Question

I’ve implemented a paged scroll according to this technique
( iOS develop. How to extend UIScrollView's scroll event responding area? ) and it works just as intended.

The view that I’m scrolling is containing a couple of buttons and I want to be able to click not only those that are centered/paged into the scrollview but also those to the left and to the right of it. I cannot find any way to solve this but I’m not really an iOS-Jedi yet, hoping one of you are though 🙂

So as you can see from the screenie the UIScrollView is about a third of the width of the window, the contentsize of the UIScrollView is much larger: about 1500px and contains a lot of buttons added programmatically. The cool thing with this solution, and the part that actually works, is that the buttons:
1) are paged into the scrollview
2) are visible outside the scrollview (since “clip subviews” is unchecked for the scrollview) 3) the buttons are clickable when visible inside the uiscrollview.

BUT what doesn’t work is simply this:
– the buttons currently being outside of the window does not receive “their” clicks when clicking on them, the events are instead forwarded to the underlaying (the white part of the window) view.

Answer 1

So,

I finally managed to solve this puzzle and the solution is divided into two
parts. The problem was, as you way recall, that the click events did not travel to the
buttons that were(visible) outside the UIScrollView. It turned out that the clicks were captured by the underlying view and that it is possible to manipulate their way to finding their target by bending the rules a bit regarding who got hit and thereby tricking the events to get passed where you want them. Not really sure if this is how it should be done but it solved my problem.. . 🙂

1) First one must override the following method in the bottom view
so that it returns the scrollview instead of itself when appropriate.

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event 
{
    UIView *view = [super hitTest:point withEvent:event];

    if (view == self) 
        return [self scrollView];

    return view;
}

2) The scrollView must override TWO methods to hand over the clicks to its contained objects.

    - (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event 
    {
       UIView *view = [super hitTest:point withEvent:event];
       // Always return us.
       return view ;    
     }

and

- (BOOL)pointInside:(CGPoint)point withEvent:(UIEvent *)event
{
    // We want EVERYTHING!
    return YES;
}

Thanks a lot for you comments and willingness to help.
I ho