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2014/10/15 ¤U¤È 10:11:36

iphone Programming Glossary: mutablesetvalueforkey

Illegal attempt to establish a relationship 'xyz' between objects in different contexts

http://stackoverflow.com/questions/1554623/illegal-attempt-to-establish-a-relationship-xyz-between-objects-in-different-c

For example NSManagedObject book get a book in one MOC NSManagedObject owner get an owner in a different MOC owner mutableSetValueForKey @ books addObject owner.managedObjectContext objectWithID book objectID So what you're doing is actually fetching the Book..

One to Many relationships iPhone - NSPredicate core data query

http://stackoverflow.com/questions/1770646/one-to-many-relationships-iphone-nspredicate-core-data-query

@ Event inManagedObjectContext app.managedObjectContext NSMutableSet eventsArray calender mutableSetValueForKey @ Events eventsArray addObject newEvent app.managedObjectContext processPendingChanges return newEvent I changed the relationship..

Where can I find a good example of a Core Data to-many relationship?

http://stackoverflow.com/questions/5399195/where-can-i-find-a-good-example-of-a-core-data-to-many-relationship

using a mutableSetForKey expanding everything out to see the detail would like so NSMutableSet muteSet anEntityAObj mutableSetValueForKey @ bees muteSet addObject aNewBObj anEntityAObj setValueForKey @ bees ...or more compactly anEntityAObj mutableSetValueForKey.. @ bees muteSet addObject aNewBObj anEntityAObj setValueForKey @ bees ...or more compactly anEntityAObj mutableSetValueForKey @ bees addObject aNewBObj If you set from the EntityB side however you are only adding a single object so you can just use..

Reading a plist into core data - NSDictionary within NSDictionary

http://stackoverflow.com/questions/6738826/reading-a-plist-into-core-data-nsdictionary-within-nsdictionary

pointer types. the compiler seemed to want an NSSet so I tried NSSet thisGardenPlantsSet thisGardenDictionary mutableSetValueForKey @ steps NSLog @ thisGardenPlantsSet contains i sets. thisGardenPlantsSet count gardenManObj setValue thisGardenPlantsSet..

Drawing Smooth Curves - Methods Needed

http://stackoverflow.com/questions/8702696/drawing-smooth-curves-methods-needed

newPoint setCGPoint CGPoint newPoint setOrder NSNumber numberWithUnsignedInteger self points count self mutableSetValueForKey @ points addObject newPoint NSMutableArray self pointsOrdered addObject newPoint self bezierPath addLineToPoint CGPoint..