Question

i have a scroll view with multiple images and i am using this code. i have the images with dimensions (2121 x 2892) in Portrait and (2112 x 1500) in landscape mode

scrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];
scrollView.pagingEnabled = YES;
scrollView.delegate = self;
scrollView.showsVerticalScrollIndicator = NO;
scrollView.showsHorizontalScrollIndicator = NO;

scrollView.maximumZoomScale = 3.0f;
scrollView.minimumZoomScale = 1.0;

NSInteger numberOfViews = [arrayImages count];

for (int i = 0; i < numberOfViews; i++)
{
    CGFloat yOrigin = i * scrollView.frame.size.width;
    imageView = [[UIImageView alloc]initWithFrame:CGRectMake(yOrigin  +30, 0, self.view.frame.size.width-60 , self.view.frame.size.height)];

    imageView.userInteractionEnabled = YES;
    imageView.image = [UIImage imageNamed:[arrayImages objectAtIndex:i]];
    [scrollView addSubview:imageView];
    imageView.userInteractionEnabled = YES;

}
[self.view addSubview:scrollView];

i want to implement the zoomin and zoom out functionality on double tab and moving with two fingers. I saw many sample application but i am not be able to do the same. if anybody have its own code please share with me.

Answer 1

I want to implement the zoomin and zoom out functionality on double tab and moving with two fingers.

For the zoom in on double tap, check out the gesture recogniser part of this tutorial.

As for moving around with 2 fingers, you could use a UIPanGestureRecogniser for 2 touches and change the contentOffset of the scroll view accordingly when a pan is recognised.