NSManagedObjectSubClass का उपयोग कर CoreData बेस से सभी रिकॉर्ड कैसे प्राप्त करें?

Question

मैं ios आवेदन में CoreData लागू करने के लिए कोशिश कर रहा हूँ, अब मैं इकाई MUSTHAFA से

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 

डाटा

कोर करने के लिए रिकॉर्ड्स जोड़ना सभी रिकॉर्ड लायें करना चाहते हैं

-(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 "); 
     }  
} 

कोर डेटा से सभी मानों को पुनः प्राप्त करना जैसे * डीबीटीबल से चुनें *;

-(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; 


} 

घटना (MUSTAHFA का उदाहरण) का उपयोग कैसे डाटा बेस से सभी रिकॉर्ड लाने कर सकते हैं? ;:

Answer 1

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]; 

Answer 2

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 
}