Comment obtenir tous les enregistrements à partir de CoreData Base en utilisant NSManagedObjectSubClass?

Je suis en train de mettre en œuvre CoreData dans ios Application,Maintenant je veux Récupérer tous les enregistrements de l'Entité MUSTHAFA

  My  NSManagedObjectedSubClass is MUSTAHFA

MUSTHAFA.m

#import <Foundation/Foundation.h>
#import <CoreData/CoreData.h>

@interface MUSTHAFA : NSManagedObject {
@private
}
@property (nonatomic, retain) NSString * FirstName;
@property (nonatomic, retain) NSNumber * Age;
@property (nonatomic, retain) NSString * Location;
@property (nonatomic, retain) NSString * LastName;

@end

#import "MUSTHAFA.h"


@implementation MUSTHAFA
@dynamic FirstName;
@dynamic Age;
@dynamic Location;
@dynamic LastName;

@end

L'ajout d'Enregistrements de Base de Données

-(void)AddRecordToCoreData{

    //NSLog(@"______ ADD Core Data Implementaion");  
    MUSTHAFA *event = (MUSTHAFA *)[NSEntityDescription insertNewObjectForEntityForName:@"MUSTHAFA" inManagedObjectContext:managedObjectContext];
    [event setLastName:@"JOHN"];
    [event setFirstName:@"JOSE "];
    [event setLocation:@"IDUKKI "];
    [event setAge:[NSNumber numberWithInt:25]];    
    NSError *error;
    if (![managedObjectContext save:&error]) 
        {       
        NSLog(@"Error..%@",error);
    }
       else
       {
        NSLog(@"Data added to MUSTHAFA ");
       }      
}

Récupérer toutes les Valeurs de Base de Données comme select * from dbTable;

-(void)FetchRecordFromCoreData:(id)data1{

     //NSLog(@"______ Fetch Core Data Implementaion");  
    MUSTHAFA *event = (MUSTHAFA *)[NSEntityDescription insertNewObjectForEntityForName:@"MUSTHAFA" inManagedObjectContext:managedObjectContext];

   //USING event how can fetch all record from Data base;


}

AIDE de l'événement (Exemple de MUSTAHFA) comment pouvez récupérer tous les enregistrer à partir de la base de Données?

source d'informationauteur Musthafa

  1. 27
    NSManagedObjectContext *context = //Get it from AppDelegate

NSFetchRequest *request = [[NSFetchRequest alloc]initWithEntityName:@"MUSTHAFA"];

NSError *error = nil;

NSArray *results = [context executeFetchRequest:request error:&error];

if (error != nil) {

   //Deal with failure
}
else {

   //Deal with success
}

[request release];
  2. 7
    AppDelegate *delegate = [UIApplication sharedApplication].delegate;

NSManagedObjectContext *context =[delegate managedObjectContext];

NSFetchRequest *request = [[NSFetchRequest alloc]initWithEntityName:@"Channels"];

NSError *error = nil;
NSArray *results = [context executeFetchRequest:request error:&error];

ChannelDBArray=[[NSMutableArray alloc]init];

for (NSManagedObject *obj in results) {


    NSArray *keys = [[[obj entity] attributesByName] allKeys];
    NSDictionary *dictionary = [obj dictionaryWithValuesForKeys:keys];

}
if (error != nil) {

    //Deal with failure
}
else {

    //Deal with success
}