How can I let UIScrollView (pagingEnabled) to move

Ok. here is the story:

I have a UIWebView in full screen, width = 768

It loads several images and those images are in one line, which means the UIWebView will scroll only horizontally.

Now, I set the UIScrollView inside the UIWebView to pagingEnabled = YES. So the scroll on the UIWebView will move page by page.

The problem is that every image's width is about 900. I won't scale them down and if I scroll the UIWebView, from the 2nd page on, always 132points of previous image will show. This is not good for me.

So how can I manipulate the UIWebView or the UIScrollView inside the UIWebView so that each scroll will move a page of 900 points, if the view's frame width is 768?

The constraints are:

I can't change its contentSize
I can't change its bounds or frame

I say these constraints because UIWebView will change them on its own purpose when it loads contents.

Anyone would like to join this brain storming?

Thanks

I'm thinking you're going to need to set a UIScrollView delegate that tracks touches beginning and ending. More specifically, scrollViewDidEndDragging:willDecelerate is what I'm thinking you'll need to use, as it fires the instant a user lifts their hand from the device.

First, pagingEnabled=NO seems obvious, we're going to have to control our own paging. Which, I don't feel is too tough. Track the direction of the scrolling in scrollViewDidScroll:, so that we have some global set: BOOL isGoingRight = YES or NO (NO means the last movement was to the left) float PAGESIZE = 900.0;

Here's how my scrollview delegate method would look like that handles paging.

- (void) scrollViewDidEndDragging:(UIScrollView*)_scrollView willDecelerate:(BOOL)willDecelerate {
    float offsetProportion = _scrollView.contentOffset.x/_scrollView.frame.size.width;
    //depending upon our direction, round up or down
    int page = isGoingRight? ceilf(offsetProportion): floorf(offsetProportion);
    //manually finish the scroll
    [_scrollView scrollRectToVisible:CGRectMake(page*PAGESIZE, 0, _scrollView.frame.size.width, _scrollView.frame.size.height) animated:YES];
}

I didn't test this, you may or may not need to disable touches at points.