Detecting circular touch iphone sdk

Question

i want to detect when user uses one finger to make a circular motion on a UIView

any help will be appreciated

see this link http://cocoacontrols.com/platforms/ios/controls/ndrotator — hchouhan02, Mar 12 '12 at 08:47

score 1 · Answer 1 · answered Mar 12 '12 at 08:46

1

Subclass youe UIView and implement

– touchesBegan:withEvent:
– touchesMoved:withEvent:
– touchesEnded:withEvent:
– touchesCancelled:withEvent:

In touch moved you get the new touch points and you can see if the touch points are on a circle arc.

answered Mar 12 '12 at 08:46

Alex Terente

hehe i know that :), how can i determine from the points i get that the user is moving in a circle – Monty Mar 12 '12 at 10:25

score 0 · Accepted Answer · edited May 23 '17 at 11:57

0

I know it's bad practice to answer with a bunch of links. But so is reinventing the wheel.

Take a look at:

All the linked questions include accepted answers.

edited May 23 '17 at 11:57

Community

answered Mar 12 '12 at 10:05

Rok Jarc

you should close the question for duplicate. Not copy paste some links that are on stack. – Alex Terente Mar 12 '12 at 13:20
@AlexTerente: i think sometimes a list of 80% 'duplicates' is much more informative (for OP and later for others) and useful that simply closing question as a duplicate. Each of these 'duplicates' holds a number of further references. If they ALL could be joined under one meta-question: then i'd agree – Rok Jarc Mar 12 '12 at 18:00

2 Answers2