iOS how index of image can be passed from collectionview to scrollview - ios

Question

I am creating a program where if I click on thumbnail in collectionview, larger image should be opened in scroll view which is in another view collector. For that purpose i am using segue. but I am doing something wrong there, how can I solve this problem,
my code of segue is,
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([[segue identifier] isEqualToString:#"showDetail"])
{
NSIndexPath *selectedIndexPath = [[self.gallerycollection indexPathsForSelectedItems] objectAtIndex:0];
// load the image, to prevent it from being cached we use 'initWithContentsOfFile'
NSString *imageNameToLoad = [NSString stringWithFormat:#"interior_%d", selectedIndexPath.row];
NSString *pathToImage = [[NSBundle mainBundle] pathForResource:imageNameToLoad ofType:#"jpg"];
UIImage *image = [[UIImage alloc] initWithContentsOfFile:pathToImage];
GalleryImageScrollViewController *gallerydetailViewController = [segue destinationViewController];
gallerydetailViewController.FullScreenImageScroller=image ;
}
}
detailViewController.m
- (void)viewDidLoad
{
[super viewDidLoad];
NSMutableArray *mutablearray = [NSMutableArray array];
data=[MyDatabase new];
slideImages=[data OpenMyDatabase:#"SELECT pic_name_big FROM interior":#"pic_name_big"];
[mutablearray addObjectsFromArray:slideImages];
temparr = [[NSMutableArray alloc]init];
temparr=[NSMutableArray arrayWithArray:mutablearray];
[self putImageViewsInScrollView:[temparr count]];
self.FullScreenImageScroller.delegate=self;
}
-(void) putImageViewsInScrollView:(int)numberOfImageViews
{
for(int i=0 ;i<numberOfImageViews; i++)
{
fullScreenImageView=[[UIImageView alloc]initWithImage:[UIImage imageNamed:[temparr objectAtIndex:i]]];
fullScreenImageView.frame = CGRectMake((WIDTH_OF_IMAGE * i) , 0, WIDTH_OF_IMAGE, HEIGHT_OF_IMAGE);
[self.FullScreenImageScroller addSubview:fullScreenImageView];
}
[self.FullScreenImageScroller setContentSize:CGSizeMake(WIDTH_OF_SCROLL_PAGE * ([temparr count]), HEIGHT_OF_IMAGE)];
[self.FullScreenImageScroller setContentOffset:CGPointMake(0, 0)];
[self.FullScreenImageScroller scrollRectToVisible:CGRectMake(WIDTH_OF_IMAGE,0,WIDTH_OF_IMAGE,HEIGHT_OF_IMAGE) animated:NO];
}
then what should I pass in scrollview controller (GalleryImageScrollViewController) to open image of specific thumbnail ?

Answer 1

Pass the image name to the detail view controller like this
-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
NSArray *indexpaths = [self.collectionView indexPathsForSelectedItems];
DetailViewController *dest = [segue destinationViewController];
dest.imageName = [recipeImages objectAtIndex:[[indexpaths objectAtIndex:0] row]];
// imageName is a property of detail view controller
}
Then in the viewDidLoad of detailViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.imageView.image = [UIImage imageNamed:self.imageName];
}
Im not using scroll view, only an imageView added as a sub view to the view

Answer 2

Its pretty simple. Just pass the index of selected thumbnail image to GalleryImageScrollViewController.(from answers given above..)
Then, In the viewDidLoad method of detailViewController populate image in imageView using the fetched index.
In the viewDidLoad of detailViewController
-(void)viewDidLoad
{
[super viewDidLoad];
self.imageView.image = [UIImage imageNamed:[[[NSBundle mainBundle] pathForResource:[NSString stringWithFormat:#"interior_%d", indexOfThatImage] ofType:#"png"]]];
}
Please note that file extension is correct in that of your bundle.