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. Also, I get a first delegate call "loaded" from the UIWebView itself, when the content is first rendered completely -- so I take a first snapshot there, and ignore any "scrolling" events beforehand. I also limit my snapshots to N times a second (in case I receive very frequent "scrolling" events) and this further provides the efficiency I need. 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 "pose" as delegate and after taking my snapshot, call the original delegate, or only set myself as a delegate instead of the original. Any ideas? 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. > Motti Shneor, CEO, suMac LTD. Software Development for the Macintosh Home/Office Address: 34 Emek-Ha-Ella St. Appt.1 Modiin, ISRAEL, 71723 Home/Office Tel/Fax: +972-8-9267730 Home eMail: motti.shn...@gmail.com Office eMail: su...@bezeqint.net Mobile phone: +972-54-3136621 --- ceterum censeo microsoftiem delendam esse --- _______________________________________________ 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
