On Jun 18, 2011, at 6:50 PM, Brian Bruinewoud wrote: > Actually, that didn't work for me but it did lead me to find a solution.
Cool! > > In my case, the scroll view's contentSize wasn't being updated correctly. > To fix it I wrote the following (translated to your names) in layoutSubviews: > > sv.contentSize = v.bounds.size; Hmm. Not sure why that should be necessary. The contentSize should not *need* any updating; you should set it once at the outset, and then when you zoom, the zoomable view is transformed and everything just follows as a matter of course. The scroll view compensates in accordance with the transform, automatically. I don't quite get why you're needing to do this. > > As to why its not being update correctly, I don't know. But this did fix two > other issues I was having (and, assuming the issue is in your code too) you > should be having- namely, when I zoomed big, the scroll view sometimes > wouldn't let me scroll to the portions of the content that were off screen. > Could you check in your code to see if its the same issue Well, no, clearly not. If you download and run the project I pointed you to, you'll see there's no problem about scrolling to the offscreen portions of the image when it's zoomed large. m. > > On 19/06/2011, at 02:05 , Matt Neuburg wrote: > >> On Sun, 12 Jun 2011 14:30:42 +1000, Brian Bruinewoud <br...@darknova.com> >> said: >>> Hi All, >>> >>> I have an app that consists of a scroll view subclass which contains a >>> single subview. In the scroll view subclass I override layoutSubviews based >>> on Apple sample code (see below). The intention of layoutSubviews is to >>> centre the subview in the scrollview when the subview is smaller than the >>> scrollview's display area. >>> >>> There are three circumstances where the layoutSubviews is called but in one >>> of them the visual results are incorrect. >> >> Funny you should mention this, since I was just experimenting with the same >> issue. What I ended up doing is setting the contentOffset explicitly after >> the zoomScale changes. >> >> https://github.com/mattneub/Programming-iOS-4-Book-Examples/tree/master/p492zoomCentered >> >> m. -- matt neuburg, phd = m...@tidbits.com, http://www.apeth.net/matt/ pantes anthropoi tou eidenai oregontai phusei Among the 2007 MacTech Top 25, http://tinyurl.com/2rh4pf Programming iOS 4! http://www.apeth.net/matt/default.html#iosbook RubyFrontier! http://www.apeth.com/RubyFrontierDocs/default.html TidBITS, Mac news and reviews since 1990, http://www.tidbits.com _______________________________________________ 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: http://lists.apple.com/mailman/options/cocoa-dev/archive%40mail-archive.com This email sent to arch...@mail-archive.com
