Xamarin.Forms 2.1.0.6521

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

There is a newer version of this package available.
See the version list below for details.
Install-Package Xamarin.Forms -Version 2.1.0.6521
dotnet add package Xamarin.Forms --version 2.1.0.6521
<PackageReference Include="Xamarin.Forms" Version="2.1.0.6521" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Xamarin.Forms --version 2.1.0.6521
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 ###

IDataTemplateSelectors 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

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Version History

Version Downloads Last updated
4.3.0.851321-pre3 3,737 10/2/2019
4.3.0.819712-pre2 5,758 9/19/2019
4.3.0.778476-pre1 5,490 9/11/2019
4.2.0.848062 31,403 10/2/2019
4.2.0.815419 43,919 9/19/2019
4.2.0.778463 39,036 9/11/2019
4.2.0.709249 83,253 8/21/2019
4.2.0.673161-pre3 6,685 8/7/2019
4.2.0.618605-pre2 8,092 7/24/2019
4.2.0.608146-pre1 3,511 7/16/2019
4.1.0.778454 6,398 9/11/2019
4.1.0.709244 16,934 8/21/2019
4.1.0.673156 74,344 8/7/2019
4.1.0.618606 77,108 7/24/2019
4.1.0.581479 89,945 7/9/2019
4.1.0.555618 150,780 6/28/2019
4.1.0.496342-pre2 7,068 6/13/2019
4.1.0.483098-pre1 4,746 6/5/2019
4.0.0.709238 1,680 8/21/2019
4.0.0.618610 2,171 7/24/2019
4.0.0.540366 31,107 6/27/2019
4.0.0.497661 63,269 6/13/2019
4.0.0.482894 49,663 6/3/2019
4.0.0.425677 179,005 5/14/2019
4.0.0.394984-pre10 9,386 5/3/2019
4.0.0.346134-pre9 15,761 4/18/2019
4.0.0.304370-pre8 10,991 4/3/2019
4.0.0.250467-pre7 7,609 3/20/2019
4.0.0.232914-pre6 8,437 3/14/2019
4.0.0.169046-pre5 6,009 2/21/2019
4.0.0.135214-pre4 4,730 2/6/2019
4.0.0.94569-pre3 4,339 1/24/2019
4.0.0.62955-pre2 13,542 1/10/2019
4.0.0.8055-pre1 13,831 12/4/2018
3.6.0.709228 6,816 8/21/2019
3.6.0.539721 23,087 6/27/2019
3.6.0.344457 171,358 4/18/2019
3.6.0.293080 95,967 4/3/2019
3.6.0.264807 165,070 3/19/2019
3.6.0.220655 108,341 3/6/2019
3.6.0.169048-pre2 550 2/21/2019
3.6.0.135200-pre1 4,963 2/6/2019
3.5.0.274416 16,475 3/26/2019
3.5.0.169047 92,429 2/20/2019
3.5.0.129452 136,965 2/6/2019
3.5.0.94564-pre3 1,129 1/24/2019
3.5.0.62956-pre2 1,056 1/10/2019
3.4.0.1039999 13,208 3/26/2019
3.4.0.1029999 91,051 1/24/2019
3.4.0.1009999 107,888 1/4/2019
3.4.0.1008975 464,043 11/15/2018
3.4.0.987044-pre2 2,376 11/8/2018
3.4.0.925479-pre1 11,154 10/18/2018
3.3.0.967583 169,942 11/1/2018
3.3.0.912540 124,581 10/18/2018
3.3.0.893527-pre3 8,017 10/11/2018
3.3.0.871608-pre2 12,268 10/1/2018
3.3.0.840541-pre1 6,277 9/20/2018
3.2.0.871581 117,028 10/3/2018
3.2.0.839982 165,296 9/17/2018
3.2.0.809874-pre3 3,856 9/10/2018
3.2.0.729530-pre2 13,154 8/14/2018
3.2.0.637442-pre1 10,931 7/17/2018
3.1.0.697729 359,699 8/1/2018
3.1.0.637273 109,175 7/11/2018
3.1.0.583944 150,241 6/20/2018
3.1.0.561732-pre4 6,433 6/11/2018
3.1.0.550168-pre3 3,118 6/6/2018
3.1.0.530888-pre2 1,942 6/4/2018
3.1.0.469394-pre1 11,514 5/9/2018
3.0.0.561731 147,291 6/11/2018
3.0.0.550146 28,249 6/6/2018
3.0.0.530893 21,778 6/4/2018
3.0.0.482510 253,665 5/14/2018
3.0.0.446417 137,319 5/1/2018
3.0.0.427558-pre4 9,377 4/25/2018
3.0.0.354232-pre3 14,303 4/5/2018
3.0.0.296286-pre2 8,438 3/20/2018
2.5.1.527436 93,966 5/4/2018
2.5.1.444934 173,225 4/4/2018
2.5.1.392594-pre3 4,307 3/21/2018
2.5.1.340284-pre2 6,542 3/9/2018
2.5.1.317207-pre1 5,809 3/1/2018
2.5.0.280555 328,786 2/16/2018
2.5.0.122203 340,430 12/18/2017
2.5.0.121934 222,273 11/28/2017
2.5.0.91635 166,073 11/16/2017
2.5.0.77107 30,922 11/13/2017
2.5.0.75255-pre3 5,573 11/10/2017
2.5.0.19271-pre2 9,576 10/20/2017
2.4.0.91020 50,075 11/16/2017
2.4.0.74863 35,267 11/10/2017
2.4.0.38779 62,159 10/30/2017
2.4.0.18342 56,268 10/20/2017
2.4.0.282 164,802 9/29/2017
2.4.0.280 206,665 9/27/2017
2.4.0.275-pre3 8,257 9/19/2017
2.4.0.269-pre2 13,872 8/29/2017
2.4.0.266-pre1 20,077 8/16/2017
2.3.5.256-pre6 36,269 6/29/2017
2.3.5.255-pre5 5,050 6/26/2017
2.3.5.239-pre3 28,331 5/11/2017
2.3.5.235-pre2 11,451 4/26/2017
2.3.5.233-pre1 9,319 4/13/2017
2.3.4.270 154,217 8/29/2017
2.3.4.267 68,819 8/16/2017
2.3.4.247 426,313 5/16/2017
2.3.4.231 214,168 4/12/2017
2.3.4.224 252,063 3/29/2017
2.3.4.221-pre6 7,584 3/27/2017
2.3.4.214-pre5 10,478 3/14/2017
2.3.4.212-pre4 6,407 3/10/2017
2.3.4.211-pre3 4,316 3/9/2017
2.3.4.192-pre2 19,619 2/3/2017
2.3.4.184-pre1 13,173 1/13/2017
2.3.3.193 249,240 2/1/2017
2.3.3.180 212,320 1/5/2017
2.3.3.175 118,808 12/6/2016
2.3.3.168 67,253 11/23/2016
2.3.3.166-pre4 8,227 11/3/2016
2.3.3.163-pre3 6,551 10/17/2016
2.3.3.152-pre2 16,276 9/15/2016
2.3.2.127 292,608 9/14/2016
2.3.2.118-pre1 6,967 8/3/2016
2.3.1.114 157,006 8/3/2016
2.3.1.113-pre3 3,971 7/19/2016
2.3.1.111-pre2 4,907 7/4/2016
2.3.1.110-pre1 2,623 6/29/2016
2.3.0.107 208,004 6/29/2016
2.3.0.49 89,140 6/16/2016
2.3.0.46-pre3 16,317 5/30/2016
2.3.0.38-pre2 13,376 4/27/2016
2.3.0.34-pre1 8,948 4/27/2016
2.2.0.45 139,231 5/30/2016
2.2.0.31 128,607 4/27/2016
2.2.0.23-pre4 3,247 4/20/2016
2.2.0.18-pre3 2,461 4/20/2016
2.2.0.5-pre2 16,156 4/8/2016
2.2.0.4-pre1 18,666 4/5/2016
2.1.0.6529 99,135 3/13/2016
2.1.0.6526 17,766 3/9/2016
2.1.0.6524 36,868 3/2/2016
2.1.0.6521 12,298 3/1/2016
2.1.0.6517-pre5 2,338 2/18/2016
2.1.0.6513-pre4 2,320 2/9/2016
2.1.0.6508-pre3 2,636 1/28/2016
2.1.0.6503-pre2 7,222 1/22/2016
2.1.0.6501-pre1 1,776 1/21/2016
2.1.0.6500-pre1 1,601 1/20/2016
2.0.1.6505 93,940 1/28/2016
2.0.1.6495 75,449 1/20/2016
2.0.1.6492-pre1 4,058 12/3/2015
2.0.0.6490 98,668 12/1/2015
2.0.0.6484 18,022 11/21/2015
2.0.0.6482 242,750 11/17/2015
1.5.2.6478-pre3 1,480 11/17/2015
1.5.2.6477-pre2 4,121 11/10/2015
1.5.2.6469-pre1 2,404 10/20/2015
1.5.1.6471 77,344 10/20/2015
1.5.1.6468 4,130 10/20/2015
1.5.1.6460-pre2 1,873 10/13/2015
1.5.1.6455-pre1 3,232 10/2/2015
1.5.0.6447 56,308 9/25/2015
1.5.0.6446 21,995 9/16/2015
1.5.0.6404-pre3 3,522 8/25/2015
1.5.0.6401-pre2 1,724 8/21/2015
1.5.0.6396-pre1 2,161 8/5/2015
1.4.4.6449 2,971 9/25/2015
1.4.4.6443 1,869 9/16/2015
1.4.4.6392 77,777 7/29/2015
1.4.4.6391 2,217 7/28/2015
1.4.4.6387 3,154 7/27/2015
1.4.4.6379-pre3 1,743 7/20/2015
1.4.4.6378-pre2 1,565 7/16/2015
1.4.4.6377-pre1 1,571 7/14/2015
1.4.3.6376 43,035 7/9/2015
1.4.3.6374 16,878 7/1/2015
1.4.3.6372 2,296 6/30/2015
1.4.3.6364-pre3 2,543 6/16/2015
1.4.3.6358-pre2 5,984 4/24/2015
1.4.3.6356-pre1 1,655 4/21/2015
1.4.2.6359 63,479 4/30/2015
1.4.2.6355 14,676 4/21/2015
1.4.2.6353-pre2 2,708 3/31/2015
1.4.2.6350-pre1 1,760 3/30/2015
1.4.1.6349 44,865 3/30/2015
1.4.1.6347-pre2 3,442 3/19/2015
1.4.1.6342-pre1 1,897 3/10/2015
1.4.0.6341 29,294 3/9/2015
1.4.0.6340-pre2 2,745 3/6/2015
1.4.0.6336-pre1 1,728 3/3/2015
1.3.5.6337 5,330 3/5/2015
1.3.5.6335 25,625 3/2/2015
1.3.5.6333-pre1 2,305 2/17/2015
1.3.4.6332 19,537 2/17/2015
1.3.4.6331-pre4 1,761 2/13/2015
1.3.4.6329-pre3 1,487 2/12/2015
1.3.4.6328-pre2 1,495 2/11/2015
1.3.4.6325-pre1 1,458 2/9/2015
1.3.3.6323 53,579 2/9/2015
1.3.3.6322-pre3 1,457 2/6/2015
1.3.3.6321-pre2 1,619 2/4/2015
1.3.3.6318-pre1 1,615 2/2/2015
1.3.2.6316 7,978 2/3/2015
1.3.2.6313-pre3 1,604 1/30/2015
1.3.2.6309-pre2 1,652 1/28/2015
1.3.2.6299-pre1 2,362 1/20/2015
1.3.1.6296 57,500 1/4/2015
1.3.1.6294-pre1 4,690 12/24/2014
1.3.0.6292 9,840 12/24/2014
1.3.0.6286-pre4 2,361 12/19/2014
1.3.0.6284-pre3 1,861 12/12/2014
1.3.0.6280-pre2 1,817 12/9/2014
1.3.0.6275-pre1 8,091 11/12/2014
1.2.3.6257 39,491 10/2/2014
1.2.3.6256-pre4 2,499 9/26/2014
1.2.3.6255-pre3 2,908 9/20/2014
1.2.3.6249-pre2 2,086 9/9/2014
1.2.3.6246-pre1 4,660 8/15/2014
1.2.2.6243 29,041 7/30/2014
1.2.2.6241-pre3 3,019 7/28/2014
1.2.2.6240-pre2 4,855 7/22/2014
1.2.2.6238-pre1 4,018 7/17/2014
1.2.1.6229 8,825 7/14/2014
1.1.1.6206 14,468 6/19/2014
1.1.0.6201 13,896 6/12/2014
1.0.6197 4,449 6/4/2014
1.0.6188 12,040 5/28/2014
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