iOS controls hide and gone like android

Question

I have used storyboard with autolayout for my UI design. Basically in android there are three different properties will be there like Visible, Invis

Answer 1

Neither removing the subview, nor adjusting the frame worked for me, so as an alternate solution, I programmatically added a constraint that automatically adjusts the difference.

For example: If you have 3 views, A_view B_view and C_view vertically aligned in that order and you want to "Hide" B and also adjust the difference, add a constraint

B_view.removeFromSuperView()
var constr = NSLayoutConstraint(item: C_view, 
                                attribute: NSLayoutAttribute.Top, 
                                relatedBy: NSLayoutRelation.Equal, 
                                toItem: A_view, 
                                attribute: NSLayoutAttribute.Bottom,
                                multiplier: 1,
                                constant: 20)
view.addConstraint(constr)

constant is (in this case) the amount of vertical space between C_view and A_view

It worked for me, but requires knowledge of constraints