rotate uiview using touch (ipad and iphone) -

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i trying design app , struggling think of best way it. i'm after advice please!

if imaging bicycle wheel in middle of ipad (and iphone)... want user able click on tyre , spin left or right. depending on speed of swish drive speed of wheel rotation.

it should rotate around centre of wheel , not move other direction.

do need use graphics code, or listen touch, check area touched, rotate image around it's centre left or right?

really i'm after pointers around methods use - i'm not being lazy , asking code, if knows of tutorials - immensely!!

thanks info.

your best bet use 1 of uigesturerecognizer subclasses, uipangesturerecognizer includes velocity.

apple's simplegesturerecognizers project started.


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