In Core data unable to store objects - ios

Question

My code here i am trying to add list of object in to my array form that array i trying to add it to code data attributes.
#import "ViewController.h"
#import "model.h"
#import "coredataManager.h"
#interface ViewController ()
{
NSMutableArray *entries;
}
#end
#implementation ViewController
- (void)viewDidLoad
{
entries = [[NSMutableArray alloc]init];
coredataManager *coreobj = [[coredataManager alloc]init];
model *obj = [[model alloc]initWithContents:#"1" alternateLink:#"1" DownloadURL:#"1"];
model *obj2 = [[model alloc]initWithContents:#"2" alternateLink:#"2" DownloadURL:#"2"];
model *obj3 = [[model alloc]initWithContents:#"3" alternateLink:#"3" DownloadURL:#"3"];
[entries addObject:obj];
[entries addObject:obj2];
[entries addObject:obj3];
NSLog(#"%#",entries);
[coreobj StoreValues:entries];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
my NSObject Class
#import <Foundation/Foundation.h>
#interface model : NSObject
#property(copy)NSString *filename;
#property(copy)NSString *alternatelink;
#property(copy)NSString *downloadurl;
-(id)initWithContents:(NSString *)Fname alternateLink :(NSString *) ALink DownloadURL :(NSString *)DURL;
#end
NSObject Implementation File
#import "model.h"
#implementation model
#synthesize downloadurl,filename,alternatelink;
-(id)initWithContents:(NSString *)Fname alternateLink :(NSString *) ALink DownloadURL :(NSString *)DURL
{
if ((self = [super init])) {
downloadurl = [DURL copy];
filename = [Fname copy];
alternatelink = [ALink copy];
}
return self;
}
#end
Code to store in core data
-(void)StoreValues:(NSMutableArray *) sample
{
Sample *value = [NSEntityDescription insertNewObjectForEntityForName:#"Sample"
inManagedObjectContext:self.managedObjectContext];
for (int i=0;i<sample.count;i++)
{
model *obj=[sample objectAtIndex:i];
value.url = obj.downloadurl;
value.filename = obj.filename;
value.alternate = obj.alternatelink;
}
NSError *error;
if (![self.managedObjectContext save:&error]) {
NSLog(#"Whoops, couldn't save: %#", [error localizedDescription]);
}
}
But only the last value of the array is getting stored in the core data can any one guide me solve this issue
Thanks in advance.

Answer 1

Before you save, you rewrite the object. Do this instead:
Sample *value;
for (int i=0;i<sample.count;i++)
{
value = [NSEntityDescription insertNewObjectForEntityForName:#"Sample"
inManagedObjectContext:self.managedObjectContext];
model *obj=[sample objectAtIndex:i];
value.url = obj.downloadurl;
value.filename = obj.filename;
value.alternate = obj.alternatelink;
NSError *error;
if (![self.managedObjectContext save:&error]) {
NSLog(#"Whoops, couldn't save: %#", [error localizedDescription]);
}
}
That saves the object after every iteration and doesn't rewrite it. Then starts anew.