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2014/10/15 ¤U¤È 10:05:31
iphone Programming Glossary: contentoffset.yTracing the exact location of the longpressgesture with CGPoint http://stackoverflow.com/questions/12963004/tracing-the-exact-location-of-the-longpressgesture-with-cgpoint is triggered. You should check your scroll view's contentOffset use contentOffset.x for horizontal layouts and contentOffset.y for vertical layouts to detect which image you should save. Additionally you could convert the touch point to the UIImageView..
http://stackoverflow.com/questions/13511733/how-to-make-supplementary-view-float-in-uicollectionview-as-section-headers-do-i headerHeight CGRectGetHeight layoutAttributes.frame CGPoint origin layoutAttributes.frame.origin origin.y MIN MAX contentOffset.y cv.contentInset.top CGRectGetMinY firstObjectAttrs.frame headerHeight CGRectGetMaxY lastObjectAttrs.frame headerHeight..
Extending UIScrollView and Monitoring Scroll Events http://stackoverflow.com/questions/719392/extending-uiscrollview-and-monitoring-scroll-events
Unwanted scrolling when animating zoomScale in UIScrollView http://stackoverflow.com/questions/7301744/unwanted-scrolling-when-animating-zoomscale-in-uiscrollview bug A tap will cause zoomScale to be changed to 0.5 using animateWithDuration thus zooming out. If the UIScrollView 's contentOffset.y is less than about 2700 or greater than 5900 the zoomScale animation works fine. If the tap happens when contentOffset.y.. is less than about 2700 or greater than 5900 the zoomScale animation works fine. If the tap happens when contentOffset.y is between those two values the contentOffset.y will jump not animated to about 2700 and then the zoomScale animation will.. than 5900 the zoomScale animation works fine. If the tap happens when contentOffset.y is between those two values the contentOffset.y will jump not animated to about 2700 and then the zoomScale animation will occur but scrolling will occur at the same time..
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