On Feb 8, 2011, at 8:15 AM, Roland King wrote: > I can't see why UIScrollView would call layoutSubviews every time it scrolls, > I expected that it would call layoutSubviews once only when its geometry > changes (or you ask it to) and after that would just scroll its contained > view quietly.
Technically scrolling is a geometry change, since it is accomplished by changing the layer's bounds.origin (basically the change is coming from Core Animation). If your layout is expensive, it is likely that you will need to maintain a separate "layout is dirty" flag to avoid this. -- David Duncan _______________________________________________ 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
