ios - Automatically set UIView vertical size based on device vertical size (including Auto Layout changes) -

i've been googling on , can't seem pinpoint answer question have.

i'm writing app , vertical space of child uiview maintain height of device or rotation of parent device regardless of orientation , without hardcoding values ahead of time.

the structure of layout is:

viewcontainer   uiview     uiscrollview       uiview (content view) 

specifically, have vertical space of content view set native height of device/orientation running on, , when device rotates, vertical space change new vertical height. uiscrollview used pan horizontally only.

i using quartz draw in view. set initial height via intrinsiccontentsize? if how query parent view?

i've tried using self.superview within content view doesn't work. how detect change has occurred, , after occurs, how new y resolution , apply it? not want disable auto layout if don't have to.

here visual of want if haven't made clear: https://www.evernote.com/l/aai3vfkkbarplypsourjowamiigielf5p-w

i have app same view hierarchy.

what want achievable pure autolayout, following constraints. vertical constraints included here:

view.addconstraints(nslayoutconstraint.constraintswithvisualformat("v:|[scrollview]|", options: .allzeros, metrics: nil, views: ["scrollview" : scrollview]))  scrollview.addconstraint(nslayoutconstraint(item: contentview, attribute: .height, relatedby: .equal, toitem: scrollview, attribute: .height, multiplier: 1.0, constant: 0.0)) scrollview.addconstraints(nslayoutconstraint.constraintswithvisualformat("v:|[contentview]|", options: .allzeros, metrics: nil, views: ["contentview" : contentview])) 

since height of contentview correct, not sure whether still want notified of orientation changes.