Question

I have a UIScrollView, created programmatically, inside of a UIView. What do I need to do to ensure that I can use the delegate method scrollViewDidEndDecelerating?

Here’s what I have set up, please assume that within the UIScrollView, that there are three UIImageViews. When the page first loads, I am looking at the center UIImageView and I can scroll once backwards or once forwards. The reason why I need this delegate method is because I intend to use it to calculate which UIImageView I am currently looking at.

ViewController.h

@interface ViewController : UIViewController <UIScrollViewDelegate>

ViewController.m

UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds];
scrollView.pagingEnabled = YES;
[self.view addSubview: scrollView];

- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView
{
    NSLog(@"scrollViewDidEndDecelerating");
}

Answer 1

Add

 scrollView.delegate = self

after the scroll view initialization.