ios - CoreData detecting deleted entity after save -

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this question has answer here:

if delete cd entity , save mod

[self.moc deleteobject:(nsmanagedobject *)somecdentity];  [self savemoc];

the pointers cd entity become faults

by trying accessing fault or ask isdeleted, 

'coredata not fulfill fault

the problem is, save mod, isdeleted doesn't work more

so how can detect if entity removed? because asking isfault, doesn't indicate deleted... , cannot use isdeleted

i found in osx oriented thread

how can tell whether `nsmanagedobject` has been deleted?

- (bool) entitywasdeleted:(someentity *)someentity {      return ((someentity == nil) || ([self.moc existingobjectwithid:someentity.objectid error:null] == nil)); }

beware : don't use code bellow, might not work

if (managedobject.managedobjectcontext == nil) {     // assume managed object has been deleted = might not work }

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