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Question by xinyunzhong · Feb 21, 2020 at 03:58 AM · uiscrollviewscrollingscroll view

How to check if child item is visible in ScrollView?

I have a scroll view and have child elements in it (Imagine it's the GMAIL phone app). How can I check if one child element is visible or not while scrolling in the list? I tried OnBecameVisible and OnBecameInvisible but it seems that they are not even being called.

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avatar image kskjadav007 · Feb 21, 2020 at 10:26 AM 0
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Get screen top endpoint position of y screen down endpoint position of y

chack if your object position of y is between these points.

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Answer by xinyunzhong · May 16, 2020 at 12:27 AM

My intention was to improve the performance on older phones. However I found that the bottle neck is not the viewing/rendering but I hav enabled pixel perfect. As sonn as I removed pixel perfect the performance is up again.

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