Work With Asset Libery ios 5 in Ios/Iphone

LAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
NSString *photoName;
NSString *photoUrl;

 NSAutoreleasePool *pool = [[NSAutoreleasePool alloc]init];
    void (^assetEnumerator)(ALAsset *, NSUInteger, BOOL *) =

 ^(ALAsset *result, NSUInteger index, BOOL *stop)
    {
        if(result != NULL)
        {
            NSArray *arrKeys = [[result valueForProperty:

 ALAssetPropertyURLs]allKeys];            
            if([[result valueForProperty:ALAssetPropertyType]

 isEqualToString:ALAssetTypePhoto])
            {
                if([[UIDevice currentDevice] systemVersion]>=5.0))
                {
                    photoName = [[result defaultRepresentation]UTI];

                }
                else
                {
                    photoName = [[result defaultRepresentation]filename];

                }
                //Your code here
                photoUrl = [[result valueForProperty:ALAssetPropertyURLs]

 objectForKey:[arrKeys objectAtIndex:0]];

            }
        }
    };

    void (^assetGroupEnumerator)(ALAssetsGroup *, BOOL *) =

 ^(ALAssetsGroup *group, BOOL *stop)
    {
        if(group != nil)
        {
            [group enumerateAssetsUsingBlock:assetEnumerator];
        }
    };
    [library enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:

assetGroupEnumerator failureBlock:^(NSError *error){
        NSLog(@"%@",error);
    }];

    [pool release];