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Created attachment 13710 [details]
On Xamarin.Forms WinRT apps that use a Grid with one or more rows set to ‘*’, the page’s layout looks like it extends beyond the bottom of the screen and hides any elements that are placed at the bottom of the layout.
This seems to only happen when the page is pushed modally though. And it also happens with StackLayouts if their VerticalOptions are set to FillAndExpand (also demonstrated in sample solution).
However, I did also notice that other pages with Grids/StackLayouts that are pushed normally would start showing the same issue after I pushed a page modally.
I tested this using Forms 1.5.1 and 1.5.2-pre1. The issue does occur in WP8 SL projects either.
### Steps to Reproduce
1. Run the WinRT project in the attached solution.
2. Select “Push Grid Async”
3. Go back to the previous screen
4. Select “Push Grid ModalAsync”
5. Return to the previous screen, and select “Push Async” again
### Actual Results
When the page is pushed modally, the elements at the bottom of the layout that were visible when the page was navigated to normally are now hidden. Looking closely, it seems like they are rendered, however just below the screen’s height.
Also, when the page is subsequently pushed normally, it begins to demonstrate the same layout issue, even though it previously did not.
### Expected Results
The Grid’s row heights are calculated correctly so that all rows are visible on the screen.
### Environment Info
Microsoft Visual Studio Professional 2013
Version 12.0.40629.00 Update 5
Microsoft .NET Framework
Installed Version: Professional
Team Explorer for Visual Studio 2013 06177-004-0444002-02995
Microsoft Team Explorer for Visual Studio 2013
Visual Basic 2013 06177-004-0444002-02995
Microsoft Visual Basic 2013
Visual C# 2013 06177-004-0444002-02995
Microsoft Visual C# 2013
Visual C++ 2013 06177-004-0444002-02995
Microsoft Visual C++ 2013
Visual F# 2013 06177-004-0444002-02995
Microsoft Visual F# 2013
Visual Studio 2013 Code Analysis Spell Checker 06177-004-0444002-02995
Microsoft® Visual Studio® 2013 Code Analysis Spell Checker
Portions of International CorrectSpell™ spelling correction system © 1993 by Lernout & Hauspie Speech Products N.V. All rights reserved.
The American Heritage® Dictionary of the English Language, Third Edition Copyright © 1992 Houghton Mifflin Company. Electronic version licensed from Lernout & Hauspie Speech Products N.V. All rights reserved.
Windows Phone SDK 8.0 - ENU 06177-004-0444002-02995
Windows Phone SDK 8.0 - ENU
Application Insights Tools for Visual Studio Package 1.0
Application Insights Tools for Visual Studio
Common Azure Tools 1.4
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.
Microsoft Azure Mobile Services Tools 1.4
Microsoft Azure Mobile Services Tools
NuGet Package Manager 2.8.60610.756
NuGet Package Manager in Visual Studio. For more information about NuGet, visit http://docs.nuget.org/.
PreEmptive Analytics Visualizer 1.2
Microsoft Visual Studio extension to visualize aggregated summaries from the PreEmptive Analytics product.
Xamarin 3.11.1539.0 (d7caae5)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android 184.108.40.206 (53fce3730830417896a42f365a5ba35f1ee58d9d)
Visual Studio plugin to enable development for Xamarin.Android.
Xamarin.Forms Intellisense 1.0
Provides intellisense for Xamarin.Forms in the XML editor.
Xamarin.iOS 220.127.116.11 (73db6324ad6864caae30bf4010c185598d262e69)
Visual Studio extension to enable development for Xamarin.iOS.
Xamarin.iOS Unified Migration 1.0
Automated migration for Xamarin iOS Classic projects to Unified
Early preview of Xamarin Test Cloud integration
Still present in 18.104.22.16805
Thank you for taking the time to submit this report. After reviewing the description of this bug, we believe it no longer 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
Xamarin Forms Team