Strategy - Drawing a 'correct tick/check mark' to perform an action

Question

I am looking for a strategy or guidance to get the functionality. I have a an app that does simple math. A math sum such as "4+4 = 8" appears, and if the user agrees they draw a "tick" or "correction mark" (similar to the Nike tick) or if they dont agree they draw an "X".

I know how to draw however what is the technique to detect if either the tick or the X has been drawn? Or simpler, just detect if the "tick" is indeed a tick.

It is just guidance and/or direction to find a solution that will recognise these using UIGestureRecognizer.

http://www.raywenderlich.com/6567/uigesturerecognizer-tutorial-in-ios-5-pinches-pans-and-more This shows how to create custom gestures with UIGesturerecognizer — Putz1103, Mar 05 '14 at 15:43

score 0 · Accepted Answer · edited May 23 '17 at 12:10

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Custom gestures are possible using UIGestureRecognizer. I'm not sure how to do it as I never have before. But here is a good tutorial on the different options available.

Tutorial

Also this answer.

And this answer.

edited May 23 '17 at 12:10

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answered Mar 05 '14 at 15:50

Putz1103

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Strategy - Drawing a 'correct tick/check mark' to perform an action

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