iphone image manipulation

for iphone app containing group of images on view best way doing image manipulation includes dragging, scaling,
rotating image. think subclassing uiimageview , overriding touchesbegan/moved/ended events in dragging/scaling/
but know should 1 use quartz in order draw scaled image when user resize? idea? want create scaled image
once user scaling multiple taps without distortion size. tutorial/sample code helpful in regard

thanks
arnieterm

 

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