BoundsAndCenter.swift

func boundsAndCenter() {
        // Do any additional setup after loading the view.
        let v1 = UIView(frame: CGRect(x: 110, y: 110, width: 130, height: 200))
        v1.backgroundColor = .green
        
        let v2 = UIView(frame: v1.bounds.insetBy(dx: 10, dy: 10))
        v2.backgroundColor = .red
        
        view.addSubview(v1)
        v1.addSubview(v2)
        
        //        v2.bounds.size.height += 20
        //        v2.bounds.size.width += 20
        
        print(view.frame)
        print(v1.frame)
        print(v2.frame)
        print(v2.bounds)
        //        v1.bounds.origin.x += 10
    }