I sometimes get a dialog in Xcode which states "Simulator in use." Restarting Xcode didn't help.
I have no Simulator Icon in the Taskbar to quit it and I have no running Simulator.
Is there any solution without rebooting?
I know some of these points to not adress your specific issue since you wrote restarting Xcode would not help you but I'll try to provide a full list of possible fixes for people who might stumble upon this one day.
Is the "Stop" Button in the left corner of Xcode still clickable ? ==> Click It
Try to reset contents & settings of iOS Simulator
Clean Build & Clean Project
Quit iOS Simulator (look at the Activity Monitor if there is still something running)
Restart Xcode
Restart Mac
This is all I can think of. For me most of the times I can resolve it by just restarting Xcode. As you wrote this does not work for you so maybe some of the other points of my list will help you.
Normally this happens when you terminate the iOS Simulator but not the debug session itself, which is why most of the times the "Stop" button in the left corner is clickable most of the times...
This dialog (and the state that triggers it) comes entirely from Xcode and not the simulator itself. This dialog will present itself if Xcode is already using the simulator from another workspace. For example, if you have three projects open at the same time and you do a Build&Run (eg: click "play") in one of them, you will get this dialog if you do a Build&Run in one of the other projects.
Related
I setup a bot to build the project then test on all the simulators. This has been working, but today the integration had 28 errors. Each said the same thing (but for each simulator device name):
Xcode cannot launch apps on the simulated device “Resizable iPad”, as
it is currently running an app on “iPhone 5s”. Only one simulated
device may be used at a time...
After manually running the bot I received no warnings. What could cause this? (I enjoy the success streak)
I only had one project running and had the same issue. Control Quit out of xcode and start it back up.
I had this same problem. I had multiple projects open and a different one still had
'Running appName on deviceName' displayed
Currently open projects can be accessed from the Window section on the toolbar on top. Pressing the Stop button (or the command from the Product Menu) on any projects that were still 'running' freed that particular device for other projects.
Alternatively, Rebooting Xcode works as it closes all projects.
See: https://stackoverflow.com/a/22267017/5172836
I encountered the same error today with the simulator.
The only way i've find is to reboot Xcode. After that the error disappeared and the application launch corectely in the simulator.
I don't know how the error has been originally produce, but Xcode is not a reliability model, so...
I create an extension for my app in iOS 8 and it is displayed correctly under the Today tab.
However when I make a change to the extension (either a UI change in the Storyboard, a UI change in viewDidLoad code, or some changes in the widgetPerformUpdateWithCompletionHandler method), there's nothing that is changed when I recompile. The only way I can make the changes to appear is to delete the app from the device/simulator then compile/install again. Restarting XCode (I work with XCode 6 beta 4) / restarting the computer does not help.
How can I fix the bug?
How am I supposed to debug the extension, because setting breakpoints does not seem to do anything and no NSLog messages are printed to the console (I suppose, since it's a different target).
It's a known bug, read the release notes for iOS 8b5.
Debugging (and NSLog) works in Xcode but not always (known bugs). You can still attach the debugger if Xcode cannot attach himself (Debug -> Attach to process)
For me, the simulator works better than real device, so use the simulator until things got better.
2 tips:
Close the simulator at end of debugging (i have a script for auto closing the simulator when i press STOP in Xcode, tell me if you want it).
When you launch the plugin process in simulator, wait for "All applications" display list, if you click "Run" before the list are loaded, the debugger won't attach.
Just updated to Xcode 5 and this is the first error its throwing on the logger for all my apps. Can't seem to understand why this is happening.
2013-09-19 10:46:54.341 MyApp[1156:a0b] Cannot find executable
for CFBundle 0x8a7c7a0 </Applications/Xcode.app/Contents/Developer/Platforms/
iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator7.0.sdk/
System/Library/AccessibilityBundles/CertUIFramework.axbundle> (not loaded)
Edit (11-11-2013): To everyone reading, once I waiting for a solid working solution to accept and close. The highest voted answer works until you re-open the project only.
Edit (30-09-2014): I can see this has been sorted since XCode 6 has been released! Finally
Final Edit-
Temporary workaround: click iOS Simulator > Reset Content and
Settings... and run again.
This error message may reappear at random. For me, it happens when I
launch a different application. There are several threads in Apple dev
forums and in StackOverflow about this problem, but none have a
definitive answer. This seems to be a SDK error to be fixed in the
next Xcode version.
Updated: October 3.
CREDIT - Please check this answer - Xcode 5 Error CertUIFramework.axbundle
Further Edit
Although this was potentially the issue resolution at the time. I believe some of the newer answers below relating to the better touch tool are in fact the correct resolutions.
After reading Kirill's answer I did some digging as I didn't want to disable BetterTouchTool for everything just the "iOS Simulator" and you can.
Open the "iOS Simulator" and will it as the active app go to the BTT drop-down menu from the top bar (of that screen if you have more than one) and select "Disable BTT for Current App". It will turn to a play icon when it's disabled.
Make sure the app name on the bar is still "iOS Simulator" as mine jumped to "Finder" a few times when I clicked the top bar!
Now re-set the simulator (if it doesn't work) and rebuild. You shouldn't get the error! :)
Don't forget to clear the error if it's still there. ;)
BTT seems to remember what apps it's disabled for (or at least it does when you close and re-open the app that's disabled I haven't tried a system re-boot yet).
Its easy. Go iOS simulator and reset content and setting.
Thanks
If you are using XCode-5 then just reset the simulator "Reset Content and Settings" and run once again
So I was having this error too in Xcode 5 and 5.1. I wanted to figure out if it's Xcode bug or something else, so I did a fresh install of Mavericks 10.9.2 and Xcode 5.1. Everything seemed fine after multiple tests.
Here is where the problem began. I put the apps and settings that I mostly use and the error came back. So I deleted everything and started adding everything one by one. After couple days I had bingo! The problem is with BetterSnapTool and BetterTouchTool
Update 12.12.2014
Just started using Xcode 6.1 and noticed that this bug seems to be gone at least with Xcode 6.1 simulators and BTT 0.9985 versions.
Update:
As GasB pointed out, it is possible to disable BTT for certain apps. So just disable it for iOS Simulator. You just have to remember not to use gestures while using the simulator as that triggers the error message.
Simple solution:
Remove the ticks in preference pane, reset simulator and do clean build. The error message will disappear.
.
I had the same problem and solved it setting the 'Localization native development region' to match my systems region. In my case from 'en' to 'de'. The referenced files are stored in localized versions in your filesystem. So this setting is used to identify the needed version.
You can find that setting in your project settings at 'Info' -> 'Custom iOS Target Properties'.
Resetting the simulator ‘fixes’ it because it turns the accessibility support off. You can normally achieve the same by simply disabling the ‘Accessibility Inspector’ in the ‘Settings’ app.
If, however, you need it enabled, particularly hate this error message, and are feeling adventurous then you can use the following monkey patches to silence the error: https://gist.github.com/alloy/9277316. (Be sure to NOT include this in your release builds.)
Resetting the simulator is a PITA, I found a way to get rid of these messages without having to to this:
go to Settings > Accessibility
turn on Accessibility Inspector
turn off Accessibility Inspector
quit Simulator
I had this problem with Xcode 5 in ML 10.8.5
I re-installed Mountain Lion (in a Parallels' VM), then update ML to 10.8.5.
Then installrd Xcode 5, and it's worked fine.
I think that the error is caused by a third SW installed in ML.
The application Moom is also causing this issue, and I couldn't find a way to disable it for just the iOS Simulator. So for now I disabled it's accessibility features.
I'm on Mavericks (10.9.3) and encountered the same error in xCode(5.1.1).
I tried anything - reinstalling xCode from both AppStore and dmg. Resetting the emulator resulted in the same error and deleting the Simulator SDK folder gave no results too.
The issue on my end was indeed Moom as mentioned by #aorcsik! Disabling it's accessibility, followed by clean (cmd+shift+k) in xCode cleared the error.
Open Disk Utility and apply Repair Disk Permissions in Macintosh HD.
After doing above step, apply Reset Contents and Settings in iOS Simulator.
This above solution can definitely fix your problem.
I had this problem, and none of the answers in this thread could fix it. Mine was simple UI with a UIDatePicker. I resolved it by removing the UIDatePicker and the associated code, then added them in again. Problem solved!
For me it was Keyboard Maestro, adding the simulator to Maestro's exclude list silenced the warnings
I have run into a rather annoying bug in Xcode 4.3.2.
If you run a process from within Xcode, then stop the simulator directly (outside of Xcode), Xcode still shows the process as running and effectively disables any further interaction with the simulator.
I can't stop the process from within Xcode (no response), and I can't start a new process either as Xcode sees the simulator as being in use. Shutting down the simulator does not notify Xcode either, so I have no option but to shut down Xcode and open it up again But even that does't work as Xcode hangs whilst trying to shut down the process too! So I have to force quit Xcode!
Has anyone found a way round this? I realise I should now only operate the simulator from within Xcode, but I am used to being able to operate the simulator independently.
thanks
I was having similar issues with Xcode 4.3.2. I fixed them by doing the following:
Launch Xcode.
Close any open projects.
Open Organizer.
Delete project form left panel using the gear icon on the bottom left. Select "Remove from Organizer...". This clears all the data about your project that Xcode has cached (indexes, DerivedData, Snapshots, etc.).
5). Re-open project.
Since doing this, my Xcode hanging issues have disappeared.
Here are the steps I follow when this happens:
Start the simulator if it isn’t already running
Choose the option “Reset Content and Settings…” from the iOS Simulator menu
Clean and rebuild the project
I recently installed Xcode and after closing out of the first launch (because I realized I had more configuring to do). I cannot get it to re-launch. The icon will come up, but no program will show up. I do not get an error, and I am launching from the /Developer folder (not /Applications). I have tried re-installing/restarting multiple times to no avail. I have the latest version, and I am running Snow Leopard (10.6.6).
The icon will come up, but no program will show up.
Are you new to OS X? It sounds like you are describing the way OS X apps normally start up. By default, Xcode pops up a window with a list of most recent projects, but you can switch this off. It doesn't mean that Xcode isn't running, it just means you don't have any Xcode windows open. You can still select any of the usual menu items to start new projects, open existing projects, etc.
The answer to this problem is I believe easily sorted. Once you open X code and all you get is the menu bar at the top, go to Window, Welcome to x Code, then check the box bottom left hand corner of that screen 'Show this window when Xcode launches'
Job done ! Now every time you hit the Xcode icon where ever it is the welcome screen will open and from there you can proceed into the program.
Probably not your problem, but I had issues starting xcode with it trying to load up the last project I was working on. It would just hang and I had to force quit it.
In the end I deleted these directories:
project.xcworkspace/
xcuserdata/
and next time I tried to restart xcode it started fine.
Please go project folder and right click ."xcworkspace" and open "show package contents"-> xcuserdata and delete user folder and then relaunch.
In my case I launched XCode 6 (beta 7) on my MacBook Pro Mid 2010, and I had to wait for ~10minutes for anything to happen. I didn't see icon in dock, or even menu bar - just a reference in Force Quit Applications menu. After those 10 minutes classic alert with "You have downloaded Xcode from internet..." title appeared and then i had to wait another 5 minutes for another progress (installation of additional components).In overall it took Xcode 6 ~25 minutes to start.
So... Patience! :)