> On Mar 21, 2018, at 6:36 AM, Markus Spoettl <ms_li...@shiftoption.com> wrote: > > On 3/21/18 14:26, Markus Spoettl wrote: >> It seems the old rule that layer-hosting views must not have sub-views is no >> longer >> valid. I remember in the old days you couldn't have layer-hosting NSViews >> that have >> sub-views. I can't find the portion in the documentation that explicitly >> forbids it >> (I'm sure it was there). >> Can that be right? > > As usual shortly after sending the message I finally find something. In the > docs for -wantsLayer it says: > > ... Similarly, do not add subviews to a layer-hosting view. ... > > BUT I also found a statement on stackoverflow by Corbin Dunn saying that it > is OK > > https://stackoverflow.com/questions/10719368/are-layer-hosting-nsviews-allowed-to-have-subviews?rq=1 > > So it seems OK since 10.8 Mountain Lion. Or not.
Hi Markus, There's really no official distinction these days between a layer-hosting view and a regular view. A view may have a layer (provided by directly calling -setLayer:), or AppKit may (or may not, depending on the exact circumstances) give it a layer automatically. Either way, the view is subject to the same rules about what properties of that layer it may mutate (vs. those AppKit "owns")—see <https://developer.apple.com/library/content/releasenotes/AppKit/RN-AppKit/#10_13Layer-backed%20Views <https://developer.apple.com/library/content/releasenotes/AppKit/RN-AppKit/#10_13Layer-backed Views>>. And either way, the view may certainly have subviews. We'll update the incorrect documentation—thanks for pointing that out. Hope that helps, Matt _______________________________________________ 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
