- V or H to specify orientation(default is horizontal).
- | , Superview.
- - , for specifying default margin, -15- to specify different margin.
- @ , to specify priority to constraint.
- Views are enclosed inside []
- Constraints may be enclosed inside ()
- To specify names pass a dictionary of type ["viewName": view] as a parameter.
- To specify names to constant values pass a dictionary of type ["constantName": value(of type NSNumber)]
- To specify constraints on the perpendicular direction to orientation use layout options parameter.