Objective_C Exception Thrown when debugging Xamarin C# iOS App

Question

When I go to build and debug my iOS app, the simulator runs but I get an exception thrown and the simulator doesn't open. I'm using Visual Studio for Mac.

The error is:

Objective-C exception thrown.Name: NSInvalidArgumentException Reason:  
Could not find a storyboard named 'Main' in bundle NSBundle 
</Users/(Username 
here)/Library/Developer/CoreSimulator/Devices/23E98CA3-FC40-4AA4-8AAD-
62A9FADE1118/data/Containers/Bundle/Application/715B09C7-FBF2-41E6-
8FCD-A6329DE9E758/(AppName Here).app> (loaded)
Native stack trace:
    0   CoreFoundation                      0x0000000108f31b0b
__exceptionPreprocess + 171
    1   libobjc.A.dylib                     0x0000000113b0e141 
objc_exception_throw + 48
    2   UIKit                               0x000000010d005cfb +
[UIStoryboard storyboardWithName:bundle:] + 663
    3   UIKit                               0x000000010c84590d -
[UIApplication _loadMainStoryboardFileNamed:bundle:] + 72
    4   UIKit                               0x000000010c845e13 -
[UIApplication _loadMainInterfaceFile] + 260
    5   UIKit                               0x000000010c8444b6 -
[UIApplication _runWithMainScene:transitionContext:completion:] + 1407
    6   UIKit                               0x000000010c8417f3 -
[UIApplication workspaceDidEndTransaction:] + 182
    7   FrontBoardServices                  0x00000001168265f6 
__FBSSERIALQUEUE_IS_CALLING_OUT_TO_A_BLOCK__ + 24
    8   FrontBoardServices                  0x000000011682646d -
[FBSSerialQueue _performNext] + 186
    9   FrontBoardServices                  0x00000001168267f6 -
[FBSSerialQueue _performNextFromRunLoopSource] + 45
    10  CoreFoundation                      0x0000000108ed7c01 
__CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
    11  CoreFoundation                      0x0000000108ebd0cf 
__CFRunLoopDoSources0 + 527
    12  CoreFoundation                      0x0000000108ebc5ff 
__CFRunLoopRun + 911
    13  CoreFoundation                      0x0000000108ebc016 
CFRunLoopRunSpecific + 406
    14  UIKit                               0x000000010c84008f -
[UIApplication _run] + 468
    15  UIKit                               0x000000010c846134 
UIApplicationMain + 159
    16  ???                                 0x000000012bee336c 0x0 + 
5031998316
    17  ???                                 0x0000000128fc6abd 0x0 + 
4982598333

Thanks, Z

Edit:

Adding picture.

Info.plist

score 1 · Answer 1 · answered Jul 21 '17 at 02:56

1

It seems like no main.storyboard can be found in your project. Check this

if the Main Interface is Main , check if main.storyboard exsits in your project. Or you can change it to other viewController.

answered Jul 21 '17 at 02:56

ColeX

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Hi, thanks for the information. I checked and Main is my Main interface and I have a main.storyboard in my project, which is why it's so weird. I will edit my post to include picture. Thank you! – Zailyn Tamayo Jul 21 '17 at 15:14
try to new a storyboard and set it main interface to see if the issue still exsits – ColeX Jul 21 '17 at 15:26
I added a new storyboard and set it to main and now I get the same error but it lists the name of the new board. :/ – Zailyn Tamayo Jul 21 '17 at 15:35
if a new project has this error，maybe there was something wrong with the installation ，try to reinstall . – ColeX Jul 21 '17 at 15:39
Yes, I have made new project and get this error. I thought it was something to do with XCode so I reinstalled that. I will reinstall Visual Studio and report back. Thanks. – Zailyn Tamayo Jul 21 '17 at 15:41
Okay, I reinstalled, created a new project, and I still get the same error. Maybe I didn't completely uninstall because it showed my deleted projects when it started up again? I did restart after removing the application. – Zailyn Tamayo Jul 21 '17 at 15:56
I have completely uninstalled XCode and Visual Studio from my Mac and reinstalled. I still get the same error. I am really confused. I get this error on new projects. Not sure what to do other then completely restore my Mac. – Zailyn Tamayo Jul 22 '17 at 02:40
I guess something uncorrect in the configuration . check every steps how to install in official toturial. – ColeX Jul 22 '17 at 05:49

score 0 · Accepted Answer · answered Jul 22 '17 at 05:46

Okay, the weirdest thing fixed it. I installed an older version of Xarmarin iOS that I got from this page: https://bugzilla.xamarin.com/show_bug.cgi?id=38206

Then when I opened Visual Studio it didn't detect it and had me update it. After updating it, my app was able to debug and the simulator worked fine! Very, very weird!

Objective_C Exception Thrown when debugging Xamarin C# iOS App

2 Answers2