petersteinberger.com

Update: This is even trickier! Don’t forget thread savety in mergeContextChanges, or it will crash absolutely unpredictable! This was a tricky one. If you edit a context in another thread and save it, your main context does not get the change notifications. You can either refetch the data (into a fetchedResultsController for example) OR you [...]

ObjC’s concept of categories has some problems when you use it too much – name conflicts! Best practice is to prefix your own private categories (as there are no name spaces). And you should really do that – some iPhone Apps are rejected currently for using categories that override default code. Set the environment variable OBJC_PRINT_REPLACED_METHODS [...]

Some notes I thought they are important, delivered to you from Hamburg design with ui in mind normalisation <-> denormalisation willful introduction of repetition for performance dont do inheritance put blogs where they belong prefetching to get attributes more instantly setrelationshipkeypathsforprefetching, pass nsarray with “Songs” … batching: only deal with whats needed [fetch setFetchBatchSize:10] Nsarray [...]