ios - Unable to understand the Crash Logs -


i have view,which consists uiscrollview on subviews added in viewdidload after adding subviews & after execution of custom methods goes viewwillappear,after crashes following traces:

terminating app due uncaught exception 'nsinvalidargumentexception', reason: '-[__nscfstring ciimage]: unrecognized selector sent instance 0x7db5bb80' *** first throw call stack: (     0   corefoundation                      0x04614946 __exceptionpreprocess + 182     1   libobjc.a.dylib                     0x0429da97 objc_exception_throw + 44     2   corefoundation                      0x0461c5c5 -[nsobject(nsobject) doesnotrecognizeselector:] + 277     3   corefoundation                      0x045653e7 ___forwarding___ + 1047     4   corefoundation                      0x04564fae _cf_forwarding_prep_0 + 14     5   uikit                               0x02b589f1 -[uiimageview _shoulddrawimage:] + 33     6   uikit                               0x02b58aa2 -[uiimageview _candrawcontent] + 164     7   uikit                               0x02a2f750 -[uiview(internal) _shouldinheritscreenscaleascontentscalefactor] + 83     8   uikit                               0x02a2f7e9 -[uiview(internal) _applyscreenscaletocontentscalefactorifnotspecifiedbydeveloper] + 35     9   uikit                               0x02a2f56e -[uiview(internal) _didmovefromwindow:towindow:] + 1628     10  uikit                               0x02b5d762 -[uiimageview _didmovefromwindow:towindow:] + 65     11  uikit                               0x02a2f23f -[uiview(internal) _didmovefromwindow:towindow:] + 813     12  uikit                               0x02a423e1 -[uiscrollview _didmovefromwindow:towindow:] + 65     13  uikit                               0x02a2f23f -[uiview(internal) _didmovefromwindow:towindow:] + 813     14  uikit                               0x02a2f23f -[uiview(internal) _didmovefromwindow:towindow:] + 813     15  uikit                               0x02a26517 __45-[uiview(hierarchy) _postmovedfromsuperview:]_block_invoke + 154     16  uikit                               0x02a26475 -[uiview(hierarchy) _postmovedfromsuperview:] + 458     17  uikit                               0x02a31f0d -[uiview(internal) _addsubview:positioned:relativeto:] + 2018     18  uikit                               0x02a2486e -[uiview(hierarchy) addsubview:] + 56     19  uikit                               0x0299d0fa __53-[_uinavigationparallaxtransition animatetransition:]_block_invoke + 1849     20  uikit                               0x02a2b7af +[uiview(animation) performwithoutanimation:] + 82     21  uikit                               0x0299c5a6 -[_uinavigationparallaxtransition animatetransition:] + 1204     22  uikit                               0x02b2b64d -[uinavigationcontroller _startcustomtransition:] + 3765     23  uikit                               0x02b38726 -[uinavigationcontroller _startdeferredtransitionifneeded:] + 712     24  uikit                               0x02b39372 -[uinavigationcontroller __viewwilllayoutsubviews] + 57     25  uikit                               0x02cad04c -[uilayoutcontainerview layoutsubviews] + 213     26  uikit                               0x02a34dd1 -[uiview(calayerdelegate) layoutsublayersoflayer:] + 608     27  libobjc.a.dylib                     0x042b3771 -[nsobject performselector:withobject:] + 70     28  quartzcore                          0x0215928f -[calayer layoutsublayers] + 152     29  quartzcore                          0x0214d115 _zn2ca5layer16layout_if_neededepns_11transactione + 397     30  quartzcore                          0x0214cf70 _zn2ca5layer28layout_and_display_if_neededepns_11transactione + 26     31  quartzcore                          0x020ab3c6 _zn2ca7context18commit_transactionepns_11transactione + 284     32  quartzcore                          0x020ac78c _zn2ca11transaction6commitev + 392     33  quartzcore                          0x020ace58 _zn2ca11transaction17observer_callbackep19__cfrunloopobservermpv + 92     34  corefoundation                      0x045379de __cfrunloop_is_calling_out_to_an_observer_callback_function__ + 30     35  corefoundation                      0x04537920 __cfrunloopdoobservers + 400     36  corefoundation                      0x0452d35a __cfrunlooprun + 1226     37  corefoundation                      0x0452cbcb cfrunlooprunspecific + 443     38  corefoundation                      0x0452c9fb cfrunloopruninmode + 123     39  graphicsservices                    0x05e6b24f gseventrunmodal + 192     40  graphicsservices                    0x05e6b08c gseventrun + 104     41  uikit                               0x029a98b6 uiapplicationmain + 1526     42  popcorn                             0x000e9472 main + 130     43  libdyld.dylib                       0x06193ac9 start + 1 ) libc++abi.dylib: terminating uncaught exception of type nsexception

terminating app due uncaught exception 'nsinvalidargumentexception', reason: '-[__nscfstring ciimage]: unrecognized selector sent instance 0x7db5bb80'

you're accessing ciimage property of nsstring (perhaps id , accessed property thinking id object uiimage). search ciimage in class , make sure object you're getting property actual uiimage.


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