All geek questions in one place

Scaling in UIScrollView with paging support and multiple images

I have a UIScrollviewc UIImageViewinside where I look at an image on another.

I used the Apple TapToZoom sample code to implement scaling, but whenever I zoom in, the scrolling starts from the beginning, not from the active image.

Here is a snippet of my code:

Initialize and fill out the image:

table = [[NSMutableArray alloc] initWithCapacity:7];
for(int count = 1; count <= 7; count++)
{
    NSString *fileName = [NSString stringWithFormat:@"image%d.jpg", count];
    UIImage  *image    = [UIImage imageNamed:fileName];
    [table addObject:image];
    if (image == nil) {
        break;
    }
    imageView = [[UIImageView alloc] initWithImage:image];
    imageView.userInteractionEnabled = YES;
    imageView.multipleTouchEnabled = YES;

Implement highlight gesture:

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleTap:)];
    UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleDoubleTap:)];

The method handleDoubleTapapproaches the center imageViewand brings a scroll to the top of the swap page.

I searched a lot about this, but could not find a way to increase the actual displayed image.

Thanks in advance:)

+3
source share

Source: https://habr.com/ru/post/1785632/

More articles:


All Articles