I have a UIVIewController- VC_1. I have two subViews SubV_1 and SubV_2.
Frame of SubV_1 is (0,0,375,144).
I want to place SubV_2 at position (0,144,300,375), just below SubV_1.
I need to add 'Auto Layout' constraints such that when SubV_1 is resized (decrease of height), then SubV_2 is moved up automatically.
How do I do this using constraints programmatically?
 
    