Bug 29894 - [Xamarin.Forms.Maps] - Map View appears ontop of new Map when pushing a Page that contains a Map.
Summary: [Xamarin.Forms.Maps] - Map View appears ontop of new Map when pushing a Page ...
Status: RESOLVED INVALID
Alias: None
Product: Forms
Classification: Xamarin
Component: Android ()
Version: 1.4.3
Hardware: PC Windows
: --- normal
Target Milestone: ---
Assignee: Rui Marinho
URL:
Depends on:
Blocks:
 
Reported: 2015-05-08 18:15 UTC by Jon Douglas [MSFT]
Modified: 2015-07-15 16:01 UTC (History)
3 users (show)

Tags: ac ios maps crash functionality
Is this bug a regression?: ---
Last known good build:

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Status:
RESOLVED INVALID

Description Jon Douglas [MSFT] 2015-05-08 18:15:04 UTC
*Description

When using a simple Map() on the MainPage of an Application, if one pushes a Page with another Map ontop of it, it will crop an image of the previous Map() that then sits ontop of the new Map() which renders the page quite difficult from a usability standpoint.

Looking through the View Hierarchy, there does not seem to be an additional view that contains the previous Map view. I've gone ahead and attached this as well within the sample project.

*Replication

Attached with the reproduction is a Debug.keystore that already has been signed to the api key in the sample

PLEASE NOTE: THIS SEEMS TO BE ONLY ON PHYSICAL DEVICES

1) Download the sample

2) Run the project

3) Click "Map"

4) Notice the maps are at first synchronized, but then once you move the map you can see the overlapping effect.

*Xamarin.Forms / Xamarin.Forms.Maps Version

1.4.3.6358-pre2

*Google Play Services Version

Sample uses 24.0.0.0-alpha1, but can confirm it does the same behavior on previous stable versions

Device GPS version - 7.3.29 (Updated to latest)

*Version Information

Microsoft Visual Studio Ultimate 2013
Version 12.0.31101.00 Update 4
Microsoft .NET Framework
Version 4.6.00057

Installed Version: Ultimate

Architecture and Modeling Tools   06181-004-0451031-02320
Microsoft Architecture and Modeling Tools
    
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Team Explorer for Visual Studio 2013   06181-004-0451031-02320
Microsoft Team Explorer for Visual Studio 2013

Visual Basic 2013   06181-004-0451031-02320
Microsoft Visual Basic 2013

Visual C# 2013   06181-004-0451031-02320
Microsoft Visual C# 2013

Visual C++ 2013   06181-004-0451031-02320
Microsoft Visual C++ 2013

Visual F# 2013   06181-004-0451031-02320
Microsoft Visual F# 2013

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Windows Phone SDK 8.0 - ENU   06181-004-0451031-02320
Windows Phone SDK 8.0 - ENU

ApiPortVS   1.0
API portability analyzer.

ASP.NET and Web Tools   12.4.51016.0
Microsoft Web Developer Tools contains the following components:
Support for creating and opening ASP.NET web projects
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Editor extensions for HTML, CSS, and JavaScript
Page Inspector: Inspection tool for ASP.NET web projects
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Server Explorer extensions for Microsoft Azure Websites
Web publishing: Extensions for publishing ASP.NET web projects to hosting providers, on-premises servers, or Microsoft Azure

ASP.NET Web Frameworks and Tools 2012.2   4.1.21001.0
For additional information, visit http://go.microsoft.com/fwlink/?LinkID=309563

ASP.NET Web Frameworks and Tools 2013   5.2.21010.0
For additional information, visit http://www.asp.net/

Color Theme Designer   1.0
Designer for creating new color themes

Common Azure Tools   1.3
Provides common services for use by Azure Mobile Services and Microsoft Azure Tools.

Entity Framework Power Tools   1.0
Adds useful design-time DbContext features to the Visual Studio Solution Explorer context menu. 

When right-clicking on a file containing a derived DbContext class, the following context menu functions are supported:

1) View Entity Data Model - Displays the underlying Code First model in the Entity Framework designer.
2) View Entity Data Model XML - Displays the EDMX XML representing the underlying Code First model.
3) Generate Views - Generates pre-compiled views used by the EF runtime to improve start-up performance. Adds the generated views file to the containing project.

File Nesting   1.0
Automatically nest files based on file name and enables developers to nest and unnest any file manually

JetBrains ReSharper 8.2   Full Edition build 8.2.0.2160 on 2014-03-21T01:53:08
JetBrains ReSharper 8.2 package for Microsoft Visual Studio. For more information about ReSharper, visit http://www.jetbrains.com/resharper/. Copyright © 2003–2015 JetBrains, Inc.

Microsoft Advertising SDK for Windows Phone   
Microsoft Advertising SDK for Windows Phone
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Microsoft Azure Mobile Services Tools   1.3
Microsoft Azure Mobile Services Tools

Microsoft XNA Game Studio   4.0
Microsoft XNA Game Studio 4.0
Build 4.0.30901.0

NuGet Package Manager   2.8.50926.663
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PowerShell Tools   1.3
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PreEmptive Analytics Visualizer   1.2
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SAPReferenceManager   1.0
Manages References to Shared Projects

SQL Server Data Tools   12.0.41012.0
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Windows Azure Tools   2.3
Windows Azure Tools for Microsoft Visual Studio 2013 - v2.3.20320.1602

Windows Phone 8.1 SDK Integration   1.0
This package integrates the tools for the Windows Phone 8.1 SDK into the menus and controls of Visual Studio.

Xamarin   3.11.445.0 (5061f92)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.

Xamarin.Android   5.1.0.115 (d23da369e436488f38c8ab8fe8a9ae7d9ea5256b)
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   8.10.0.0 (7741cc495ab0baf04ff0405d0604bc27f0ecae2e)
Visual Studio extension to enable development for Xamarin.iOS.

Xamarin.iOS Unified Migration   1.0
Automated migration for Xamarin iOS Classic projects to Unified

Xamarin.TestCloud.Integration   1.0
Early preview of Xamarin Test Cloud integration

XNA Game Studio 4.0   1.0
Information about my package
Comment 2 Chris King 2015-05-19 19:32:23 UTC
Runnging the repro I get an exception: "Event registration is overwriting existing delegate. Either just use events or your own delegate: Xamarin.Forms.Maps.iOS.MapDelegateMapKing.MKMapView+_MKMapViewDelegate." Code looks reasonable. I wouldn't expect this exception.
Comment 4 Rui Marinho 2015-07-10 08:05:07 UTC
Jon can you send me a screencast or screenshots so i can make sure i m seeing the same as you? 

Thanks.
Comment 5 Jon Douglas [MSFT] 2015-07-15 16:01:15 UTC
Cannot replicate on Nexus 5 using latest 1.4.3.6376 stable thus marking Invalid.