UIScrollView scaling etc

Discussion in 'iOS Programming' started by beardedpig, Jan 13, 2009.

  1. beardedpig macrumors member

    Dec 17, 2008
    This problem comes in two parts but as they both related to the same thing I have put them in the same thread.

    First off is there a a way to track or find out when scrolling an image in and out by what ratio the scaling is?

    For instance if the user starts off with an image 1000 * 800 and they pinch it to make it smaller thus seeing more of the image is they a way to see by what ratio the scaling is?

    secondly, related to the above, say on this image of 1000 * 800 there is a hotspot the user can tap to trigger an action. at full size the x,x origin of this hotspot will be different if the image is scaled down by a user pinching it.

    So I suspect I need a method to determine / track the scale ratio so I can then locate the hotspot.

    Could someone continue to teach me to fish please?


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