Hi guys,
We have a problem with tabScrollView.ScrollToAsync on the iPhone, but not on Android.
(This problem also exists on the Stable channel)
If you look at the attached image, Android_1.jpg, you will see 3 buttons 'Home', 'Our Menu' and 'Bad News'.
When you select the middle button "Our Menu", the tabScrollView.ScrollToAsync moves the selected button so that it is visible and allows you to scroll right if you wish to choose another button. (Android_2)
Repeating this on the iPhone however hides any other buttons to the right of the selected button and does not allow you to scroll right. Effectively, it truncates the list at the selected point.
iPhone1.jpg is the same as Android_1.jpg, but iPhone2.jpg shows only 2 buttons available, instead of the original 3 as per Android_2.jpg
If you then select the first button, in this case "Home", the full list is available to scroll again.
Hopefully the code snippets below will give you an idea of the problem.
tabStack = new StackLayout
{
Spacing = 0,
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.Start,
VerticalOptions = LayoutOptions.Start
};
tabScrollView = new ScrollView
{
Content = tabStack,
Orientation = ScrollOrientation.Horizontal,
HorizontalOptions = LayoutOptions.Start,
VerticalOptions = LayoutOptions.Start
};
var mainHorizStack = new StackLayout
{
Spacing = 0,
Orientation = StackOrientation.Horizontal,
HorizontalOptions = LayoutOptions.Start,
VerticalOptions = LayoutOptions.Start
};
mainHorizStack.Children.Add(tabScrollView);
//---------------------
Button activeButton = null;
foreach (Advert ad in adsForMenuList)
{
oddTab = !oddTab;
bool selected = (ad.i.Id == selectedAdvertId); // Defined elsewhere
var button = new Button
{
Text = ad.i.TabName, // Assigns the NAME of the button
FontSize = 18,
TextColor = Color.Yellow,
BackgroundColor = oddTab ? Color.FromHex("26A9E1") : Color.FromHex("47B6E6"),
CommandParameter = ad.i.Id, // The adverts unique ID.
HeightRequest = 40
};
if (selected)
{
activeButton = button;
activeButton.Focus();
button.BackgroundColor = Color.Yellow;
button.TextColor = Color.Black;
button.FontSize = 20;
button.FontAttributes = FontAttributes.Bold;
}
button.Clicked += async (sender, ea) =>
{
activeButton = button;
await Task.Yield();
if (activeButton != null)
{
Button scrollBtn = activeButton;
activeButton = null;
await tabScrollView.ScrollToAsync(scrollBtn, ScrollToPosition.MakeVisible, true);
}
};
tabStack.Children.Add(button);
}
//---------------------------------------------------------------------------------------------------------------
We have the latest Alpha release of Xamarin.Forms installed on all systems as of 21/01/16
Microsoft Visual Studio Professional 2013
Version 12.0.30501.00 Update 2
Microsoft .NET Framework
Version 4.5.51209
Installed Version: Professional
LightSwitch for Visual Studio 2013 06177-004-0444002-02053
Microsoft LightSwitch for Visual Studio 2013
Office Developer Tools - May 2014 Update ENU 06177-004-0444002-02053
Microsoft Office Developer Tools for Visual Studio 2013 - May 2014 Update ENU
Team Explorer for Visual Studio 2013 06177-004-0444002-02053
Microsoft Team Explorer for Visual Studio 2013
Visual Basic 2013 06177-004-0444002-02053
Microsoft Visual Basic 2013
Visual C# 2013 06177-004-0444002-02053
Microsoft Visual C# 2013
Visual C++ 2013 06177-004-0444002-02053
Microsoft Visual C++ 2013
Visual F# 2013 06177-004-0444002-02053
Microsoft Visual F# 2013
Visual Studio 2013 Code Analysis Spell Checker 06177-004-0444002-02053
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.
ASP.NET and Web Tools 2013.2.50425
Microsoft Web Developer Tools contains the following components:
Support for creating and opening ASP.NET web projects
Browser Link: A communication channel between Visual Studio and browsers
Editor extensions for HTML, CSS, and JavaScript
Page Inspector: Inspection tool for ASP.NET web projects
Scaffolding: A framework for building and running code generators
Server Explorer extensions for Windows Azure Web Sites
Web publishing: Extensions for publishing ASP.NET web projects to hosting providers, on-premises servers, or Windows 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 5.1.20409.0
For additional information, visit http://www.asp.net/
Common Azure Tools 1.1
Provides common services for use by Azure Mobile Services and Windows Azure Tools.
NuGet Package Manager 2.8.60318.734
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.
SQL Server Data Tools 12.0.40403.0
Microsoft SQL Server Data Tools
Windows Azure Mobile Services Tools 1.1
Windows Azure Mobile Services Tools
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.
Workflow Manager Tools 1.0 1.0
This package contains the necessary Visual Studio integration components for Workflow Manager.
Xamarin 4.0.1.74 (9f3b5a0)
Visual Studio extension to enable development for Xamarin.iOS and Xamarin.Android.
Xamarin.Android 6.0.1.9 (8dd1a77)
Visual Studio plugin to enable development for Xamarin.Android.
Xamarin.iOS 9.4.1.21 (c71a120)
Visual Studio extension to enable development for Xamarin.iOS.
EDIT
The attached image shows all 4 examples if you click on it 