c# - MonoTouch - Could not load NIB in bundle: 'NSBundle' -

getting error saying not load nib in bundle: nsbundle when sub classed pageviewcontroller attempts load/display.

(see attached file screen shot)

i have tried deleting viewcontrollers , associated code , recreating them again scratch.

i have shut down iphone simulator , xamarin , restarted them in hope issue related to: could not load nib in bundle - inspiration needed no avail.

can point out possibly going wrong please?

note: onboardinghome , onboardingpage viewcontrollers created within ios designer , sub classes created each.

vc_onboardinghome.cs

using foundation; using system; using system.codedom.compiler; using uikit;  namespace performance { partial class vc_onboardinghome : uiviewcontroller {     private uipageviewcontroller pageviewcontroller;     private int pagecount = 3;      public vc_onboardinghome (intptr handle) : base (handle)     {     }      public override void viewdidload ()     {         base.viewdidload ();         vc_onboardpage firstpage = new vc_onboardpage();         firstpage.pageindex = 0;          pageviewcontroller = new uipageviewcontroller (             uipageviewcontrollertransitionstyle.pagecurl,              uipageviewcontrollernavigationorientation.horizontal,              uipageviewcontrollerspinelocation.min);          this.pageviewcontroller.setviewcontrollers (             new uiviewcontroller[] { firstpage },              uipageviewcontrollernavigationdirection.forward,              false,              s => {             }         );          this.pageviewcontroller.getnextviewcontroller = this.getnextviewcontroller;         //this.pageviewcontroller.getnextviewcontroller(this.pageviewcontroller, this);          this.pageviewcontroller.getpreviousviewcontroller = this.getpreviousviewcontroller;         //this.pageviewcontroller.getnextviewcontroller(this.pageviewcontroller, this);          this.pageviewcontroller.view.frame = this.view.bounds;         //this.view.addsubview(this.pageviewcontroller.view);         this.view.addsubview (pageviewcontroller.view);     }      private uiviewcontroller getnextviewcontroller(uipageviewcontroller pagecontroller, uiviewcontroller referenceviewcontroller)     {         vc_onboardpage currentpagecontroller = referenceviewcontroller vc_onboardpage;          if (currentpagecontroller.pageindex >= (this.pagecount - 1)){             return null;         }else{             int nextpageindex = currentpagecontroller.pageindex + 1;             vc_onboardpage vc_onboardpage = new vc_onboardpage ();             vc_onboardpage.pageindex = nextpageindex;             return vc_onboardpage;         }                }             private uiviewcontroller getpreviousviewcontroller(uipageviewcontroller pagecontroller, uiviewcontroller referenceviewcontroller)     {         vc_onboardpage currentpagecontroller = referenceviewcontroller vc_onboardpage;          if (currentpagecontroller.pageindex <= 0){             return null;         }else{             int previouspageindex = currentpagecontroller.pageindex - 1;             vc_onboardpage vc_onboardpage = new vc_onboardpage ();             vc_onboardpage.pageindex = previouspageindex;             return vc_onboardpage;         }                }      public override void didreceivememorywarning ()     {         // releases view if doesn't have superview.         base.didreceivememorywarning ();          // release cached data, images, etc aren't in use.     } } } 

vc_onboardpage.cs

using foundation; using system; using system.codedom.compiler; using uikit;  namespace performance { partial class vc_onboardpage : uiviewcontroller {     private int pageindex;      public int pageindex     {         get;         set;     }      // public vc_onboardpage (intptr handle) : base (handle)     public vc_onboardpage () : base("vc_onboardpage", null)     {         console.writeline ("page -> _constructor");         // this.pageindex = this.;     }      public override void didreceivememorywarning ()     {         // releases view if doesn't have superview.         base.didreceivememorywarning ();          // release cached data, images, etc aren't in use.     }      public override void viewdidload ()     {         base.viewdidload ();         lbl_headertxt.text = "label here";         console.writeline ("page -> viewdidload");          // perform additional setup after loading view, typically nib.         // this.imgview.image = uiimage.fromfile(string.format("images/{0}.jpg", this.pageindex + 1));         lbl_headertxt.text = string.format("page {0}", this.pageindex + 1);     }      public override void viewdidappear (bool animated)     {         base.viewdidappear (animated);          console.writeline ("page -> viewdidappear");     } } } 

stacktrace

2015-07-27 14:13:07.663 performance[8146:1518846] page -> _constructor 2015-07-27 14:13:11.291 performance[8146:1518846] unhandled managed exception: objective-c exception thrown.  name: nsinternalinconsistencyexception reason: not load nib in bundle: 'nsbundle </users/johncogan/library/developer/coresimulator/devices/116bf4aa-5d28-4b3a-91f2-b9fa4fbfdee8/data/containers/bundle/application/5bd82ba5-65ee-496f-8bce-887fec5522ad/performance.app> (loaded)' name 'vc_onboardpage' (foundation.monotouchexception)     @ objcruntime.runtime.thrownsexception (intptr ns_exception) [0x00000] in /users/builder/data/lanes/1962/8b265d64/source/maccore/src/objcruntime/runtime.cs:167      @ objcruntime.runtime.throw_ns_exception (intptr exc) [0x00000] in /users/builder/data/lanes/1962/8b265d64/source/maccore/runtime/delegates.generated.cs:100      @ (wrapper native-to-managed) objcruntime.runtime:throw_ns_exception (intptr)     @ (wrapper managed-to-native) objcruntime.messaging:void_objc_msgsend_intptr_int_bool_intptr (intptr,intptr,intptr,int,bool,intptr)     @ uikit.uipageviewcontroller.setviewcontrollers (uikit.uiviewcontroller[] viewcontrollers, uipageviewcontrollernavigationdirection direction, boolean animated, uikit.uicompletionhandler completionhandler) [0x0005f] in /users/builder/data/lanes/1962/8b265d64/source/maccore/src/build/ios/native/uikit/uipageviewcontroller.g.cs:148      @ performance.vc_onboardinghome.viewdidload () [0x00055] in /users/johncogan/development/xamarin/performance_shared/performance/vc_onboardinghome.cs:28      @ (wrapper managed-to-native) uikit.uiapplication:uiapplicationmain (int,string[],intptr,intptr)     @ uikit.uiapplication.main (system.string[] args, intptr principal, intptr delegate) [0x00005] in /users/builder/data/lanes/1962/8b265d64/source/maccore/src/uikit/uiapplication.cs:63      @ uikit.uiapplication.main (system.string[] args, system.string principalclassname, system.string delegateclassname) [0x00038] in /users/builder/data/lanes/1962/8b265d64/source/maccore/src/uikit/uiapplication.cs:47      @ performance.application.main (system.string[] args) [0x00008] in /users/johncogan/development/xamarin/performance_shared/performance/main.cs:14  2015-07-27 14:13:11.292 performance[8146:1518846] critical: stacktrace: 

i assume using storyboard , editing in xamarin's built-in ios designer.

how did add viewcontrollers project? in experience, 1 of fail-safest ways in xamarin's ios designer specify class name in properties of view controller.

this generate new vc-class this:

partial class vc_test : uiview {     public vc_test (intptr handle) : base (handle)     {     } } 

note constructor invokes base constructor intptr argument. contrast constructor, invokes string argument:

// public vc_onboardpage (intptr handle) : base (handle) public vc_onboardpage () : base("vc_onboardpage", null) 

when last checked, string arguments valid when using nibs/xibs, not used ios designer. suspect may source of problem, string "vc_onboardpage" mentioned in error message.

i'd try , following:

• rename view's 'class'-property in ios designer new name.
• clean , rebuild solution

feel free comment.