ios - AVFoundation and other frameworks causing "exception" with Core Data app -


when add various frameworks, pictured below (the ones marked in red), app throws exception @ save. when app restarted data lost.

i creating document based cored data app. seems ok until add frameworks needed finish app. "exception" mean if add "all exceptions" breakpoint app stop if try save core data managed document. if ignore exception works until restart app, @ point document recreated , saved data lost. frameworks seem conflicting core data setup : avfoundation, twitter, , social.

enter image description here

note: (extra info may helpful) if build app , add add these frameworks rebuild, works fine expected. when delete app device rebuild these frameworks included exception , issue described.

strangely, autosave seems work fine. it's when use: [mymanageddocument savetourl:mymanageddocument.fileurl forsaveoperation:uidocumentsaveforoverwriting completionhandler:handler]; exception.


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