded in the iPhone documentation with XCode).
XCode is actually pretty powerful, but it does things differently from other IDE's.
In addition to Erich answer, I'd want to add go backward. Start with the most recently added release and work from there.
I ran in to this and it turned out I was releasing an auto-released object that was returned from a convenience method built in to the Cocoa-Touch framework. My problem was as Erich described -- I released this auto-released object. When the system attempted to release it, the program gave the error you are describing.
Regards,Frank
The best way to know what happend is using the xCode Debbuger, give it a try.
You will also receive the message when you don't pass enough parameters to a variable argument method. For example having a NSLog statement like this: NSLog(#"Hello %#");
To check what the error might be
Use NSZombieEnabled.
To activate the NSZombieEnabled facility in your application:
Choose Project > Edit Active Executable to open the executable Info window.
Click Arguments.
Click the add (+) button in the “Variables to be set in the environment” section.
Enter NSZombieEnabled in the Name column and YES in the Value column.
Make sure that the checkmark for the NSZombieEnabled entry is selected.
found this on iPhoneSDK