How to show multiple images inside UIScrollView in iOS

Question

I am making one iPhone app in which i need to show some images inside UIScrollView, on left and right there will be two buttons user can click on button and it will show the next or previous image. Also at the bottom there is one button, when user will click on that button it will show the image which we have selected in scrollview.I would like to know how do we show multiple images inside that scrollview and while selecting bottom button, how to find which image was there inside scrollview.

Answer 1

An example from danielbeard.wordpress.com

In case your image names aren't just numbers:

    UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height)];

    [scrollView setPagingEnabled:YES];
    [scrollView setAlwaysBounceVertical:NO];

    NSArray *imagesArray = [NSArray arrayWithObjects:@"img1.png", @"img2.png", @"img3.png", nil];

    for (int i = 0; i < [imagesArray count]; i++)
    {
        CGFloat xOrigin = i * scrollView.frame.size.width;

        UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(xOrigin, 0, scrollView.frame.size.width, scrollView.frame.size.height)];
        [imageView setImage:[UIImage imageNamed:[imagesArray objectAtIndex:i]]];
        [imageView setContentMode:UIViewContentModeScaleAspectFit];

        [scrollView addSubview:imageView];
    }

    [scrollView setContentSize:CGSizeMake(scrollView.frame.size.width * [imagesArray count], scrollView.frame.size.height)];

Answer 2

have look on to this example: http://danielbeard.wordpress.com/2012/09/17/adding-a-uiscrollview-to-a-uiview-ios/

Answer 3

Apple.developer PhotoScroller demonstrates the use of embedded UIScrollViews and CATiledLayer to create a rich user experience for displaying and paginating photos that can be individually panned and zoomed.

CATiledLayer is used to increase the performance of paging, panning, and zooming with high-resolution images or large sets of photos.