xamarin/Xamarin.Forms
[Bug] iOS CollectionView's Scrolled event can not be fired when scrolling in HeaderTemplate
オープン
#8,548 opened on 2019/11/18
a/collectionviewe/2 :clock2:good first issuehelp wantedinactivep/iOS 🍎t/bug :bug:up-for-grabs
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説明
Description
I use scrolled event of collection view for detecting scroll offset, then hide the StackLayout when scrolling up for more space at bottom. But when I create a HeaderTemplate which has HeightRequest bigger than current screen's height, the Scrolled event can not be fired, so I can not scroll down for showing the hidden layout. The ItemsViewScrolledEventArgs.VerticalOffset can not be back to zero. Take a look at before and after screenshot
Basic Information
- Version with issue: Xamarin.Forms 4.3.0.947036
- iOS: 13.2
- Nuget Packages:
Screenshots
Before scrolling up
After, can not scroll down to view the top layout
Reproduction link
https://drive.google.com/file/d/1Ug5Hzr2tw947UyDU6SZjqUOdTcMqdFrs/view?usp=sharing