How to dismiss UIImageView when view is pressed in UICollectionView - ios

Question

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
UICollectionViewFlowLayout *myLayout=[[UICollectionViewFlowLayout alloc]init];
myLayout.scrollDirection=UICollectionViewScrollDirectionHorizontal;
[self.collectionView setCollectionViewLayout:myLayout animated:YES];
UIImageView *recipeImageView=[[UIImageView alloc]initWithFrame:CGRectMake(35, 100, 250, 250)];
recipeImageView.layer.borderColor = [UIColor redColor].CGColor;
recipeImageView.layer.borderWidth = 8.0;
[self.view addSubview:recipeImageView];
NSString *selectedRecipeImageFileName = [self.getName objectAtIndex:indexPath.row];
UIImage *selectedRecipeImage = [UIImage imageNamed:selectedRecipeImageFileName];
recipeImageView.image = selectedRecipeImage;
}
I'm using a collection view. First, I press on any image, then it will show a UIImageView on the view. If I press on another image, then again that image will appear. At this point it works properly. After that, I want to have it so if I press on a blank space then the image view hides. Please give me some ideas.

Answer 1

Add this to your tap gesture:
[recipeImageView removeFromSuperview];
But your image view must be accessible to any function. So you can just make a function and then call it whenever you want.
UPDATE
Sorry for delayed response. Try this:
in your .h file:
first in #interface... add <UIGestureRecognizerDelegate>
and after #interface:
#property UIImageView *recipeImageView;
in your .m files viewDidLoad:
UIGestureRecognizer *taps = [[UITapGestureRecognizer alloc]initWithTarget:self action:#selector(removeImageView)];
taps.cancelsTouchesInView = NO;
taps.delegate = self;
[self.view addGestureRecognizer:taps];
and somewhere in your .m file:
-(void)removeImageView
{
[_recipeImageView removeFromSuperview];
}

Answer 2

Keep a pointer to that UIImageView and call removeFromSuperview on it.

Answer 3

Use the tap gesture on your main view to remove the UIImageView from superView.
//inside viewDidLoad initilise tap gesture
tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:#selector(removeImageView:)];
tapRecognizer.numberOfTapsRequired = 1;
- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath{
UICollectionViewFlowLayout *myLayout=[[UICollectionViewFlowLayout alloc]init];
myLayout.scrollDirection=UICollectionViewScrollDirectionHorizontal;
[self.collectionView setCollectionViewLayout:myLayout animated:YES];
UIImageView *recipeImageView=[[UIImageView alloc]initWithFrame:CGRectMake(35, 100, 250, 250)];
recipeImageView.layer.borderColor = [UIColor redColor].CGColor;
recipeImageView.layer.borderWidth = 8.0;
// tap gesture was initialised globally.
[self.view addGestureRecognizer:tapGesture];
[self.view addSubview:recipeImageView];
NSString *selectedRecipeImageFileName = [self.getName objectAtIndex:indexPath.row];
UIImage *selectedRecipeImage = [UIImage imageNamed:selectedRecipeImageFileName];
recipeImageView.image = selectedRecipeImage;
}
Now inside the removeImageView:
- (void)removeImageView:(UITapGestureRecognizer*)sender {
UIView *view = sender.view;
//Now here check the views on which user is taping and match if user is taping on desired view where you want remove the images from superView. and also remove the tap gesture from view.
}