当应用程序崩溃时，IOS App CoreData会重置

Question

On the device when the application is running and an error occurs, the application is closed and back to start, and sometimes the data I saved in CoreData has been removed. I am currently using MagicalRecord (2.2) to CoreData

An example of how I'm using CoreData with MagicalRecord :

- (void)deletePlaylistData:(NSDictionary *)playlist {

   PlaylistOffline *object = [PlaylistOffline MR_findFirstByAttribute:@"id" withValue:playlist[@"id"]];

   if (object) {

      [object MR_deleteEntity];
      [[NSManagedObjectContext MR_defaultContext] MR_saveToPersistentStoreAndWait];

   } else {
       NSLog(@"Error al eliminar Playlist");
   }
}

I'm new to Objective-C and I hope your help thanks, Excuse my English by Google translator

Answer 1

No crash will cause data to be deleted from disk. There is simply no connection between the two.

If you are creating objects but not saving them via -[NSManagedObjectContext save:] then they are not being written to disk.

If you are using UIManagedDocument , stop. Use the template provided Core Data stack from Apple.

But, in the end, do what @Wain suggested. Fix the crash.

If you are getting a crash as part of the save, then post the crash log so we can assist with that.