Today, after installing Xcode 4 with the 4.3 SDK, I attempted to launch my application. However, the application will build and the iOS Simulator will pop up, but I get a message in the window in Xcode that says "Attaching to YourApp" which stays there indefinitely. How can this problem be fixed?
I had the same problem, that is, when I launched my application in the simulator, Xcode was hung waiting for the simulator to start. The simulator showed a black screen - nothing at all.
Note this is a project that ran fine on Xcode 3 and is the exact set of files used to build the application that is currently for sale at the App Store.
Okay, so here's the underlying problem, and my solution:
My application name was "ultimateTimer.app", as seen in Xcode under the Products folder. However, this was NOT the name in the project file.
Here's how to found out:
Click on your project in Xcode (it's usually at the top, e.g. mine is called ultimateTimer.xcodeproj). Under "Build Settings" tab, look for the "Packaging" area and specifically for the "Product Name" variable. Under Product Name, I had three entries:
Debug
Distribution
Release
Under Debug, it had the value "TalkUltimateTimer" which was an old name of mine. When I changed this to "ultimateTimer" to match the "ultimateTimer.app" as above, I found the Xcode attached to the simulator correctly.
This happened for me for iPhone applications. I opened the simulator myself and switched the device to iPhone Retina Display and from then on it worked. I tried switching back, but it didn't work again, so I have had to keep it on the Retina Display simulator, and if I need to test non-Retina Display I'll use the iPad simulator.
I skimmed the post and these seem to be the two solutions thus far:
I think I figured out the problem:
I went to 'Edit Schemes', and for some reason, the scheme I was using was pointing at BumpDev.app as the executable instead of bumpdev.app. Changing this made things work. Perhaps there is an issue when converting from xc3 proj files?
Anyways, the app now boots in the simulator. Yay!
And the other solution in that post is:
Did your project by any chance have a folder reference with images in it?
For me the problem only happens when I have a folder reference in the project. When I remove the folder reference and instead add the folder as a group, clean the project, and hit launch things work fine. In the "Copy to Bundle" phase each image is then listed individually, whereas when I had a folder reference, the whole folder was listed.
This took me a really long time to figure out. It was quite frustrating, but I'm glad I have a workaround until the bug is fixed.
I had the same problem after swapping the mouse for a new one. restarting my iMac resolved the issue.
I just upgraded to Xcode 4.3.2 and had the same issue with new projects. After poking around and comparing projects, I found out that new projects were set to the LLDB dbugger and the projects that worked were using GDB.
After changing the debugger for the new project to GDB, it worked. I am yet to research what the differences are, but at least I can now run my new projects.
Ensure you are starting a proper scheme.
I. e. when using CocoaPods, running Pods scheme would not start emulator.
It's a known issue. Have a look at this thread in the official forum.
Hey, update Xcode to 4.0.2. Problem solved :)
I had the same problem, I tried every solution here, but no works. Finally, after I rebooted my computer, the problem was gone.
Restarting the simulator worked for me
Related
Yesterday i was testing my app in the iOS simulator and everything was working fine. I then decided to run the app on my iPhone and i got the error unable to install application, Unknown error occurred this has happened before so I cleaned my build folder (as this has fixed this issue before) however, the same error occurred. I then ran the app in the iOS simulator again and now i get the error Unable to run app in Simulator, An error was encountered while running (Domain = LaunchServicesError, Code = 0). I find this very weird as i didn't change anything besides trying to run the app on my iPhone. I have tried every solution given on this post and still no luck.
I'm sorry if my question doesn't contain much detail but as I said I didn't change anything and it was building and running fine a minute before plugging in my iPhone and trying to run it on there.
Any help would be much appreciated.
edit
I tried running other projects (with and without extensions) and they are working on both simulator and iPhone, therefore the problem must be within my project. (my project does have a today extension)
In that kind of cases I usually :
Product > Clean
Close xCode
Delete the Derived Data (in ~/Library/Developer/Xcode/DerivedData subfolders)
Delete the app on the iPhone
Reboot the iPhone
Restart and rebuild
I had this problem. In my case, it was caused by the Build value being blank. After putting a value there, and resetting the simulator once more, the issue went away.
I had the same problem and checking the system log carefully helped me to identify a coliding library that was causing this error. You can also check this answer if you are using extensions.
Generally it means there is a problem with the build, it may be due to old cache (solved by a clean build) or a project definition error (missing library, bad definition in info.plist, etc).
In my case it happened only on iOS 8, turns out that my widget had the wrong bundle ID.
I'm developing a new application for Iphone, using Xcode (Version 4.6 (4H127)) and the iPhone 6.1 simulator (Versión 6.0 (369.2)).
At the beginning everything was great: every time I pressed the "run" button, the application was loaded into the simulator and I was able to test it. But sometimes it is not working: when I press the run button, I only get the message "Finished running on iPhone 6.1 Simulator". The code successfully compiles (only minor warnings).
The main problem is that when I get this message, the only way I can use the simulator again (in this project, the rest of the xcode projects seems to work properly) is by starting a new project and adding every file to it.
I've tried to delete de derived data, restart de simulator, restart de computer, etc. Even I made a snapshot when the simulator was working, but when I go back to the snapshot state, the simulator still don't work.
What can I do? Any idea?
1.Manually launch the iOS Simulator.
2.From the "iOS Simulator" menu, click "Reset content and settings",
3.Close and rebuild your app.
This problem may arise when you have problems with your project's plist's target membership. Select your info plist file from project navigator folder structure's Supporting Files, go to interface builder pane(Utilities Section under View in Top Bar), then look for Target Membership in File Inspector pane, if it is checked, uncheck it. Clean & Build, Hope it helps.
Library > Application Support > iPhone Simulator > 6.1 (or whichever you're using) > Applications > Your Application and delete it.
Rebuild your app and relaunch.
I had the same problem, with the same "failed to attach to process ID 0" (I actually didn't notice that error until I saw that you said you had that error). In one of my projects the 6.0 simulator didn't work, but works in my other projects. Also my 5.1 simulator worked.
What worked for me was based off this other answer for a similar question: https://stackoverflow.com/a/12423912/159758
Go to the Product menu and find the Edit Scheme menu there.
While in Edit Scheme window, select the "Run" option on the left hand side of the screen and then on the right hand side, change the debugger from LLDB to GDB.
Run the project, this worked in the simulator.
Then Go back to the Edit Scheme and set back to LLDB.
I noticed you've tried setting the debugger to GDB and not a debugger, but thought I'd mention what helped me, since you're question helped me get to the bottom of my problem (i.e. seeing the "failed to attach to process ID 0" message).
This problem may arise due to presence of more than one info.plist file.
I also faced a similar problem, and eventually found that while adding some resource file from another project I also added its info.plist file.
Once check your Build phases> Copy Bundle Resources, whether another info.plist file exist there or not. If exists then delete it, clean the project and rebuild it.
Hope it helps.....
I ran into the same issue and somehow was able to fix it and almost immediately it went back to being broken. I can tell what broke it though.
I added a couple of folders (folder references) with files in them to the copy bundle resources section. That broke it. If I recall right, I had removed both of those and was messing around with DeploymentTarget. I might have reset the simulator earlier. Regardless, it started working. So,
there is hope for a fix
this thing is caused by folder resources that need to be copied into the bundle
Updated:
I was able to get it working again. Here is what I did..
- Cleared out the derived data folder
- Shut down the simulator app
- Also cleared the deployment in the simulator folders (Users/XXXXXX/Library/Application Support/iPhone simulator/6.1/Applications)
Since last time adding the folders to the bundle caused it to lock up, I tried it step by step adding one folder to the bundle and trying. Turns out one of my folders was named Resources and it dawned on me that particular name could potentially be colliding with something else the app looks for. So I renamed that folder to Res and tried it. It works now.
So there you have it.. Follow the steps above to get out of the problem.
Avoid copying folders called Resources to your bundle.
I've imported an iPhone app that I have developed for iOS and am now maintaining it. I've came across a couple of bugs when trying to add to the iPhone's calendar, which I'm happy to try and sort out myself with a bit of debugging.
One problem is that when I go to run the application on the iPhone simulator, it seems to run an older version of the app than the one I am running. I've removed and added another button since then and the old button is still showing when I run it in the simulator. However, when I compile and run this on a device, it loads the correct version and displays the correct version number in the 'about' view.
But... my main problem is that it doesn't seem to debug on the device properly. The app actually works fine except for the calendar problems, but if I put a few breakpoints in so I can see exactly where this is going wrong, it just doesn't seem to step through! The app pauses, and Xcode says the app has paused! I can press step over and continue execution etc and it appears to work, but I can't see it stepping over the code, nor can I hover over variables to see their values.
I've tried reinstalling Xcode multiple times (I did have a problem installing an older version, so I had to wait until the next version was available before Xcode would install).
The stress is: Today is my last day at work, and I'd really like to get this app ready for iOS 5 before I leave.
Has anyone seen these symptoms before? Is there a debug setting that I've missed? Or is it a corrupted installation?
I wish I could help people a bit with more information, but I don't even know where to start looking here. Any code I can post? any settings? (not too familiar with this, I'm a .NET guy usually).
Thanks!
Sorry you're going through a tough moment there Connell; as you said you're not too familiar with all this, I'm laying down a few steps which might help you out. Some are pretty basic, yes, but I've resolved to these steps myself several times when I've encountered similar scenarios;
If you're testing on the simulator, do a 'Reset Content and Settings' from the 'iOS Simulator' main menu. This will remove all old data and settings and give you a clean start.
Do a 'Clean All Targets' from the Build menu. Then go to your physical project folder and delete the Build folder from it altogether before starting to build again.
Restart both XCode and the Simulator (and your Mac too if possible)
Make sure the mode is set to Debug and not Release or Distribution
Even on the device, remove the old app before putting the new one in, and restart it for good measure.
Delete all Provisioning Profiles from the device and install just the one you need.
On the code;
I've noted that the app appears to 'pause' like this a couple of times when I had accidentally created an infinite loop in the code. Double check to see whether there's something which may cause this.
Unless you haven't already done so, throw an NSLog or two in there to see if its really not being executed beyond the breakpoint.
I've had the exact same problem with a project that I started on xcode 3 and then switched to xcode 4. What fixed it for me was changing the compiler in the project settings.
The default compiler up to xcode 3 was gcc, while the default compiler on xcode 4 is LLVM gcc.
Now, I don't know exactly what's the issue that gdb could have with LLVM gcc, but switching the compiler back to gcc in my project settings and doing a clean build fixed my debugging issues.
Might be worth a try.
Have you checked which debugger is being used GDB or LLDB? Select Edit Scheme from the Product menu, and see what the Debugger setting is under the Debug scheme. You could try switching between GDB, LLDB, and None and running in between.
Today has been a headache - first my upgrade to xcode 3.1.3 trashed all my certs/provisions. After two attempts, I got them fixed.
Now, I'm dealing with the issue in the subject, no console output.
Absolutlely nothing is getting printed to the console - No startup info, not when I "print" a variable from xcode when stopped on a breakpoint,
not NSLog() either.
Nothing.
I've restarted my Mac, restarted Xcode, etc. I've made it so clears the console and opens it on project build. I had GDB log to a file,
and that works, so the plumbing is cool. Its just the console itself is dead.
Image: (and this is after attempting to print the contents of a variable while the app is running)
http://mr-sk.com/iphone/screen-capture-2.png
It doesn't seem to matter if I'm on the device or the simulator ...
That looks like the split bar is pinned all the way to the right side. Look for the dimple and drag it back toward the right.
I'd also try asking in the iPhone developers portal forum, since you can ask about beta versions of stuff there...
This is an older post, but I just recently ran into this with 3.2.3, so if someone happens upon this the answer by cdespinosa was spot on, however many of us "noobs" may not know exactly where to find those files, so just in case...
Go to Finder, find the folder where you have your .xcodeproject file and right click on it and click on show contents of this package. When the new window appears, move the .perspective, .mode, .pbxuser files to trash. (Make sure XCode is closed when you do this...I happened to do this while the project was open like an idiot and didn't think it worked the first time)
Now reopen xcode and your project. Your console should now be fixed.
Something really weird is going on with Xcode and an iPhone project I'm working on, when I'm building for the simulator, the project has 2 active executables (MyApp - iPhone Simulator (2.0) and MyApp - iPhone Simulator (2.1)) Almost all of the time, I want to use the the 2.1 active executable, but Xcode will occasionally silently change to the 2.0 one.
There doesn't seem to be any pattern to this or any trigger that I can notice. Googling has found a couple of people out there who are having the same problem, but no solutions.
Help me stackoverflow-kenobi! You're my only hope!
Ok, it was a bug. The good news: it's fixed in the fresh new 2.2 SDK.
That is weird -- I've been doing iPhone/XCode development for a while, now, and never seen anything like that.
Are you absolutely certain that you're not poking around some place that's causing the change?
Might you have a corrupt XCode or .xcodeproj? If it persists, I'd try re-creating my project and, if that didn't help, reinstalling XCode.
Very strange, indeed...!
I have the same problem. I need to set the active Executable to 2.1 for openAL to work. The pattern I observed is that it switches back everytime I switch to export to the device. Isn't that what happens with you?
I've seen the issue commented a couple of times on the official iphone dev forum, but no solutions. Looks like a bug.
So.. why are you actually doing that? It is probably better, given the nature of the iPhone (with multiple frameworks for multiple architectures), to set up different Targets for your various projects. The executable produced will be the result of the build phases for your targets.