Xamarin.Forms 2.1.0.6500-pre1

Build native UIs for iOS, Android, and Windows Phone from a single, shared C# codebase

This is a prerelease version of Xamarin.Forms.
There is a newer version of this package available.
See the version list below for details.
Install-Package Xamarin.Forms -Version 2.1.0.6500-pre1
dotnet add package Xamarin.Forms --version 2.1.0.6500-pre1
<PackageReference Include="Xamarin.Forms" Version="2.1.0.6500-pre1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Xamarin.Forms --version 2.1.0.6500-pre1
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

## New Features ##

### ControlTemplates ###

ControlTemplates have been introduced into the 2.1.0 branch, and have been included on the following types:

- [`ContentPage`](https://developer.xamarin.com/api/type/Xamarin.Forms.ContentPage/)
- [`ContentView`](https://developer.xamarin.com/api/type/Xamarin.Forms.ContentView/)
- `TemplatedPage`
- `TemplatedView`

`TemplatedPage` and `TemplatedView` now serve as the base class for `ContentPage` and `ContentView`. ControlTemplates can be used to define the visual appearance of a Control or [`Page`](http://developer.xamarin.com/api/type/Xamarin.Forms.Page/) while providing a clean separation from the visual hierarchy and the Content itself. ControlTemplates can be applied via Style to greatly expand themeability in Xamarin.Forms.

Along with ControlTemplates the concept of TemplateBindings has been introduced. TemplateBindings work identically to normal Bindings however their Source is automatically set to the parent of the target view which owns the ControlTemplate. Usage of a TemplateBinding outside of a ControlTemplate is not supported.

For more details on how to use ControlTemplates see here: http://xfcomplete.net/general/2016/01/20/control-templates/

### DataTemplateSelector ###

IDataTempalteSelectors allow the selection of a DataTemplate at runtime per item in a ListView.ItemsSource.

Usage:

```csharp
class MyDataTemplateSelector : DataTemplateSelector
{
public MyDataTemplateSelector ()
{
// Retain instances!
this.templateOne = new DataTemplate (typeof (ViewA));
this.templateTwo = new DataTemplate (typeof (ViewB));
}

protected override DataTemplate OnSelectTemplate (object item, BindableObject container)
{
if (item is double)
return this.templateOne;
return this.templateTwo;
}

private readonly DataTemplate templateOne;
private readonly DataTemplate templateTwo;
}
```

```xml
<ListView DataTemplate=local:MyDataTemplateSelector />
```

DataTemplateSelectors have the following limitations:

- No more than 20 templates per ListView on Android
- The DataTemplateSelector subclass MUST always return the same template for the same data if queried multiple times
- The DataTemplateSelector must not return another DataTemplateSelector
- The DataTemplateSelector must not return new instances of a DataTemplate on each call, instead the same instance must be returned. Failure to do so will effectively disable virtualization and lead to an enormous memory leak. Don't do this.

### Effects ###

Effects provide an easy way to customize the native look and feel of controls without having to resort to a complete Custom Renderer.   You can use these to customize the native controls, for example, the following Effect shows how to create a Border effect on iOS that will set a 2 pixel purple outline on the control:

```csharp
// located inside iOS specific codebase
public class BorderEffect : PlatformEffect
{
protected override void OnAttached ()
{
Control.Layer.BorderColor = UIColor.Purple.CGColor;
Control.Layer.BorderWidth = 2;
}

protected override void OnDetached ()
{
Control.Layer.BorderWidth = 0;
}
}
```

To apply this effect, all you have to do is attached it via the `IList<Effect> Effects` collection on Element.   This is a much simpler way of fine tuning your user interface with native touches.

### Other Improvements ###

- HasUnevenRows dynamic sizing support;
- ListView Virtualization is now supported on Windows ;
- Generic versions of Create () BindableProperty are no longer supported and deprecated;
- The Entry/Editor updates on WP8 and WinRT are now consistent with other platforms;

## Bug Fixes ##

- [Bug 21780](https://bugzilla.xamarin.com/show_bug.cgi?id=21780) - Windows Phone Editor control has black background with black text, background turns to white when editing.
- [Bug 24769](https://bugzilla.xamarin.com/show_bug.cgi?id=24769) - [Win Phone/winrt] Progress Bar in listview item not working
- [Bug 26868](https://bugzilla.xamarin.com/show_bug.cgi?id=26868) - GroupHeaders do not extend on Windows Phone and WINRT
- [Bug 30370](https://bugzilla.xamarin.com/show_bug.cgi?id=30370) - Background Color on an Entry Control is Applied to the Padding
- [Bug 32615](https://bugzilla.xamarin.com/show_bug.cgi?id=32615) - [Android] OnAppearing is not called on previous page when modal page is popped
- [Bug 32847](https://bugzilla.xamarin.com/show_bug.cgi?id=32847) - Picker text is cleared after selecting an item, whether Picker, DatePicker, or TimePicker
- [Bug 33268](https://bugzilla.xamarin.com/show_bug.cgi?id=33268) - Picker is broken on Windows 8.1
- [Bug 33870](https://bugzilla.xamarin.com/show_bug.cgi?id=33870) - crash when the listview selection is disabled on Windows Phone 8.1 RT
- [Bug 35490](https://bugzilla.xamarin.com/show_bug.cgi?id=35490) - Label Text Misaligned in Windows Phone 8.1 and WinRT (Xamarin Nuget Version 1.5.1.6471)
- [Bug 35811](https://bugzilla.xamarin.com/show_bug.cgi?id=35811) - Navigation.PushAsync from TabbedPage then hit back button causes crash
- [Bug 36171](https://bugzilla.xamarin.com/show_bug.cgi?id= 36171) - WinRT Entry UI not updating on TextChanged
- [Bug 36174](https://bugzilla.xamarin.com/show_bug.cgi?id= 36174) - Android Search Bar vertical text alignment in Forms 2.0
- [Bug 36251](https://bugzilla.xamarin.com/show_bug.cgi?id=36251) - Issues when switching between pages of a TabbedPage on iOS
- [Bug 36422](https://bugzilla.xamarin.com/show_bug.cgi?id=36422) - XamlC Fails When using X:Array in Xaml. Throws NullReferenceExceptio
- [Bug 36559](https://bugzilla.xamarin.com/show_bug.cgi?id=36559) - [WP] Navigating to a ContentPage with a Grid inside a TableView affects Entry heights
- [Bug 36649](https://bugzilla.xamarin.com/show_bug.cgi?id=36649) - LineBreakMode.NoWrap is handled incorrectly on Windows Phone 8.1 RT
- [Bug 36687](https://bugzilla.xamarin.com/show_bug.cgi?id=36687) - On WinPhone 8.1 RT, the background color used in Entry fields is not as expected
- [Bug 36730](https://bugzilla.xamarin.com/show_bug.cgi?id=36730) - OnStart / OnResume are not called on WP8.1 and UWP
- [Bug 36778](https://bugzilla.xamarin.com/show_bug.cgi?id=36778) - ListView on UWP doesn't display Detail line with TextCell
- [Bug 37306](https://bugzilla.xamarin.com/show_bug.cgi?id=37306) - XamlC doesn´t support adding x:String in resource dictionary
- [Bug 37675](https://bugzilla.xamarin.com/show_bug.cgi?id=37675) - Style PropertyChanged called before the Style is applied
- [Bug 37779](https://bugzilla.xamarin.com/show_bug.cgi?id=37779) - TabbedPageRenderer throws exceptions on Android 4.0.4 when using Material Design theme
- Fixes to OnAppearing/OnDisappearing;
- Fixes to PanGestureRecognizer on android;
- Fixes to animation safety;
- UWP fix headerzoom;
- Fixes an issue where images sometimes didn't load on WP8;


## Known Issues ##

- WinRT reloads toolbar items on navigation even when they haven't changed

Showing the top 10 GitHub repositories that depend on Xamarin.Forms:

Repository Stars
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Prism is a framework for building loosely coupled, maintainable, and testable XAML applications in WPF, Windows 10 UWP, and Xamarin Forms.
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Version History

Version Downloads Last updated
4.2.0.709249 8,292 8/21/2019
4.2.0.673161-pre3 3,934 8/7/2019
4.2.0.618605-pre2 5,403 7/24/2019
4.2.0.608146-pre1 3,006 7/16/2019
4.1.0.709244 543 8/21/2019
4.1.0.673156 37,778 8/7/2019
4.1.0.618606 50,454 7/24/2019
4.1.0.581479 64,177 7/9/2019
4.1.0.555618 81,003 6/28/2019
4.1.0.496342-pre2 6,417 6/13/2019
4.1.0.483098-pre1 4,336 6/5/2019
4.0.0.709238 116 8/21/2019
4.0.0.618610 1,310 7/24/2019
4.0.0.540366 24,447 6/27/2019
4.0.0.497661 53,857 6/13/2019
4.0.0.482894 43,804 6/3/2019
4.0.0.425677 153,747 5/14/2019
4.0.0.394984-pre10 9,153 5/3/2019
4.0.0.346134-pre9 13,431 4/18/2019
4.0.0.304370-pre8 9,999 4/3/2019
4.0.0.250467-pre7 6,842 3/20/2019
4.0.0.232914-pre6 7,092 3/14/2019
4.0.0.169046-pre5 5,847 2/21/2019
4.0.0.135214-pre4 4,490 2/6/2019
4.0.0.94569-pre3 4,201 1/24/2019
4.0.0.62955-pre2 13,051 1/10/2019
4.0.0.8055-pre1 13,523 12/4/2018
3.6.0.709228 195 8/21/2019
3.6.0.539721 13,629 6/27/2019
3.6.0.344457 134,780 4/18/2019
3.6.0.293080 85,295 4/3/2019
3.6.0.264807 146,692 3/19/2019
3.6.0.220655 96,986 3/6/2019
3.6.0.169048-pre2 517 2/21/2019
3.6.0.135200-pre1 4,601 2/6/2019
3.5.0.274416 12,806 3/26/2019
3.5.0.169047 82,889 2/20/2019
3.5.0.129452 113,277 2/6/2019
3.5.0.94564-pre3 1,104 1/24/2019
3.5.0.62956-pre2 1,010 1/10/2019
3.4.0.1039999 9,976 3/26/2019
3.4.0.1029999 86,329 1/24/2019
3.4.0.1009999 100,612 1/4/2019
3.4.0.1008975 424,613 11/15/2018
3.4.0.987044-pre2 2,321 11/8/2018
3.4.0.925479-pre1 10,526 10/18/2018
3.3.0.967583 162,618 11/1/2018
3.3.0.912540 115,489 10/18/2018
3.3.0.893527-pre3 7,445 10/11/2018
3.3.0.871608-pre2 11,470 10/1/2018
3.3.0.840541-pre1 5,701 9/20/2018
3.2.0.871581 109,057 10/3/2018
3.2.0.839982 150,651 9/17/2018
3.2.0.809874-pre3 3,720 9/10/2018
3.2.0.729530-pre2 12,443 8/14/2018
3.2.0.637442-pre1 10,146 7/17/2018
3.1.0.697729 340,314 8/1/2018
3.1.0.637273 103,521 7/11/2018
3.1.0.583944 141,255 6/20/2018
3.1.0.561732-pre4 6,233 6/11/2018
3.1.0.550168-pre3 3,062 6/6/2018
3.1.0.530888-pre2 1,885 6/4/2018
3.1.0.469394-pre1 11,330 5/9/2018
3.0.0.561731 144,198 6/11/2018
3.0.0.550146 27,565 6/6/2018
3.0.0.530893 21,159 6/4/2018
3.0.0.482510 241,103 5/14/2018
3.0.0.446417 130,822 5/1/2018
3.0.0.427558-pre4 9,045 4/25/2018
3.0.0.354232-pre3 14,048 4/5/2018
3.0.0.296286-pre2 8,329 3/20/2018
2.5.1.527436 90,482 5/4/2018
2.5.1.444934 167,938 4/4/2018
2.5.1.392594-pre3 4,251 3/21/2018
2.5.1.340284-pre2 6,408 3/9/2018
2.5.1.317207-pre1 5,740 3/1/2018
2.5.0.280555 321,041 2/16/2018
2.5.0.122203 330,358 12/18/2017
2.5.0.121934 214,494 11/28/2017
2.5.0.91635 156,555 11/16/2017
2.5.0.77107 29,971 11/13/2017
2.5.0.75255-pre3 5,507 11/10/2017
2.5.0.19271-pre2 9,449 10/20/2017
2.4.0.91020 48,981 11/16/2017
2.4.0.74863 34,925 11/10/2017
2.4.0.38779 61,327 10/30/2017
2.4.0.18342 55,756 10/20/2017
2.4.0.282 162,964 9/29/2017
2.4.0.280 200,265 9/27/2017
2.4.0.275-pre3 8,190 9/19/2017
2.4.0.269-pre2 13,750 8/29/2017
2.4.0.266-pre1 19,710 8/16/2017
2.3.5.256-pre6 35,834 6/29/2017
2.3.5.255-pre5 5,003 6/26/2017
2.3.5.239-pre3 28,146 5/11/2017
2.3.5.235-pre2 11,366 4/26/2017
2.3.5.233-pre1 9,246 4/13/2017
2.3.4.270 144,754 8/29/2017
2.3.4.267 67,671 8/16/2017
2.3.4.247 417,655 5/16/2017
2.3.4.231 209,826 4/12/2017
2.3.4.224 249,937 3/29/2017
2.3.4.221-pre6 7,514 3/27/2017
2.3.4.214-pre5 10,404 3/14/2017
2.3.4.212-pre4 6,357 3/10/2017
2.3.4.211-pre3 4,170 3/9/2017
2.3.4.192-pre2 19,491 2/3/2017
2.3.4.184-pre1 13,053 1/13/2017
2.3.3.193 245,982 2/1/2017
2.3.3.180 210,650 1/5/2017
2.3.3.175 118,275 12/6/2016
2.3.3.168 66,716 11/23/2016
2.3.3.166-pre4 8,089 11/3/2016
2.3.3.163-pre3 6,500 10/17/2016
2.3.3.152-pre2 16,130 9/15/2016
2.3.2.127 283,936 9/14/2016
2.3.2.118-pre1 6,920 8/3/2016
2.3.1.114 156,284 8/3/2016
2.3.1.113-pre3 3,929 7/19/2016
2.3.1.111-pre2 4,869 7/4/2016
2.3.1.110-pre1 2,576 6/29/2016
2.3.0.107 207,054 6/29/2016
2.3.0.49 87,907 6/16/2016
2.3.0.46-pre3 16,226 5/30/2016
2.3.0.38-pre2 13,292 4/27/2016
2.3.0.34-pre1 8,880 4/27/2016
2.2.0.45 136,263 5/30/2016
2.2.0.31 128,029 4/27/2016
2.2.0.23-pre4 3,203 4/20/2016
2.2.0.18-pre3 2,419 4/20/2016
2.2.0.5-pre2 16,119 4/8/2016
2.2.0.4-pre1 18,621 4/5/2016
2.1.0.6529 98,575 3/13/2016
2.1.0.6526 17,640 3/9/2016
2.1.0.6524 36,604 3/2/2016
2.1.0.6521 12,199 3/1/2016
2.1.0.6517-pre5 2,275 2/18/2016
2.1.0.6513-pre4 2,251 2/9/2016
2.1.0.6508-pre3 2,571 1/28/2016
2.1.0.6503-pre2 7,164 1/22/2016
2.1.0.6501-pre1 1,721 1/21/2016
2.1.0.6500-pre1 1,547 1/20/2016
2.0.1.6505 93,436 1/28/2016
2.0.1.6495 75,251 1/20/2016
2.0.1.6492-pre1 4,001 12/3/2015
2.0.0.6490 97,764 12/1/2015
2.0.0.6484 17,955 11/21/2015
2.0.0.6482 240,468 11/17/2015
1.5.2.6478-pre3 1,426 11/17/2015
1.5.2.6477-pre2 4,053 11/10/2015
1.5.2.6469-pre1 2,341 10/20/2015
1.5.1.6471 76,909 10/20/2015
1.5.1.6468 4,064 10/20/2015
1.5.1.6460-pre2 1,816 10/13/2015
1.5.1.6455-pre1 3,171 10/2/2015
1.5.0.6447 55,472 9/25/2015
1.5.0.6446 21,825 9/16/2015
1.5.0.6404-pre3 3,465 8/25/2015
1.5.0.6401-pre2 1,666 8/21/2015
1.5.0.6396-pre1 2,107 8/5/2015
1.4.4.6449 2,900 9/25/2015
1.4.4.6443 1,809 9/16/2015
1.4.4.6392 77,308 7/29/2015
1.4.4.6391 2,163 7/28/2015
1.4.4.6387 3,097 7/27/2015
1.4.4.6379-pre3 1,686 7/20/2015
1.4.4.6378-pre2 1,509 7/16/2015
1.4.4.6377-pre1 1,510 7/14/2015
1.4.3.6376 42,724 7/9/2015
1.4.3.6374 16,783 7/1/2015
1.4.3.6372 2,234 6/30/2015
1.4.3.6364-pre3 2,480 6/16/2015
1.4.3.6358-pre2 5,925 4/24/2015
1.4.3.6356-pre1 1,598 4/21/2015
1.4.2.6359 62,718 4/30/2015
1.4.2.6355 14,534 4/21/2015
1.4.2.6353-pre2 2,651 3/31/2015
1.4.2.6350-pre1 1,704 3/30/2015
1.4.1.6349 44,676 3/30/2015
1.4.1.6347-pre2 3,388 3/19/2015
1.4.1.6342-pre1 1,844 3/10/2015
1.4.0.6341 29,085 3/9/2015
1.4.0.6340-pre2 2,686 3/6/2015
1.4.0.6336-pre1 1,672 3/3/2015
1.3.5.6337 5,264 3/5/2015
1.3.5.6335 25,296 3/2/2015
1.3.5.6333-pre1 2,245 2/17/2015
1.3.4.6332 19,379 2/17/2015
1.3.4.6331-pre4 1,698 2/13/2015
1.3.4.6329-pre3 1,431 2/12/2015
1.3.4.6328-pre2 1,436 2/11/2015
1.3.4.6325-pre1 1,400 2/9/2015
1.3.3.6323 53,205 2/9/2015
1.3.3.6322-pre3 1,397 2/6/2015
1.3.3.6321-pre2 1,557 2/4/2015
1.3.3.6318-pre1 1,558 2/2/2015
1.3.2.6316 7,901 2/3/2015
1.3.2.6313-pre3 1,546 1/30/2015
1.3.2.6309-pre2 1,595 1/28/2015
1.3.2.6299-pre1 2,300 1/20/2015
1.3.1.6296 56,956 1/4/2015
1.3.1.6294-pre1 4,623 12/24/2014
1.3.0.6292 9,768 12/24/2014
1.3.0.6286-pre4 2,303 12/19/2014
1.3.0.6284-pre3 1,805 12/12/2014
1.3.0.6280-pre2 1,754 12/9/2014
1.3.0.6275-pre1 8,036 11/12/2014
1.2.3.6257 39,299 10/2/2014
1.2.3.6256-pre4 2,442 9/26/2014
1.2.3.6255-pre3 2,851 9/20/2014
1.2.3.6249-pre2 2,020 9/9/2014
1.2.3.6246-pre1 4,583 8/15/2014
1.2.2.6243 28,895 7/30/2014
1.2.2.6241-pre3 2,952 7/28/2014
1.2.2.6240-pre2 4,790 7/22/2014
1.2.2.6238-pre1 3,949 7/17/2014
1.2.1.6229 8,740 7/14/2014
1.1.1.6206 14,406 6/19/2014
1.1.0.6201 13,767 6/12/2014
1.0.6197 4,372 6/4/2014
1.0.6188 11,944 5/28/2014
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