Bug 43955 - Page “jumps” navigation bar height when navigating between pages
Summary: Page “jumps” navigation bar height when navigating between pages
Alias: None
Product: Forms
Classification: Xamarin
Component: Forms ()
Version: 2.3.1
Hardware: PC Mac OS
: Normal normal
Target Milestone: ---
Assignee: Bugzilla
: 42053 ()
Depends on:
Reported: 2016-09-01 21:06 UTC by Ashley Gazich [MSFT]
Modified: 2016-10-04 17:33 UTC (History)
6 users (show)

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

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Description Ashley Gazich [MSFT] 2016-09-01 21:06:56 UTC
### Customer report

We have a navigation page that starts with a content page and navbar hidden
NavigationPage.SetHasNavigationBar (this, false);

When using Navigation.Push.Async to go to another page, there is a "jump" at the bottom of view. It's like it adds the height for the navigation bar on the next page.
On iOS it causes the obvious jump if you set the background color to anything but white.
On Android it seems to only cause this "jump" when navigating back to the previous page.

Here there is an animation of the problem: http://recordit.co/lNthPGKlJL

### Test case


### Xamarin Support notes

I was able to reproduce this behavior on XS latest Stable with the customer’s sample using the following:

Xamarin.Forms versions

iPhone 6 simulator on iOS 8.3 & iOS 9.3
Samsung Galaxy S5 on Android version 6.0.1

### Customer version info

Microsoft Visual Studio Enterprise 2015
Version 14.0.25425.01 Update 3
Microsoft .NET Framework
Version 4.6.01038

Installed Version: Enterprise

Architecture and Modeling Tools 00322-90000-14483-AA825
Microsoft Architecture and Modeling Tools

UML® and Unified Modeling Language™ are trademarks or registered trademarks of the Object Management Group, Inc. in the United States and other countries.

Visual Basic 2015 00322-90000-14483-AA825
Microsoft Visual Basic 2015

Visual C# 2015 00322-90000-14483-AA825
Microsoft Visual C# 2015

Visual C++ 2015 00322-90000-14483-AA825
Microsoft Visual C++ 2015

Windows Phone SDK 8.0 - ENU 00322-90000-14483-AA825
Windows Phone SDK 8.0 - ENU

Application Insights Tools for Visual Studio Package 7.5.00830.1
Application Insights Tools for Visual Studio

ASP.NET and Web Tools 2015 (RC1 Update 1) 14.1.20203.0
ASP.NET and Web Tools 2015 (RC1 Update 1)

ASP.NET Web Frameworks and Tools 2012.2 4.1.41102.0
For additional information, visit http://go.microsoft.com/fwlink/?LinkID=309563

ASP.NET Web Frameworks and Tools 2013 5.2.40314.0
For additional information, visit http://www.asp.net/

Azure App Service Tools v2.9.1 14.0.20622.0
Azure App Service Tools v2.9.1

Azure Data Lake Node 1.0
This package contains the Data Lake integration nodes for Server Explorer.

Azure Data Lake Tools for Visual Studio 2.0.6000.0
Microsoft Azure Data Lake Tools for Visual Studio

Common Azure Tools 1.8
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

GorillaPlayerPackage Extension 1.0
GorillaPlayerPackage Visual Studio Extension Detailed Info

JavaScript Language Service 2.0
JavaScript Language Service

JavaScript Project System 2.0
JavaScript Project System

Microsoft Azure HDInsight HQL Service 2.0.6000.0
Language service for Hive query

Microsoft Azure HDInsight Tools for Visual Studio 2.0.6000.0
An integrated development environment for HDInsight application development.

Microsoft Azure Mobile Services Tools 1.4
Microsoft Azure Mobile Services Tools

Microsoft Azure Tools 2.9
Microsoft Azure Tools for Microsoft Visual Studio 2015 - v2.9.40701.9

NuGet Package Manager 3.4.4
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.

Manage localization of all ResX-Based resources in one place. Shows all resources of a solution and let's you edit the strings and their localizations in a well-arranged data grid.

SQL Server Data Tools 14.0.60519.0
Microsoft SQL Server Data Tools

Telerik ASP.NET MVC VSExtensions 2016.2.712.0
Telerik UI for ASP.NET MVC VSExtensions

ToolWindowHostedEditor 1.0
Hosting json editor into a tool window

TypeScript tools for Visual Studio

Visual Studio Tools for Universal Windows Apps 14.0.25420.01
The Visual Studio Tools for Universal Windows apps allow you to build a single universal app experience that can reach every device running Windows 10: phone, tablet, PC, and more. It includes the Microsoft Windows 10 Software Development Kit.

Xamarin (fcbe082)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.

Xamarin Forms Player 1.0
Preview Xamarin.Forms XAML on devices and simulators, with support for data-binding via JSON dummy view models.

Xamarin.Android (1cf254d)
Visual Studio extension to enable development for Xamarin.Android.

Xamarin.iOS (f37444a)
Visual Studio extension to enable development for Xamarin.iOS.
Comment 2 Paul DiPietro [MSFT] 2016-10-04 17:33:06 UTC
*** Bug 42053 has been marked as a duplicate of this bug. ***