I'm having trouble with the iOS simulator. I'm currently on 10.7 and was using the simulator to test my website. During the testing, I switched the iOS version via the tool bar, and the application froze and quit. Upon restarting, I get the following error message, with a finder window, inviting me to choose an application:
"ios Simulator Could Not Find The Application To Simulate"
Here's what I've tried to fix the issue:
1: Attempt to identify the application it needs, but the only thing i could see to open was a printer app and the ios simulator app, which just results in a "only one iOS simulator can run at a time" error message.
2: Restart the Mac.
3: Download the new Xcode tools from the app store.
4: Restart again.
None of this has helped, and I'm really stuck without it at the moment. If anyone knows how to resolve the problem, I would be grateful to hear any suggestions. Thanks.
Give this a shot.
Open up a new shell, and shoot of this command: sudo <Xcode>/Library/uninstall-devtools --mode=all (assuming thats the location of the instal).
Then run the Xcode installer you got from the app store.
This removes all the plist files that were also installed with xcode, which aren't removed when you simply reinstall. This is as close as you can come to a complete xcode refresh without reinstalling your OS.
Here's an alternative solution that worked for me... the answer selected here did not. I created a blank, "hello world" project and simply ran it. When you run the app, it sends the app to the simulator and voila! iOS Simulator has an app to simulate. From that point forward, you should be able to open the iOS Simulator without a problem.
After a while longer trying various things, it seems like I may have fixed it.
When asking for an application to open, I opened Xcode, and (weirdly) that opened up and left the testing shell visible, with the tool bar intact. I then selected the current version from the device options and hit the home button, and suddenly everything appeared.
Weird thing to have suddenly happened, but there you go.
I still can't test in iOS 3, so that's a bit of a problem, but not a disaster either!
Related
I installed Xcode(9.4.1) from App Store and create a iphone simulator.
After that I tried to install some .ipa(https://github.com/OWASP/owasp-mstg/tree/master/Crackmes/iOS) app to it but it immediately quit when I opened it.
I tried couple app but the error is the same But when I wrote sample app on Xcode and build to my simulator it run very well.
Even if I try another iphone simulator or reinstall Xcode, I still get same error.
you need to find where is the error located in your application ,
here is a link reference explaining about how to find the cause error
also it will explain the most common mistakes in xbasic
click here
I keep getting the "The Simulator can't be launched because it is already in use." when trying to run my app, this only happens about 20% of the time but once so far the only way to get around it is to restart my Mac.
Tried the following but doesn't help:
Cleaning my build folder
Closing and re-opening xCode
Force close of simulator
I'm Using xCode 6 (beta 4)
Any Ideas for a solution that doesn't entail me restarting my Mac?
Thanks
"The Simulator can't be launched because it is already in use.”
This messege will be shown only if there is another xcode project that has launched simulator and hasnt stopped it yet, and u try to run the simulator from another xcode project.
Ideally stopping the simulator from the respective project(PS. not closing the application from the simulator, clicking the STOP button) would do it,
But if it still is working like that, then Closing the simulator, or resetting the simulator contents.
If that still dsnt work, then as a last resort i would ask u to reinstall Xcode, as if this problem keeps going on, then ur downloaded file might be buggy.
P.S if u opt to re-download n install xcode please keep backup.
Hope it solves it. Although i want your problem to be solved by step 2.
This normally just happens when running an app (project) on the simulator and then trying to run another app while the simulator is open (and normally is still within the first app you launched and it can't quit automatically). As long as you keep running the same app you shouldn't get this error and as soon as you run another app just make sure you've closed the simulator before or at least left the previous app with the home button.
Just Restart Your Mac , It Will Fixed
I had the same problem and fixed it without restarting. You just need to reset the content on ios simulator, exit xcode, and then to make sure that you've completely exited, right clicking on the xcode icon on your mac nav bar and click Quit. Open it back up and it should work.
No app can run in my simulator, although building is good.
Error messsage is below:
Unable to run app in Simulator
An error was encountered while running (Domain = NSPOSIXErrorDomain, Code = 3)
In my case, I tried to run the app on a iPhone 6 simulator when I got this error. Quitted the simulator only and re-ran the app on iPhone 5s (8.1) - it worked fine.
After a while I changed the target back to iPhone 6 (without quitting it), and ran the app against it - no error shown.
As mentioned in the Xcode 6.1 Release Notes and in my sticky post in the Apple Developer Forums for the iOS Simulator, this is a known bug in iOS.
Upon installation of an app, SpringBoard will SIGKILL that app's
process in order to force a relaunch of the app with the new
executable. The problem is that there is a race condition whereby
SpringBoard may accidentally SIGKILL a new process that we just
launched rather than the old process. Which of the various error
messages you get depends on exactly when in the launch process the
SIGKILL was delivered. Normally, this shouldn't happen, so the advise
is to just try again (sorry =/). If you find that this happes to you
all the time or more frequently than you can tollerate, we are
incredibly sorry. We are aware that systems with slower disk I/O will
see this happen more frequently than faster systems, so if you are
using an NFS home directory, you may want to create a local directory
for your simulator data and setup a simlink to it from
~/Library/Developer/CoreSimulator
By Quitting the Simulator and Run the application worked for me.
For me , just Reset Content and setting in your simulator
Restart Mac can solve the problem for me.
This error is less severe than "Domain = DTiPhoneSimulatorErrorDomain, Code = 2" error that I had when I switched to Xcode 6.
For this one, I just reset and cleared contents on my Simulator...quit. Rebuilt and ran my app...and it works.
Every time this has happened to me (as of this writing, still happening on Xcode 6.1) I do not need to restart my mac to fix it. Instead I only had to restart the simulator. I exit the simulator by right-clicking on its icon in the tray and selecting the option to Quit. The I re-run my app and the simulator starts from scratch and runs my app with no error. Much quicker than re-starting the mac.
Well, I had the same error popping up, but since I force quitted the simulator then ran the project again I got it fixed and running fine. Hope that helps you :)
If this error occurs with ionic framework, make sure you have an app id given in your config.xml
This is a generic error which says that it is unable to launch the app. The real error is in the log file. Go to the Simulator menu, Debug / Open System Log. Then press Reveal button to open the folder with actual Simulator logs. In my case it was CoreSimulator.log.
Here you will find the real error. My error was Could not register service com.apple.gputools.agent.producer.sim .
After a lot to struggle and trying all suggestions for half a day, I just went to simulator menu and chose File / GPU Selection / Use External GPU when available. That's it.
please download new xcode_6 beta 4. your project will work in simulator. As i have tested as well.
Sometimes the beta version of XCode is wrongly configured to use the command line tools from the previous xcode version.
This solution should fix the issue for you : https://stackoverflow.com/a/25415781/512504
I'm developing for iPad (iOS 7), using Xcode 5.0.2.
Yesterday morning I was playing around with the app (my first app) and every time I ran it, it was displayed in the emulator perfectly. But after some 5/6 runs Xcode just stopped launching my app in the simulator. I started to receive this message:
MagazineManager exited unexpectedly - lost connection
Image:
I've been researching since yesterday morning for a solution with no luck. I even uninstalled and reinstalled Xcode, cleared the cache, delete folders... all that drama thinking it could be some sort of cache problem.
Then, going online I've tried lots of "solutions", none worked.
I've tried all listed here: Xcode suddenly stopped running project on hardware: "Could not launch xxx.app: .. No such file.."
and here:https://discussions.apple.com/message/23431537#23431537
and in more places.
After all my "try this, try that" I'm stuck with the same problem. I can only see a black screen at the simulator (image below) and that message at Xcode!
In my extensive research I've read that people are still able to debug using their iPad's. The problem is that I got the new iPad air, that's only getting here dec, 20th!! So I don't have a place to test my app[s].
Thanks!
UPDATE
Just got this message in the debugger console:
013-12-09 20:23:25.902 sim[607:303] /Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/usr/bin/sim: Did not find an executable file at the path: '/Users//Library/Developer/Xcode/DerivedData/MagMan-bvhhiijesvrvuteunbmpsxcqgsst/Build/Products/Debug-iphonesimulator/MagMan.app'
My problem was the debugger. Actually, it still is.
The way I solved, and have been doing for every new project, was to disable the debugger and then run the project. That way I'm able to use the app on the simulator but without the debugging functionality.
I don't know what the problem is, what is causing this debugger issue in my case, but for now that's the best I could come up with. Thanks to the friends that replied to my question and helped my research I was able to test it and disable it.
This is how I disabled the debugger:
Project > Edit scheme
Set Debugger to None
If anyone knows a solution for this, feel free to answer this question and I'll make sure to update the selected answer accordingly.
Again, thanks for all your time and patience, specially #Popeye and #HotLicks that spent a lot of their time trying to help me.
Sometimes the simulator can be a bit flaky and just needs resetting. In the navigation bar at the top of the screen when the simulator is visible try:
iOS Simulator --> Reset Content and Settings...
This should reset all the settings and remove the content so all data, images, apps etc will be removed, its like it has never run before.
UPDATE
The answer on XCode5 can't install app on iOS simulator indicates the following
I found a "Fix" for this. After trying everything and getting the same error on "My App", I opened and tried to run "My App 2". "My App 2" ran fine, so I went back to "My App", tried again and this time everything worked fine. Crazy
If that doesn't work leave a comment and I will have another look.
Delete the app and restart your iPad it will work
As the title says, I'm having issues using LLDB. I've looked into this thread Xcode 4 hangs on attaching to (App name) when debugger is set to LLDB and followed the instructions given because I'm having exactly the same issue, and managed to debug by using GDB - it works flawlessly. Anyway, i'm working in a team and I'm the only one who's having this issue, so it's a bit annoying to switch back and forward from GDB to LLDB every time i commit changes so the workaround doesn't get synchronized in the remote repository.
I've checked the compiler, and it's set to LLVM 4.2. In fact, the app compiles perfectly and gets installed in the simulator (i can execute it once I kill and restart Xcode). I would try to reinstall Xcode, but it's a mess since it's a big-sized package and I have a limit on my internet usage, it would take a long while. Does anyone know what's happening here? Is it possible that LLGB is bundled outside XCode, even if I failed to locate it on the system?
Any insight would be appreciated. I can keep the workaround going, it's just that it's a bit annoying given my personal circumstances :-)
EDIT: More details about what I mean by 'hung'. I start with Xcode open, and simulator closed (it doesn't even appear on the Dock). I click 'Run', the simulator is launched successfully, and the application shows the Splash Screen. Then xcode shows the message: "Attaching to ". And now it's hung. You can close the simulator, and xcode is still attaching. Both the Run and Stop buttons stop working. You can try to exit the application by right-clicking on the dock, you get an alert message, and from this point you can't even type code: XCode is fully hung. The only choice here is to kill XCode by using Cmd+Alt+Esc.
This sounds like it could be the problem some folks were seeing in Why does the LLDB Debugger constantly fail to attach? where they'd modified their /etc/hosts file so when Xcode tried to connect to debugserver via "localhost", the connection was never set up.
When Xcode hangs, try switching to Simulator by clicking on its Dock icon. Don't use Cmd+Tab.
Upgrading to XCode 4.6.2 fixed this issue for me