How to enlarge image to full view when used in UICollectionView?

Question

In my project, I use UICollectionViewto display images, and I also use UIImageViewin UICollectionViewCell. All I want is when I click on the image that it should expand and show in full screen. To do this, I created a new view on which UIImageViewTapGesture is on and will apply UICollectionViewCells. The expanded image opens in the next view, but is not presented in the frame that I give it. as well as when I click on any image that it removed from the collection view. please tell me how to reload UICollectionViewCells Please suggest me to place the image on the given frames. I am sharing my code

- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
    UICollectionViewCell *cell=[collectionView dequeueReusableCellWithReuseIdentifier:@"cellIdentifier" forIndexPath:indexPath];

    imgview = (UIImageView *)[cell viewWithTag:100];
    imgview = [[UIImageView alloc]initWithFrame:CGRectMake(0,0,160, 160)];

    imgview.image = [UIImage imageNamed:[imagearray objectAtIndex:indexPath.row]];
    //cell.backgroundColor=[UIColor colorWithPatternImage:[UIImage imageNamed:[imagearray objectAtIndex:indexPath.row]]];
    [cell.contentView addSubview:imgview];

    UITapGestureRecognizer *tapped = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(expandImage:)];
    tapped.numberOfTapsRequired = 1;
    [imgview setUserInteractionEnabled:YES];
    imgview.tag = indexPath.row;
    [imgview addGestureRecognizer:tapped];

    [cell.contentView addSubview:imgview];

    return cell;
}

-(void)expandImage:(UITapGestureRecognizer*)recogniser
{
    UIView *view1 = [[UIView alloc]initWithFrame:CGRectMake(0, 50, self.view.frame.size.width , self.view.frame.size.height)];
    view1.backgroundColor = [UIColor greenColor];
    [self.view addSubview:view1];

    UIButton *closeButton = [[UIButton alloc]initWithFrame:CGRectMake(310, 10, 50, 40)];
    [closeButton setTitle:@"Close" forState:UIControlStateNormal];
    [closeButton addTarget:self action:@selector(Closetab) forControlEvents:UIControlEventTouchUpInside];
    [view1 addSubview:closeButton];

    UIImageView *photoView = [[UIImageView alloc]initWithFrame:CGRectMake(0, 70, self.view.frame.size.width, self.view.frame.size.height-200)];
    [photoView setBackgroundColor:[UIColor blueColor]];
    [view1 addSubview:photoView];
    photoView.accessibilityIdentifier = @"nature2.png";

    UIImageView *photoView1 = (UIImageView*)recogniser.view;
    photoView1.accessibilityIdentifier = @"nature2.png";

    //photoView.clipsToBounds = YES;

    // photoView.accessibilityIdentifier = @"apple1.png";

    photoView1.contentMode =  UIViewContentModeScaleAspectFill;

    //photoView1.clipsToBounds = YES;
    [view1 addSubview:photoView1];  
}

Answer 1

. . .

UIView *view1 = [[UIView alloc]initWithFrame:CGRectMake(0, 50, self.view.frame.size.width , self.view.frame.size.height)];
    view1.backgroundColor = [UIColor greenColor];
    [self.view.window addSubview:view1];

Answer 2

- , , , .

.

Answer 3

, - , , , , , , . , :

    UIImageView *photoView1 = (UIImageView*)recogniser.view;
    [view1 addSubview:photoView1]; 

1. UIImageVIew . :

    imgview = (UIImageView *)[cell viewWithTag:100];
    imgview = [[UIImageView alloc]initWithFrame:CGRectMake(0,0,160, 160)];

. , . subviews cellForItemAtIndexPath, . , , . , , UIImageView. , CollectionView :

-(void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath

You can replace your expandImage method , inside which you simply get your image with imagearray . And finally, this beautiful library is ready for you, MHFacebookImageViewer .

Answer 4

Add imageviewtonavigationController.view

UIImageView *imgView =[[UIImageView alloc]initWithFrame:self.view.bounds];
[self.navigationController.view addSubview:imgView];

Answer 5

I did the above code first added a click gesture then apply the following code

-(void)expandImage:(UITapGestureRecognizer*)recogniser
{

    view1.hidden = NO;

    UIImageView *photoView1 = (UIImageView*)recogniser.view;
    photoView1.frame = CGRectMake(0, 0, self.view.frame.size.width, 510);
    photoView1.accessibilityIdentifier = @"nature2.png";

    //photoView.clipsToBounds = YES;

    // photoView.accessibilityIdentifier = @"apple1.png";

    photoView1.contentMode =  UIViewContentModeScaleAspectFill;

    photoView1.clipsToBounds = YES;

    [view1 addSubview:photoView1];
    }