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I have an application where a user can drag many images onto a canvas. Some views are above other views. I want to save the images transforms, frames, and z-index. Where do I find the z-index of a view (in comparison with other views on the superview) so I can persist it. And then how to I restore all subviews to their proper z-index?
The superview have an array of child, into which the child are in order from back 0 to top (number of child) and there is method to insert child at a certain index.
There is a section of method in the UIView documentation with method that look like this one: