OK!!!! Thanks Marco. Thad did the trick!!! As I was suspecting, my "Mac" mind was hiding the solution from me. I didn't guess that the UIWebView had its own internal UIScrollView to support all the navigation gestures (scroll, zoom, rotate, translate etc.)
On the Mac, usually a view is usually just a view, and if you want to scroll it, you'd need to embed it into a scroll-view yourself, and manage the interaction. I tried it now , and it works perfect for my needs. In addition, I get a first delegate call when the content is "loaded" from the UIWebView itself. This signifies for me the first time the document is already rendered, and where I take my first snapshot. I ignore all the scrollView delegate calls prior to this call. I also limit my snapshots to N times a second (in case I receive too frequent "scrolling" events) and this further optimize my capturing scheme. I seem to have a loose end though -- when I examine the UIWebView's scrollView property, it initially has a non-nil delegate. I don't know if I should "interpose" as delegate and after taking my snapshot, call the original delegate, or only set myself as a delegate instead of the original. I'm afraid that "posing" as the delegate but still maintaining the original delegate, may imply that I need to implement the WHOLE delegate protocol, just to pass on all delegate calls to the original delegate. Any ideas? Motti Shneor, Mac OS X Software Architect & Team Leader Spectrum Reflections Ltd. On 22 באפר 2013, at 16:08, Marco Tabini wrote: > > On 2013-04-22, at 9:04 AM, Motti Shneor <su...@bezeqint.net> wrote: > >> To be very precise --- I'd like to know how to be notified about ANY UIView >> visual change. It somehow seems very obvious to me that such "delegate call" >> must exist. Maybe I'm overlooking something very basic here. > > I think I had completely misunderstood what you wanted to do! I think what > you want to do is interpose yourself as the delegate of the UIWebView's > UIScrollView instance (accessible through the -scrollview property); that > lets you track changes in scroll position, zoom level, etc. Is that what you > meant? > > > —Mt. > _______________________________________________ Cocoa-dev mailing list (Cocoa-dev@lists.apple.com) Please do not post admin requests or moderator comments to the list. Contact the moderators at cocoa-dev-admins(at)lists.apple.com Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
