Swift CoreAnimation: zPosition should be within (-FLT_MAX, FLT_MAX) range

Question

I want to keep a view always at the front. In Swift CGFLOAT_MAX and FLT_MAX are replaced with corresponding .greatestFiniteMagnitude. So, I used:

view.layer.zPosition = .greatestFiniteMagnitude

It works fine, but now I get a warning:

CoreAnimation: zPosition should be within (-FLT_MAX, FLT_MAX) range.

Is there a way to get rid of the warning (maybe a better value to use here)?

Thanks.

Answer 1

On a 64-bit platform

CGFloat.greatestFiniteMagnitude = Double.greatestFiniteMagnitude = 1.79769313486232e+308
Float.greatestFiniteMagnitude = 3.40282e+38

Apparently the zPosition should be in the (smaller) range of a Float:

view.layer.zPosition = CGFloat(Float.greatestFiniteMagnitude)