How to make a triangle on top of the UIView

Question

How can a make a triangle on top of the UIView as a anchor to a UIButton , like in the picture below? I want the triangle to change the position when the other Button is selected. Please only answers written in swift. :)

Answer 1

Your screen shot displays a popover . Use a UIPopoverController and you'll get the triangle automatically.

Answer 2

Sometimes solutions are simpler then expected. Just draw all three triangles in storyboard. Then in your UIController you use the hidden flag to show or hide the triangle.