How to create a circular knob when user swipes it should rotate that much.
It should rotate on touch.
Its like a radio tuner.
what should be the right approach doing this?
Can any body please guide on the right path.
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if its a full circular disk it easy to rotate CGAffineTransformMakeRotation(angleRadians), but this is arc only what could be the approach I am still thinking.Any help ? – ashish Jan 19 '12 at 12:46
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Did you get any of the kind? If yes, please give me too. – Chanchal Raj Mar 24 '15 at 17:03
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It seems like the easiest way to accomplish this would be to use the UISlider. No?
See: Change iPhone UISlider bar image or Customizing UISlider look
Otherwise you could do an image animation on the button, as in this example: http://iosdevelopertips.com/graphics/animated-gif-animated-images-iphone-style.html
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thanks Dan but that would not give a real look and feel to this component – ashish Jan 31 '12 at 13:41