Implementaion Class

#import <UIKit/UIKit.h>

@interface NSOperationalQueueViewController : UIViewController {

    NSMutableArray *urlArray;
    NSOperationQueue *operationQueue;
}

+(id)getParent;

@end



#import "NSOperationalQueueViewController.h"
#import <AssetsLibrary/AssetsLibrary.h>
#import "DisplayImages.h"

@implementation NSOperationalQueueViewController

- (void)viewDidLoad {

    urlArray = [[NSMutableArray alloc] init];

    void (^assetEnumerator)(struct ALAsset *, NSUInteger, BOOL *) = ^(ALAsset *result, NSUInteger index, BOOL *stop){

        if(result != NULL){

            NSURL *url = [[result defaultRepresentation] url];
            [urlArray addObject:url];
        }
    };

    void (^assetGroupEnumerator)(struct ALAssetsGroup *, BOOL *) =  ^(ALAssetsGroup *group, BOOL *stop) {

        if(group != nil){

            [group enumerateAssetsUsingBlock:assetEnumerator];
        }
        else{
            operationQueue = [[NSOperationQueue alloc] init];

            float Xcord = 10.0;

            float yCord = 5.0;

        for (int index = 0; index < 8; index++){

        if (index != 0)
            Xcord = Xcord + (index * 10) + 50 ;


                UIImageView * imageView = [[UIImageView alloc] initWithFrame:CGRectMake(Xcord,yCord, 50, 50)];
                [imageView setBackgroundColor:[UIColor blueColor]];
                [self.view addSubview:imageView];

                NSURL *imageUrl = [urlArray objectAtIndex:index];

                DisplayImages *displayImages = [[DisplayImages alloc] initWithAttributes:imageUrl ImageView:imageView];
                [operationQueue addOperation:displayImages];
                [displayImages release];

                [imageView release];
                imageView = nil;
            }
        }
    };

    ALAssetsLibrary* assetslibrary = [[[ALAssetsLibrary alloc] init] autorelease];
    [assetslibrary enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:assetGroupEnumerator failureBlock: ^(NSError *error) {

        NSLog(@"Failure");

   }];

    [super viewDidLoad];
}


+(id)getParent{

    return self
}

- (void)dealloc {

    [urlArray release];
    urlArray = nil;

        [super dealloc];
}

@end