iOS: Drawing a Rectangle on an ImageView and Adjusting Borders

Question

Attached 1 is a screenshot from an app called GeniusScan where you can photograph any document and an adjustable rectangular grid shows on the imageview. You can easily adju

Answer 1

Dude:

I created a demo that solves both questions:

1- How can I draw and interact with the grid on the imageview?

By Adding 4 views that will act as interactive control points by adding UIPanGestureRecognizer and then drawing the grid using CAShapeLayer on top of your view.

2- How can I return the corner points of the grid to my view controller.

You must keep references to the four control points of your grid.

Here's the link to my code.