ios - Update UIView size based on parent size using autolayout -
i have view pview
, subview sview
added setting height , width constraints programmatically.
now, @ point of time want update sview
's constraints based on pview
's width. there no direct relation between two. need perform calculation using pview
's size , set sview
's width , height constraints result.
and need set constraints in updateconstraints
method of pview
. accessed pview
's size in updateconstraints
method comes old value because updateconstraints
executed bottom-up.
any hints how can done?
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