values for Z Position in Layers
values for Z Position in Layers
- Subject: values for Z Position in Layers
- From: Steve Sheets <email@hidden>
- Date: Sun, 28 Oct 2007 00:39:12 -0400
Good evening all...
I have a couple quick questions regarding the Z value of a Layer,
that the documentation does not explain.
What should the Z Position property of CALayers be set to?
The property is a float value, but the documentation does not explain
the intended ranged. Often properties that are float are meant to be
of the range 0.0 to 1.0. Is this the case for Z?
If not, is there any suggested range for this value? For example,
even though it is a float, is it more efficient to set the property
to integers (ex. 1.0, 2.0, 10.0)?
Lastly, does changing a Z value for a layer change the layer depth
position in regards to sibling layers or does it change the depth in
relationship to all layers on the view/window? For example, if
sibling layers A & B have values 1.0 & 2.0, then B layer is stacked
on top of the A layer. If Layer A has sublayer C, can C's Z value be
changed so that it appears on top of B?
While i have had some success programming Core Animation, and the new
CALayer objects, I do have some questions that I will be asking here
and on other locations. If anyone wants to talk about Layer
animation, please feel free to contact me directly. I will shortly
have some Demo Apps and source code examples, that I will be willing
to release.
Thanks,
Steve Sheets
Midnight Mage Software
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