ios - CADObjectGetRelatedObjects failed with error Error Domain=NSMachErrorDomain Code=268435459 " -

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i download apple's official example code simpleekdemo, calendar relation project. run iphone, , when create event , edite it, add notes .in end, delete ,at time, console log error:
simpleekdemo[1335:907] cadobjectgetrelatedobjects failed error error domain=nsmacherrordomain code=268435459 "the operation couldn’t completed. (mach error 268435459 - (ipc/send) invalid destination port)"

i have question: no matter how operate it, function - (ekcalendar *)eventeditviewcontrollerdefaultcalendarfornewevents:(ekeventeditviewcontroller *)controller not called. why? when function called、


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