What is translatesAutoresizingMaskIntoConstraints?

translatesAutoresizingMaskIntoConstraints. A Boolean value that determines whether the view’s autoresizing mask is translated into Auto Layout constraints .

Overview. Stack views let you leverage the power of Auto Layout, creating user interfaces that can dynamically adapt to the device’s orientation, screen size, and any changes in the available space . The stack view manages the layout of all the views in its arrangedSubviews property.

Best use of stack view is that if you want to set multiple controls allinged vertically or horizontally to each other you just add all of them in stack view. stackview will handle its allignment you just need to give frame contraints to stackView.