iPhone Simulator is constantly crashing - ios-simulator

I'm running the latest macOS 11 beta (20A5364e) and Xcode 12b6 (20A5364e). When starting the Simulator it constantly crashes every 10-20s. Independent if an app is running or simply the Home Screen is shown. Anyone else/ Any known fixes?

Related

VS2019 Xamarin Forms Remote IOS simulator Black screen - How to fix?

Xamarin Forms Project
Microsoft Visual Studio 2019 Version 16.9
Xcode on Mac version 12.4
Using IPad Pro 11 inch running 14.4 as the simulated device and IOS version.
( I tried other simulators )
If I build and run Simulation on the Mac, it works. So i believe it is a remote simulation issue.
If you set IOS simulator to remote it starts and appears to run the simulation
in the simulator but it just shows a black screen.
Ive updated everything I can think of. Mac OS, XCODE on latest available.
Visual Studio, W10, all latest available and everything restarted...
Still it doesnt work. You do see brief at time of deployment dots spinner that reminds of the spinner when shutting down.
How do I fix the back screen simulation. ?
EDIT: With Latest Updates, it works again.
After upgrading to VS2022, upgrading Xcode on the mac.
Even the simulators are now ios15.x
Somewhere is all those updates the problem is gone.
You could have a try with Forget the Device first:
Next step, better need to reboot Mac .
Last, Pair to Mac again with Add Mac manually:
If it also can not work, maybe need to check the quality of network whether is well.

Dramatically slow Web UI testing on real iOS device

We have set of mobile UI test for website written with Java, using Selenide, Cucumber, Chromedriver. All these test running fast on chrome browser emulator. Now I'm trying to run all my tests on real iOS device, using:
Appium 1.6.3;
ios_webkit_debug_proxy 1.7.1 (Built with libimobiledevice v1.2.0, libplist v1.12);
Xcode 8.2.1 (8C1002);
WebDriverAgent;
iPhone 5s (two real devices - iOS v9.2.1 and iOS v10.2.1);
MacOS Sierra 10.12.3
Test successfully passes, but it is dramatically slow. For comparison, one small scenario take 3 min 20 sec on real device, and 20 seconds on chrome emulator.
Is it possible to optimize work of ios_webkit_debug_proxy, appium or WebDriverAgent?
Looks like ios_webkit_debug_proxy makes some heap dumps during test run and this makes test slow. Am I correct? Is it possible to run tests against real iOS device without ios_webkit_debug_proxy?
Please, help me with this.
I’ve installed appium 1.6.4-beta and was surprised. My test become faster in ~4 times!
Execution time on real device comparable with chrome emulator (for one 7-step scenario: 23 sec on chrome emulator and 50 sec on real iOS device!)
Previously I’ve mentioned that execution time of this scenario took about 3 minutes (for appium 1.6.3).

Xcode 7, simulator with black screen with apple logo

Ever since I upgraded to Xcode 7, I keep seeing this on my simulator every time I launch the simulator or I switch between the different simulators. Any reason why or how do I fix this? I've also made sure I don't have other apps running to use up my system resources.
Is this a hardware issue ? I'm using a '2.5 GHz Intel Core i5' MacBook Pro with 8GB RAM at home. At work I have a higher end retina display MacBook Pro (2.7 GHz Intel Core i7) with 16GB RAM and I don't encounter any delays when loading the simulator or switching between them .
There is nothing broken here, so there's nothing to fix.
The iOS 9 Simulator Runtime added the boot logo, so you will see it rather than a black screen on boot (just like on a real device). Older runtimes just show a black screen.
The first time you boot a device (sim or real), it will display the progress bar as it runs through some initial setup steps.

Xcode7 :Simulator in use ios 9

I am getting this error with Xcode7.
Xcode cannot launch apps on the simulated device “iPhone 5”,
as it is currently running app with pid 3626 on “iPhone 6s Plus”.
Only one simulated device may be used at a time
I am not running any other app but the simulator still shows the message above.
I restarted XCode but it still did not work.
There are no active processes running for iOS simulator in the activity monitor.
Close the simulator (cmd+Q) and retry.
Also, make sure that another Xcode project is not using it.
Restarting xcode worked for me.

Xcode 6.1 and iOS Simulator 8.1 very slow to run

I'm using Xcode 6.1 and iOS Simulator 8.1. It takes a long time to run the simple apps that I've written using the iOS Simulator. Build process was ok but then the iOS Simulator will show the black blank launch screen then the app screen for like 5 minutes before the app launch. Many times it shows error "Lost connection to iPhone 6(/5/4s)". Tried to re-start Xcode and iOS Simulator, and MacBook Pro multiple times already. Tried to reset "Content and Settings" in the iOS Stimulator, but doesn't help.
What could be the possible causes? Any advice/solution? Thank you.
I suggest that you boot up the device that you want to use prior to the Build&Run in Xcode. If you hit Build&Run in Xcode while the device is not booted, you will need to wait for the device to boot. This can take a long time depending on your I/O load (eg: if Spotlight is indexing at the same time you are trying to boot, or if your home directory is on a slow volume like a network mount).
Just open up iOS Simulator.app ahead of time and select the device you want to test on from the Hardware->Devices menu. Then it will be ready when you need it.
Make sure 'slow animations' is not selected under the Debug tab in the iOS Simulator. That fixed the issue for me.
Googled on this issue and some said it's a Xcode bug with the 6.1 beta, but I had the 6.1 release version installed alreadt. I even try the 6.2 beta, hoping Apple has a fix for this, but no luck, still the same.
So desperate that I decided to upgrade my 3 years old MacBook Pro RAM and harddisk to SSD. Problem solved with the upgrade! The iOS Simulator runs normally now.

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