iOS scroller performance

J. Landman Gay jacque at hyperactivesw.com
Mon Mar 25 00:48:16 EDT 2013


On 3/24/13 11:36 PM, Monte Goulding wrote:

> Wait... so you can only set the scroll of a group that is directly on
> the card then? That makes it quite difficult to use...

I think it can be anywhere, not just the card. The trick is, the 
layermode must be set on the topmost object; if it's a group, then set 
it on the group itself, not the contents of the group.

>
> Where did you learn that the scrolling group can't be inside another
> group? I've just confirmed it using the effective layermode but I
> can't see it documented...

I'm not sure where it is now, but it was mentioned in the release notes.

>
> I think this means for scrolling fields in a custom control you need
> to set their height to the formatted height and then just scroll the
> group.

I'm not sure how it would work in that case. If you have more than one 
scroller in the group it could get tricky, and I think you're right 
that's where the jerkiness comes in. My fields haven't been in groups, 
so that's why I didn't see it.

The dictionary has a good explanation of how layermode works, maybe that 
will help you figure out what to do. It doesn't specifically address the 
kind of grouping you need to do though.

-- 
Jacqueline Landman Gay         |     jacque at hyperactivesw.com
HyperActive Software           |     http://www.hyperactivesw.com




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