Our company has a native iOS app that was built in Xamarin/Visual Studio. We originally uploaded it to the App Store a few years ago and have made a few changes to it over the years.
The app itself is very basic. It's basically just a web view that navigates to a Single Page Application. There is very little native app code in the project.
Every week or so I regular launch the native app on our company iPad. Instead of running a version pulled down from the App Store, I periodically rebuild and upload the app from a Mac Mini running Visual Studio and/or debug it directly from the Mac Mini through Visual Studio.
A few days ago I tried launching the native app and after opening it immediately closed. I tried rebooting the iPad but the app still minimizes/closes immediately after opening. If I double-tab the Home button on the iPad, I can see the app still running in the background, but any time I tap on it it immediately minimizes itself.
I tried Cleaning and Rebuilding the native app solution in Visual Studio and re-uploading it to the iPad and that didn't fix it. I updated Visual Studio (and all of its packages) on the Mac Mini, updated XCode, updated Mac OS, updated iOS on the iPad, and nothing resolved the issue.
When I attempt to debug the app from Visual Studio, it shows two error codes in the Output window: MT1043 and MT1007. The debugger always fails to attach to the app as well.
I've tried Googling the error codes and the problem itself and haven't found anything that has worked. I've tried generating a new Development Certificate and Provisioning Profile to use to sign the app when uploading it to the iPad but that didn't work either.
What's strange is that if I download the app off of the App Store it works just fine. The source code that I'm attempting to build/run right now is identical to what it was at the time it was deployed to the app store. What else is strange is that, if I spin up an iOS Emulator and upload/debug against that, the app works just fine.
I tried using a different iPad and it had the same issue. The app minimizes itself immediately after attempting to launch it.
Found the answer. Had to set the system certificate trust from "Always Trust" to "Use System Default". Same solution as provided here: https://stackoverflow.com/a/52506186/9704484
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I'm building a Xamarin app, and, so far, I've been able to build without issue on the iPhone Simulator, but I haven't been able to get the app to launch successfully on a physical iPhone device. In the past (about a month ago), the app was working fine on the same device. Here's some background on the specifics:
I develop my Xamarin code on my Windows machine, which is linked a remote Mac (hosted by MacStadium, a third-party hosting service).
My test phone is an iPhone 5c running iOS 10.3.3
To deploy to my iPhone, I build my app in Release mode in Visual Studio, upload the code to a third-party app installation service, Installr, which hosts the IPA file and assists with the installation of my app on the physical device. I've never had an issue with Installr and have no reason to believe that this is the source of my problem.
Since the last time the app worked on the physical device, I updated Visual Studio to version 16.3.2 and updated Xamarin. Here's the Xamarin Specs:
Generally, what happens, is that I download and install my app on the iPhone without any issue. However, when I click on the app, the splash screen loads for about 5 seconds, a white screen briefly appears as follow, then the app crashes.
I've seen several related articles on StackOverflow and other sources on the internet, but none of the proposed solutions see to work for me. For example, I've tried adding [assembly: XamlCompilation(XamlCompilationOptions.Compile)]
to App.xaml.cs with no luck.
I've also played around with changing the CSProj file settings to compile for various combinations of ARM64 and ARMv7. Changing this didn't help either. I've tried changing the linker behavior to "Don't Link" from "Link Framework SDKs Only", and I get an error message stating that the native code is too large for 32-bit architectures. I would compile for only 64-architectures to get around this error, but I believe that the iPhone 5c uses a 32-bit architecture.
Here's what my iOS Project's CSProj file looks like currently. I've tried checking just about all of those checkboxes with no luck:
I'm stumped as to what this could be. Any suggestions would be greatly appreciated. To further complicate things, I haven't been able to get a good log file from the iPhone. Since the Mac is remotely hosted, I can't plug my phone into XCode to pull the logs that way. Does anyone have a reliable solution to get log files another way?
It looks like upgrading solved the problem. Visual Studio was updated to Visual Studio to 16.3.5 from 16.3.2. XCode on my Mac was updated to Version 11.1. After these updates, Visual Studio performed an update while connecting to the Mac remotely.
I have created an application that needs to run on a standalone machine that has and cannot have any internet connection.
Everything was going well until I tried to run the app in visual studio 2013. I have found that I need to be connected to the internet when I first run the app in the IDE. The issue is that it seems to need to load symbols from application extensions. I have used a few extensions, xceed WPF toolkit, BrainboxesIO, Log4net, SnmpSharpNet. After the app runs once it doesnt need to happen again until I reboot my machine. How can I prevent the need for internet connectivity, firstly whilst developing in the IDE.
I have tried to deploy my app. I can create a setup project. But as soon as I use the configuration manager to go to release, I lose reference to the same extensions. If I create a .msi in debug the app runs, but again needs the internet when it first runs. I can then disconnect and it runs provided I don't reboot, which is obviously not what I need.
Anyone have any idea what I'm not doing right?
I am designing a simple webBrowser with webview, in VS 2010, when I compile program, it's okay, and even when I run it in emulator it works all right and I see the window and button, but when I install on device, immediately says 'stopped' and closes the application without showing anything.
I use API 8 to compile and install unsigned version and try to install it on android 4 or higher.
Appendix: When I run project in xamarin, it doesn't create apk file, nevertheless I did all configuration said in docummention.
What should I do to run on device or when can I compile it for once?
I have created a windows application using c# VS express 2012. The app works great in the VS environment. I have published the application using VS(ClickOnce) to the Desktop as an offline application, which does not check for updates. The app is not signed and security is disabled. The application seems to install fine when I run the setup.exe file. However, when I try to run the program from the start menu nothing happens. In the task manager, a process for the application appears for a few seconds then just goes away. The app window doesn't show and there aren't any indications of an error. If I navigate directly to the .exe of the app (%userprofile%\appdata\local\apps\2.0\%random id%......) and run it that way, it starts up and appears to function as designed. I've done some research and found that certain drivers and software (if installed) will cause this behavior (i.e. Kensington Mouse driver and Provencia software(?)). I've checked and I do not have either of these installed. Any help with this will be much appreciated.
Thanks in advance.
Sometimes, when I start debugging of android application in Visual Studio 2012 I can't see emulator image in select device window:
but emulator is already running:
The thing is that the problem is not in my application code or project settings because when i select Start emulator image, and new android virtual device is running, my application deploys successfully and is running correctly on NEW virtual device, BUT it takes a lot of time to load this new virtual device image and deploy application on it. Why doesn't Select device manages see already running virtual device image?
P.S. I deploy the simplest hello world activity, which is created by default when I start new Android Application project in Visual Studio 2012
This happens frequently.
From my informal experience... It seems sometimes to be related to VS and MonoDroid - but mostly it seems down to the Android SDK.
As the comment above suggests, switching VS off and on again can sometimes help.
Other things that can help are:
update to the latest version of Mono for Android - the Monkeys at Xamarin have added a Refresh button to the display
try using the command line adb tool in the SDK. This Android Debug Bridge includes kill-server and start-server switches - using these allows you to refresh the Android SDK's connections to devices.
For more on adb, see http://mobile.tutsplus.com/tutorials/android/android-adb-quick-guide/ and http://developer.android.com/tools/help/adb.html - it's a useful tool to know
If you do identify any clear bug in Mono for Android's connectivity, then please report it on http://bugzilla.xamarin.com