Bug 56298 - Changing ListViews HasUnevenRows at runtime on iOS has no effect
Summary: Changing ListViews HasUnevenRows at runtime on iOS has no effect
Alias: None
Product: Forms
Classification: Xamarin
Component: iOS ()
Version: 2.3.5
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Bugzilla
Depends on:
Reported: 2017-05-12 15:50 UTC by thomas
Modified: 2018-03-20 17:19 UTC (History)
4 users (show)

Tags: ac fr
Is this bug a regression?: ---
Last known good build:

Repro56298 (283.04 KB, application/x-zip-compressed)
2017-06-20 15:09 UTC, Rui Marinho

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Description thomas 2017-05-12 15:50:41 UTC
In our App we have a ListView that has to be able to Display either only one type of items where we need best scrolling performance so we set HasUnevenRows = false and set a fixed row height. Or two different ViewTypes with different row heights so we set HasUnevenRows = true in this case.

This works great on Android but on iOS setting HasUnevenRows = true after it was set "false" before has no effect at all which means all Rows are drawn with the same row height which looks pretty ugly in case of single row strings that are drawn with big gaps in between.
Comment 1 Rui Marinho 2017-05-15 16:12:59 UTC
Thank you for taking the time to submit the bug. We tried to reproduce the issue you reported but were unable given the description. If you could please attach a reproduction to the bug by starting with a clean Xamarin.Forms project and adding just the code necessary to demonstrate the issue, we would very much appreciate it.  
For your convenience, we have created some reproduction best practices viewable here: https://gist.github.com/jassmith/92405c300e54a01dcc6d
Comment 2 thomas 2017-05-16 09:25:51 UTC
Did you try to switch the setting back and forth between Fixed Rows and Uneven? At least in my App it doesn't. It work on Android but not on iOS
Comment 3 Rui Marinho 2017-06-20 15:09:12 UTC
Thanks i m able to reproduce
Comment 4 Rui Marinho 2017-06-20 15:09:50 UTC
Created attachment 23008 [details]
Comment 5 thomas 2017-06-26 09:54:26 UTC
Ah, great, so I don't need to create a repro project anymore.
Sorry, I was offline for some time
Comment 6 Samantha Houts [MSFT] 2018-03-20 17:19:25 UTC