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2014/10/15 ¤U¤È 10:08:57
iphone Programming Glossary: fetchrequestHow to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll Set up the fetched results controller. Create the fetch request for the entity. NSFetchRequest fetchRequest NSFetchRequest alloc init Edit the entity name as appropriate. NSEntityDescription callEntity MTCall.. NSEntityDescription callEntity MTCall entityInManagedObjectContext self.managedObjectContext fetchRequest setEntity callEntity NSMutableArray predicateArray NSMutableArray array if searchString.length your.. nil else filterPredicate NSCompoundPredicate orPredicateWithSubpredicates predicateArray fetchRequest setPredicate filterPredicate Set the batch size to a suitable number. fetchRequest setFetchBatchSize..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll here NSPredicate filterPredicate your predicate here Set up the fetched results controller. Create the fetch request for the entity. NSFetchRequest fetchRequest NSFetchRequest alloc init Edit the entity name as appropriate. NSEntityDescription callEntity MTCall entityInManagedObjectContext self.managedObjectContext fetchRequest.. NSFetchRequest alloc init Edit the entity name as appropriate. NSEntityDescription callEntity MTCall entityInManagedObjectContext self.managedObjectContext fetchRequest setEntity callEntity NSMutableArray predicateArray NSMutableArray array if searchString.length your search predicate s are added to this array predicateArray addObject.. NSCompoundPredicate orPredicateWithSubpredicates predicateArray nil else filterPredicate NSCompoundPredicate orPredicateWithSubpredicates predicateArray fetchRequest setPredicate filterPredicate Set the batch size to a suitable number. fetchRequest setFetchBatchSize 20 fetchRequest setSortDescriptors sortDescriptors Edit the..
I keep on getting “save operation failure” after any change on my XCode Data Model http://stackoverflow.com/questions/1091228/i-keep-on-getting-save-operation-failure-after-any-change-on-my-xcode-data-mod context fetchedResultsController managedObjectContext NSEntityDescription entity fetchedResultsController fetchRequest entity NSManagedObject newManagedObject NSEntityDescription insertNewObjectForEntityForName entity name inManagedObjectContext.. context fetchedResultsController managedObjectContext NSEntityDescription entity fetchedResultsController fetchRequest entity Evaluation evaluation Evaluation NSEntityDescription insertNewObjectForEntityForName entity name inManagedObjectContext..
NSFetchedResultsController with sections created by first letter of a string http://stackoverflow.com/questions/1112521/nsfetchedresultscontroller-with-sections-created-by-first-letter-of-a-string alloc initWithKey @ personName ascending YES NSArray sortDescriptors NSArray alloc initWithObjects orderDescriptor nil fetchRequest setSortDescriptors sortDescriptors Edit the section name key path and cache name if appropriate. nil for section name key.. sections . NSFetchedResultsController aFetchedResultsController NSFetchedResultsController alloc initWithFetchRequest fetchRequest managedObjectContext managedObjectContext sectionNameKeyPath @ personName cacheName @ Root .... iphone ios objective c.. as appropriate. NSSortDescriptor nameInitialSortOrder NSSortDescriptor alloc initWithKey @ committeeName ascending YES fetchRequest setSortDescriptors NSArray arrayWithObject nameInitialSortOrder NSFetchedResultsController aFetchedResultsController NSFetchedResultsController..
How to use the first character as a section name http://stackoverflow.com/questions/1741093/how-to-use-the-first-character-as-a-section-name NSFetchedResultsController aFetchedResultsController NSFetchedResultsController alloc initWithFetchRequest fetchRequest managedObjectContext managedObjectContext sectionNameKeyPath @ name.firstLetter cacheName @ Root Thanks. EDIT I'm not sure.. has this limitation If this key path is not the same as that specified by the first sort descriptor in fetchRequest they must generate the same relative orderings. For example the first sort descriptor in fetchRequest might specify the.. descriptor in fetchRequest they must generate the same relative orderings. For example the first sort descriptor in fetchRequest might specify the key for a persistent property sectionNameKeyPath might specify a key for a transient property derived..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll your predicate here Set up the fetched results controller. Create the fetch request for the entity. NSFetchRequest fetchRequest NSFetchRequest alloc init Edit the entity name as appropriate. NSEntityDescription callEntity MTCall entityInManagedObjectContext.. name as appropriate. NSEntityDescription callEntity MTCall entityInManagedObjectContext self.managedObjectContext fetchRequest setEntity callEntity NSMutableArray predicateArray NSMutableArray array if searchString.length your search predicate s.. predicateArray nil else filterPredicate NSCompoundPredicate orPredicateWithSubpredicates predicateArray fetchRequest setPredicate filterPredicate Set the batch size to a suitable number. fetchRequest setFetchBatchSize 20 fetchRequest setSortDescriptors..
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