Problem: I cannot simulate an Apple watch interface. Whenever I try and test my Apple watch app on the iPhone 6 simulator, Xcode successfully finishes and builds the app, attempts at opening simulator and fails with an error message which reads 'Invalid Device State'.
I believe simulator has a watch simulator that opens along with the compatible iPhone simulator models that can communicate with Apple watch (example: iPhone 6) Although I have yet to see it work. I have built a universal interface for iPad and iPhone and another for the watch, so it's not a matter of the app being for the wrong device. Whenever I test on my actual iPhone I can test the universal interface successfully.
I'm using Xcode 6.2 on iMac OS X 10.10.3
I have tried restarting Xcode/Computer. I can't seem to find any other mention of 'Invalid Device State' anywhere, hopefully due to it being an obvious thing to avoid/fix that I've overlooked. Any help would be appreciated.
Force Quit xCode and restart will resolve problem.
I had come across this issue after updating Xcode 6.4 to 7.1.
Below are fixes for this :
Clean project (cmd+shift+k) as well as clean build folder
(cmd+shift+k+option)
Quit simulator and run again
Quit Xcode and Simulator and run again
Restart your Mac.
Solution 3 worked for me!
I had the same issue. Generally it is because you just update Xcode or change its name in the Applications folder.
If you just restart your computer it will work correctly.
Hope it helps !
I observed this happening when more than one Xcode app installed.
To fix this,
Launch Xcode and click preference..,
Go to "Location" Tab, Select correct options from "Command Line Tools" dropdown
Quit Xcode and relaunch it.
Run your app.
First of all, just clean the project.
Quit your project.
Quit your Xcode.
Restart Xcode.
This happens to me when I have two different Xcode versions running at the same time. Hopefully this helps you.
No need to quit, restart or even re-install. Switch to another iOS Simulator device (6s if you were using 6s plus) and voila!
Nothing worked for me on XCode 7.3.1.
Had to reinstall it to make the simulator work.
Go to applications folder. Drag drop XCode to Dustbin.
Empty dustbin contents.
Go to App Store and install XCode.
Run XCode. The simulator should work now.
I have Xcode 7.3 and Xcode 8.0 Installed.
If a am working with Xcode7.3 and opens Xcode8.0 to get some code from Xcode8.0 project.
When i run my application on Xcode7.3 So it will give me same error.
Solution is simple ForceQuit or Quit all Xcode's and open the required one.
In my case, the simulator would show an indefinite black screen whether attempting to run a project, or running the simulator directly (which should bring you to the simulated home screen). This would happen even on a newly created simulated device.
After the existing suggestions failed, the following worked for me:
Delete the Simulator
Delete XCode
Delete the Developer folder
Reinstall XCode from the app store. This requires attempting to run XCode again so that Mac OS will realize it's no longer installed.
Jus clean the project and restart Xcode. This happens to me when I have two diffent xcode versions running at the same time.
Robust fix is Just Quit your xcode and run again, hope so it will help you. This heck work for me.
On M1 Mac I've found more than 3 open simulators can cause this error. Quit the simulator app to fix this error.
I am pretty sure that in my case the simulator was corrupt after a failed language change.
Following this answer to reset the simulator worked.
Related
While I am try to run an app in the iOS 10 simulator using xcode8 I get these alerts frequently. They randomly appear two at a time and it is not apparent what is triggering them.
Below is Image for Error I got.
I tried Following things.
Clean & Rebuild an app
Restart xcode & Simulator
Clear Derived Data & Rebuild application.
Even I was getting the same error. Issue in my case was I was working on xcode 7.3 and its simulator was open, later on I closed xcode 7 and opened xcode 8 and tried running app and got the above error.
I guess its happening because of both the simulator were open, it got solved when I closed my older simulator. Seem to be some problem while xcode 8 was trying to establish connection with simulator.
You just follow these steps to remove this error it's working fine in my side and i hope these steps work to you also just try it.
i)Remove multiple xcode versions.
ii)Quit all Xcode and simulators.
iii)Only one version you opened.
iv)Go to Xcode -> Preferences
v)Go to Location
vi) Set proper version for command line tools (your Xcode version)
vii)click on Derived Data
viii)Then go to Derived data and delete that folder. see below image
ix) Click on Simulator reset content settings and just quit xcode and simulator and open clear and build the xcode and run it.
Without deleting "Derived data" folder
The same rules as in the past apply to switching between Xcode 8 and
Xcode 9:
Quit Xcode, Instruments, Simulator.app, and Console
xcode-select the version you want to work with
Start the version of Xcode you want to use
If these steps don't resolve the problem for you, you can repeat the steps above > but after #2 add "sudo killall -9 com.apple.CoreSimulator.CoreSimulatorService".
from this https://forums.developer.apple.com/thread/79301
The Same issue I have faced when I have two Xcode version, but the issue was when we are opening the two instances of simulator we will get the same error, the best way to solve this issue is run command
rm -rf ~/Library/Developer/Xcode/DerivedData
to remove the derived data.
None of the above worked for me.
Instead of choosing the simulator and hitting "run" i solved it by opening the simulator form "Open Developer Tool" menu first. After that all worked fine.
I had a similar issue, despite not launching a second instance of the simulator, due to using SimPholders and having the XCode Command Line Tools set to a different version of XCode. To resolve this, open up XCode preferences, and under the Locations tab ensure that the Command Line Tools version matches what version of XCode you're currently working in.
I had the similar issue shown in below screenshot.
Got it solved by closing Xcode 7 and its simulator.
It seems that when you are working on Xcode 8 and its simulator then Xcode 7 simulator should not remain open.
Below is screenshot of simulator state for Xcode 7 when you're working on Xcode 8.
In my case,
I was open a project a Xcode 8, and the emulator for this version, then open this project on Xcode 7.3.1, when I create an emulator it shows the alert.
My Solution: Close all version of Xcode => Clear Derived Data => Quit Xcode => Open Xcode => Choose File => Open Recent.
Force Quit.. Xcode and simulator. This kind of issue happned because maybe you are try to run more than one different version Xcode at same time.
I just had this issue when attempting to debug an iOS application from Xamarin, which uses Xcode to run apps in the simulator. I was initially targeting a 9.7" iPad Pro, attempted to change the simulated device to an iPad Air 2 (still on iOS 10), but the simulator didn't respond. After quitting and relaunching the simulator it appeared to load okay, so I changed back to the previous device - not sure whether changing devices actually did anything but I haven't seen the error message in the few times I've run my app since.
Solved it by closing all xcode and simulator. Don't ask me why. It was happening on the beta version for me
I had similar issue, what I did is I closed the simulator and all the Xcode and I went to the terminal and typed to see any Xcode application running then I killed it. I had one Xcode running in the background.
Command to see if Xcode is running,
ps -e | grep -i xcode
Use kill comment to kill any runing Xcode app, I used
kill -9 <pid>
The Same issue I have faced
in my case i stopped all applications and restarted my mac
and every thing is OK
Simple And fast Remedies..
1.Quit all xCode and reopen the xCode which you need to work...
I had this problem too, but I did below process it's working fine.
You have both Xcode 8.x.x and 9 running on your Mac, which causes the problem. Only run one Xcode at a time (Quit another Xcode, don't let another Xcode runing in background!).
This can occur when you have more than one version of Xcode installed on your computer. Make sure you QUIT (not just close) all versions of Xcode first.
Changing the device seems to have worked for me after doing the other stuff. Didn't have to restart my computer.
I was trying to run my project on Xcode, but I found that when I hit Command-R, Xcode would say the app had built, and was running, but after 3 minutes, it still hadn't appeared on the simulator. I ran it again, and it did the same thing, so I force-quit Xcode, and reloaded it. When I had reloaded Xcode, all the simulators had disappeared, and when I try to run the app on my phone, Xcode starts building, and then just stalls when processing one of the XIB files.
I have tried going to Windows->Devices to reinstall a simulator, but Xcode just freezes when I do this.
It seems I have royally screwed my developer environment by force-quitting while it was building. How can I fix this?
All help app-reciated.
Try to exit the simulator.
If this doesn't work try to restart the computer.
if none of them work you are screwed and should reinstall xcode
I fixes this by downloading the Xcode 7.2 beta. If you're viewing this question at a later date, download the newest beta of Xcode (or if you're using the beta, download the standard code). This version of Xcode is completely separate to the standard Xcode, allowing everything to run on normal settings.
First try and restart Xcode, then your computer. If this does not work, reinstall the newest version of Xcode from https://developer.apple.com/xcode/
I cannot launch the simulator successfully. Once I launch the IOS Simulator this error appears:
"Unable to boot the IOS Simulator."
Following the IOS Simulator error, I then get an error from Xcode reading:
Unable to run app in Simulator
An error was encountered while running (Domain = DTiPhoneSimulatorErrorDomain, Code = 2)
UPDATE:
This might sound silly but I went to Xcode/preference/Downloads with intentions of seeing a IOS 8.0 Simulator but there was none. Could this be the problem? Am I suppose to have a IOS 8.0 Simulator? If so can someone direct me how to get it? Also, under the "Downloads" tab in Xcode preference I do see IOS 7.0 and 7.1 Simulators and both work fine with Xcode 5.
the trick is, to select the right command line tools!
just select it here
reboot(!) and everything is fine again :-)
Ok It's known problem. Do you see simulators list? If not
Goto Xcode Menu -> Open Developer Tool -> It will open a simulator in your Dock -> click on simulator then go to Simulator Menu: Hardware -> Device -> Manage Devices. Add needed simulators. Always try to run your app with different simulators.someone will work.
Restart your Mac. I just had that exact error after installing Xcode 6 beta 7, literally the only thing I did in response was reboot my Mac and now the iOS 8 simulator is working.
This error is common if you update Xcode without restarting afterwards.
In my case, i reset ios simulator settings fix it.
iOS Simulator -> Reset Content and Settings ...
Open Xcode 6 beta
Goto Window > Devices
Click on the little + sign at the bottom
Add (if missing) all the devices that you want, or delete and recreate if not working.
If anyone of the simulator is not working then you can delete it and then re-create it again in this menu.
I saw the same issue when I installed Xcode 6 beta 6, and deleted beta 4 and beta 5. Apparently, deleting the old betas also deleted the iOS Simulator 8 versions! Putting it back from my Trash solved the issue.
Solution: Don't delete old beta software!
Edit: #Flori's solution worked. Was able to delete the old beta software, and after a complete system reboot, it worked again.
From the xCode 6 pull down menus, Xcode > Open Developer Tool >
iOS Simulator (if you get a pop up error just dismiss it)
Once in the Simulator go to Hardware > Device > Manage Devices.
Delete everything listed under simulator.
Reboot your machine.
After that, navigate back to Manage Devices in the simulator and click the plus to add back your simulators. Then the iOS 8 simulators will show up.
Just unset DYLD_INSERT_LIBRARIES environment variable in the /etc/launchd.conf or ~/.launchd.conf file. Which you can edit by sudo vi /etc/launchd.conf command. remove the above flag save it by "ZZ" (captial Z) and reboot the system. It works like a charm.
Make sure that path in menu XCode>Preference>Locations point to XCode 6.0 (Restart Xcode after changing them). Then go to menu Window>Devices and add simulator devices you want to use.
Edit: Turns out I was getting my version of the error because I had a file (the "Empty File" type) named "Frameworks" in several of my projects, and this was causing big issues with the iOS 8 simulators. Renaming the file to be anything else, and then doing a Clean Build Folder fixed it right away.
------Deprecated Original Message Below--------
In case this helps anyone -- I was having a similar error on Xcode 6 GM, and tried everything mentioned in these Answers, but the iOS 8 simulators would never run any of my apps (no problems with iOS 7 running from Xcode 6 though).
What did sort of work was creating a new project (new project apps would run in the iOS 8 simulators, but never any luck with existing apps). Copying over files and project settings is no fun, but at least it let me do testing and see if my apps needed fixing for the iOS 8 public release.
Extended description of problem at https://devforums.apple.com/thread/246751
I tried everything mentioned above and nothing worked.
Finally the only way to make it work was unsetting DYLD_INSERT_LIBRARIES=/usr/lib/libimckit.dylib
How I did this:
Open terminal and typing "sudo vi /etc/launchd.conf"
Changing
"setenv DYLD_INSERT_LIBRARIES /usr/lib/libimckit.dylib"
to
"unsetenv DYLD_INSERT_LIBRARIES /usr/lib/libimckit.dylib"
Save changes
Reboot your system
In this post [1] explain what DYLD_INSERT_LIBRARIES is for
[1] https://stackoverflow.com/a/26053165/2091181
I got this issue when moving from Beta 6 to Beta 7. Very frustrating. I could reset content and settings on any of the iOS 8 simulators. None of my iOS 8 simulators were working at all, just a black screen. I restarted my machine during the process, but I am not sure if it did anything. Initially I had only iOS 8 Simulators. I had to remove and reinstall Xcode6Beta7. I did not get the Install More Components the first time I installed it, I am not sure if that was the missing part. I installed the iOS 7 Simulators from Settings->Downloads because my iOS8 ones were not working. After I had reinstalled and relaunched the simulator, I then had a list of iOS 6,7,& 8 simulators. None of the iOS 8 Simulators were working. I was able to launch the iOS7 simulator and then using the device menu change to an iOS 8 Simulator. Some still did not work, I had to remove them and re-add them in the devices screen.
Remove XCode6Beta from Applications.
Restart Machine (Just in case, this seems to solve some peoples issue completely)
Install XCode6Beta.
Verify the Install Additional Components ran.
Launch Xcode6Beta.
Preferences->General->Change Command Line Tools to Xcode 6.0.
Restart Xcode.
Preferences->Downloads->Download iOS 7 Simulator (If not already downloaded).
Run App on iOS 7 Simulator (Or launch iOS Simulator and switch to iOS 7 device)
If the iOS 7 Simulator is working, Hardware->Devices->Select an iOS 8 simulator.
Delete and recreate any non working iOS 8 Simulators in Window->Devices from Xcode.
I wrestled with this for a bit, with the simulator app reporting that it couldn't find the iOS8 simulator, and suggesting updating in Prefs/Downloads, which didn't work. I tried re-installing Beta 6 twice (without removing all the support files, which would have been next). The initial installation described itself as build 6A280c; a fresh download yielded build 6A280e. No luck.
Eventually, I opened Window -> Devices, and used the "+" button in the lower left to add a new simulator for iPhone 5s, iOS 8, naming it "Fresh 5s". The Schemes popup now displayed three iPhone 5S/iOS 8 options (none with the name I designated, but differentiated by UUIDs); at least one of them worked.
I'm guessing that this feature (collections of arbitrary simulator instances) will be very useful when it's baked. In the meantime, I guess I'll need to manage the list of simulators manually.
Do following steps worked for me:
1. Launch the iOS Simulator and go to iOS Simulator --> Reset Content and Settings...
2. Close all the applications and restart your mac
3. Open Xcode6.0.1 or 6.0 and test the iOS Simulator
Had the same problem after moving from Xcode 6 beta 5 to beta 6, but also for the iOS 7.1 simulator. Restarting my machine seemed to do the job. I did not need to update from Xcode 5.1.1 CLT to Xcode 6.0 CLT.
I tried all of the solutions above, and was still unable to launch the iOS8 Simulator. The iOS7 Simulators all launched fine.
Looking at the Console, I found that the launch was crashing, and the crash log complained about the dynamic library, libimckit.dylib. You can read about that here:
https://discussions.apple.com/thread/5781366?start=0&tstart=0
The quick solution, remove that and its partner library, reboot, and it loads.
Is there anything interesting in ~/Library/Logs/CoreSimulator/CoreSimulator.log?
The "Unable to boot the iOS Simulator." error message is almost always because launchd_crashed because DYLD_INSERT_LIBRARIES was set to something not compatible with the iOS Simulator runtime. Do you have any crash logs (eg: launchd_sim crashes) in ~/Library/Logs/DiagnosticReports? If so, check if they show DYLD_INSERT_LIBRARIES being set. If that's the case, your options are to either update to an OS X Yosemite host (which will deal with this issue) or unset DYLD_INSERT_LIBRARIES (likely set in /etc/launchd.conf or ~/.launchd.conf)
Force Quit All the apps including xcode and simulator
Restart MAC
Checking in the "Locations" Xcode preference, I had two items of the same version, one located in the app translocation area (/var/.../AppTranslocation/...). Also I had previously done a manual command line tools install. To resolve this in the end I had to delete /Applications/Xcode.app and remove the manual command line tools install:
sudo rm -rf /Library/Developer/CommandLineTools
Then installed Xcode anew, and rebooted. Boom! Simulator working again.
Reboot your mac os. its working correctly on xcode 11.3.x and mac os 10.14.6.
I'm trying to test out my app on my ipad and when I decide to run it on my ipad, Xcode says that it's successfully built. On the top, it says that it's runnning the app, but nothing happens for 2-3 minutes. Finally, I get two screens popping up saying "An unknown error occurred." I have tried running other apps through Xcode on my ipad and they work fine. I also decided to exit Xcode and restart everything, but the problem still exists. Does anyone know what the problem is?
Not sure if this will be useful but
Xcode Version: 5.1.1
Ipad Version: 7.0.4
Mac OS X 10.9
I found one approach:
Before this approach make sure that you have all certificates and other documentation updated.
I have faced same issue, now I have a way to fix this. I am using iPhone 5 with OS version 9.1
First, delete the app from your device and then restart the xcode by force quit and then again open it. Now clean your project and run the project in your device. Now it will be run without any issue.
Close your simulator or unplug and plug back in your device, and re-select the device target.
In my case . I cleaned the product and rebuild it and it worked.
Sometime is you forget to unlock your device.
I just downloaded Xcode 6 & played with it a bit.
After switching back to previous version of Xcode and running in simulator, I keep getting this error.
Unable to determine simulator device to boot.
How do we resolve this?
Thanks in advance.
Make sure you have only one iOS Simulator instance running in the Dock.
There was a simple answer to this for me:
Open the simulator via Xcode -> Open Developer Tool -> iOS simulator (even if it can't launch, the app will be open).
With the simulator app open, go to Hardware -> Device -> Manage Devices.
Add any missing simulators with the plus button (all of mine were missing for some reason).
I've faced same issue and solved by below steps:
1) Move xcode6-beta into application folder
2) Restart mac and open xcode6-beta from application folder.
I had the same problem when running from Xcode 6 beta selecting iPhone 5s. If I choose iPhone 5 or "resizable iPhone" then my app launches fine.
You will not see the profiles of simulator without a rebooting of OS X.I added simulator for many times,when the rebooting finished, it shows on the device list under the simulator bar. I think this is a bug of Xcode 6 Beta
I think you have 2 simulator running in the dock. Please close another one simulator and run the project again. It might helpful for you.
In my case I had such a message just because the simulated device was still booting (longer than usually, I guess). Xcode 7.2.
(This is not actually an answer to this specific question, but I came here googling the message in the title, so I am writing my note here for if someone else gets the same case as I did)
My case wasn't about having two simulators open. It was just because having instruments open as well. Closing Instruments resolved the issue
I just fixed the exact same problem by removing the beta version and rebooting the computer.