On iOS I have a UIScrollView subclass. During a zoom gesture I need to distinguish zoom-out from zoom-in. What is the best way to do this?
Thanks,
Doug
On iOS I have a UIScrollView subclass. During a zoom gesture I need to
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On iOS I have a UIScrollView subclass. During a zoom gesture I need to distinguish zoom-out from zoom-in. What is the best way to do this?
Thanks,
Doug
In
UIScrollViewDelegate‘sscrollViewWillBeginZooming:withView:, store the currentzoomScaleof yourUIScrollView; compare the stored value to thezoomScalein thescrollViewDidEndZooming:withView:atScale:to determine if it was a zoom in or a zoom out. If the value has increased, it was a zoom in; otherwise, it was a zoom out.