y位置的UITableView内容偏移量始终返回0

Question

In scrollview delegate method table content offset while scrolling always return 0 for it's y position.

func scrollViewDidScroll(_ scrollView: UIScrollView) {

   print(items:String(format:"Offset %d",scrollView.contentOffset.y))

}

I have also printed the myTableView.contentOffset.y But it also prints the same result.

Answer 1

ContentOffset doesn't change when you scrolling. It's origin of your content in scrollView. It defines the point in the content view that is visible at the top left of the scroll view bounds. We can use this property to scroll programmatically .

There is more about it

https://developer.apple.com/documentation/uikit/uiscrollview/1619404-contentoffset https://www.objc.io/issues/3-views/scroll-view/

Try to track contenView.bounds.origin.y for tracking y-position