iPhone CALayer's rotation axis

I'm rotating a CALayer on the X axis开发者_运维技巧, but even if it's displaced on the Z axis, it uses the Z = 0 as axis for the rotation?

Is there a way of telling it to use the bottom of the plane, as the axis?

Thank you!

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The transform of a CALayer uses the layer's anchor as its origin. You could try adjusting the anchorPoint and anchorPointZ properties of the layer.