ios - Present UIViewController from subclass of UIView -

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i have created subclass of uiview, in app need present uiviewcontroller it,

i have tried following :

poiinfocontroller = [[poiinfocontroller alloc]initwithnibname:@"poiinfocontroller" bundle:nil]; [poiinfocontroller setmodalpresentationstyle:uimodalpresentationformsheet]; [[[[uiapplication sharedapplication] keywindow] rootviewcontroller] presentmodalviewcontroller:poiinfocontroller animated:yes];

but crash terminating app due uncaught exception 'nsinvalidargumentexception', reason: 'application tried present modally active controller .'

please help,

**edit crash log:**  2014-04-23 17:04:26.433 navigationlibsprintmom[4610:a0b] *** terminating app due uncaught exception 'nsinvalidargumentexception', reason: 'application tried present modally active controller <viewcontroller: 0x9d52140>.' *** first throw call stack: (     0   corefoundation                      0x017c15e4 __exceptionpreprocess + 180     1   libobjc.a.dylib                     0x014d08b6 objc_exception_throw + 44     2   uikit                               0x0036217a -[uiviewcontroller presentviewcontroller:withtransition:completion:] + 4879     3   uikit                               0x00362caf -[uiviewcontroller presentviewcontroller:animated:completion:] + 130     4   navigationlibsprintmom              0x00005f7b -[navigationview handlegesture:] + 964     5   uikit                               0x005baf8c _uigesturerecognizersendactions + 230     6   uikit                               0x005b9c00 -[uigesturerecognizer _updategesturewithevent:buttonevent:] + 383     7   uikit                               0x005bb66d -[uigesturerecognizer _delayedupdategesture] + 60     8   uikit                               0x005bebcd ___uigesturerecognizerupdate_block_invoke + 57     9   uikit                               0x005beb4e _uigesturerecognizerremoveobjectsfromarrayandapplyblocks + 317     10  uikit                               0x005b5248 _uigesturerecognizerupdate + 199     11  uikit                               0x00281d4a -[uiwindow _sendgesturesforevent:] + 1291     12  uikit                               0x00282c6a -[uiwindow sendevent:] + 1030     13  uikit                               0x00256a36 -[uiapplication sendevent:] + 242     14  uikit                               0x00240d9f _uiapplicationhandleeventqueue + 11421     15  corefoundation                      0x0174a8af __cfrunloop_is_calling_out_to_a_source0_perform_function__ + 15     16  corefoundation                      0x0174a23b __cfrunloopdosources0 + 235     17  corefoundation                      0x0176730e __cfrunlooprun + 910     18  corefoundation                      0x01766b33 cfrunlooprunspecific + 467     19  corefoundation                      0x0176694b cfrunloopruninmode + 123     20  graphicsservices                    0x038699d7 gseventrunmodal + 192     21  graphicsservices                    0x038697fe gseventrun + 104     22  uikit                               0x0024394b uiapplicationmain + 1225     23  navigationlibsprintmom              0x0000374d main + 141     24  libdyld.dylib                       0x01f54725 start + 0     25  ???                                 0x00000001 0x0 + 1 ) libc++abi.dylib: terminating uncaught exception of type nsexception


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