Bug 23597 - Xamarin.Forms.StackLayout (iOS): Scrollbar at edge of screen occluded by opaque Content
Summary: Xamarin.Forms.StackLayout (iOS): Scrollbar at edge of screen occluded by opaq...
Status: RESOLVED NORESPONSE
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 1.2.3
Hardware: PC Mac OS
: Normal normal
Target Milestone: ---
Assignee: Bugzilla
URL:
Depends on:
Blocks:
 
Reported: 2014-10-03 15:27 UTC by Ian Leatherbury
Modified: 2016-03-18 08:18 UTC (History)
5 users (show)

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

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Status:
RESOLVED NORESPONSE

Description Ian Leatherbury 2014-10-03 15:27:51 UTC
Description:
Xamarin.Forms.StackLayout (iOS): Scrollbar at edge of screen occluded by opaque Content
Views with BackgroundColor set in code draw in FRONT of (occluding) the ScrollView's scrollbar. (looks very bad).

Expected Result:
The Content of the scrollbar should appear below the ScrollView's scrollbar, even if it has a non-transparent background color

Steps to reprocuce:
Have a XAML ContentPage with a scrollview ,for example below hierarchy.

<Content>
    <ScrollView>
         <Stacklayout>
            <otherstuff including rows of data made up of absolute layouts/>
        </Stacklayout>
     <ScrollView>
</Content>

In "otherstuff", set the BackgroundColor to a non-opaque color IN CODE.
Views with BackgroundColor set in code draw in FRONT of (occluding) the ScrollView's scrollbar. (looks very bad).
Comment 1 Stuart Fischer 2014-10-03 15:53:17 UTC
Issue does not occur on Android platform.
Comment 2 Rajneesh Kumar 2014-10-06 09:28:55 UTC
I have checked this issue and not able to reproduce this. I try to reproduce this issue with instruction and steps provided in bug description.

Steps I have followed:

1. Create a xamarin forms (Portable) application in XS
2. Add an xaml page named "MyPage" to it
3. Add following code to "MyPage.xaml" page:
<StackLayout Orientation="Vertical" VerticalOptions="FillAndExpand">
        <Button  Text="Welcome" />
        <ScrollView Orientation="Vertical" VerticalOptions="FillAndExpand">
            <StackLayout Orientation="Vertical" VerticalOptions="FillAndExpand">
            <AbsoluteLayout><Label Text="Hello" BackgroundColor="#A45252" /></AbsoluteLayout>
              <AbsoluteLayout><Label Text="Hello" BackgroundColor="#A45252"/></AbsoluteLayout>
               <AbsoluteLayout><Label Text="Hello" BackgroundColor="#A45252"/></AbsoluteLayout>
              <AbsoluteLayout><Label Text="Hello" BackgroundColor="#A45252"/></AbsoluteLayout>
            </StackLayout>
        </ScrollView>
      </StackLayout>
4. Call "MYPage" in App.cs and deploy the application on simulator
5. Observed that it run successfully with label background color given by code

Please let me know that what steps/code I am missing to reproduce this issue ? Could you please provide provide me steps to get reproduce this issue.

Screencast: http://www.screencast.com/t/uogZuf6U 

Environment Info:

=== Xamarin Studio ===

Version 5.5 (build 227)
Installation UUID: 011d70a5-dede-428b-ab04-ef451c2e539d
Runtime:
	Mono 3.10.0 ((detached/47db868)
	GTK+ 2.24.23 (Raleigh theme)

	Package version: 310000019

=== Apple Developer Tools ===

Xcode 5.1 (5084)
Build 5B130a

=== Xamarin.Mac ===

Version: 1.10.0.13 (Starter Edition)

=== Xamarin.Android ===

Version: 4.18.0 (Enterprise Edition)
Android SDK: /Users/MM/Desktop/android-sdk-macosx
	Supported Android versions:
		2.1    (API level 7)
		2.2    (API level 8)
		2.3    (API level 10)
		3.1    (API level 12)
		3.2    (API level 13)
		4.0    (API level 14)
		4.0.3  (API level 15)
		4.1    (API level 16)
		4.2    (API level 17)
		4.3    (API level 18)
		4.4    (API level 19)
		4.4.87 (API level 20)
		4.5    (API level 21)
Java SDK: /usr
java version "1.7.0_65"
Java(TM) SE Runtime Environment (build 1.7.0_65-b17)
Java HotSpot(TM) 64-Bit Server VM (build 24.65-b04, mixed mode)

=== Xamarin.iOS ===

Version: 8.2.0.193 (Enterprise Edition)
Hash: 959c1e4
Branch: 
Build date: 2014-10-03 00:25:37-0400

=== Build Information ===

Release ID: 505000227
Git revision: 7b721eeec7a2fa4c4f4de0ecd2aed4dc25edac95
Build date: 2014-10-02 15:53:38-04
Xamarin addins: 99ed56b428b31eba1efaace4d82188d6f334e6ca

=== Operating System ===

Mac OS X 10.9.5
Darwin MacMini.local 13.4.0 Darwin Kernel Version 13.4.0
    Sun Aug 17 19:50:11 PDT 2014
    root:xnu-2422.115.4~1/RELEASE_X86_64 x86_64
Comment 3 Jason Smith [MSFT] 2016-03-18 08:18:17 UTC
Thank you for taking the time to submit this report. After reviewing the description of this bug, we no longer believe it affects the current version of Xamarin.Forms. If you are still experiencing the issue after updating your packages, please reopen this report with an attached reproduction.
 
For your convenience, we have created some reproduction best practices viewable here: https://gist.github.com/jassmith/92405c300e54a01dcc6d

Warm regards,
Xamarin Forms Team