Xamarin.Forms 1.4.0.6341

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There is a newer version of this package available.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 1.4.0.6341
dotnet add package Xamarin.Forms --version 1.4.0.6341
<PackageReference Include="Xamarin.Forms" Version="1.4.0.6341" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Xamarin.Forms --version 1.4.0.6341
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

## Important Notes ##

This is a feature release. As such unlike a patch version bump, the minor version bump indicates the inclusion of new APIs.

## New API ##

### ScrollView ###

It is now possible to detect the current scroll offset of the ScrollView. These are readonly bindable properties.
```csharp
public double ScrollX { get; }
public double ScrollY { get; }
```

There are also methods which can be used to perform scrolling in the ScrollView.
```csharp
public Task ScrollToAsync (double x, double y, bool animated);
public Task ScrollToAsync (Element element, bool animated);
```
The `Element` passed to `ScrollToAsync` must be a descendant of the `ScrollView` but does not have to be a direct child.

Finally for those who do not wish to use bindings to observe scrolling, there is a `Scrolled` event that fires when `ScrollX` or `ScrollY` are updated.
```csharp
public event EventHandler<ScrolledEventArgs> Scrolled;

public class ScrolledEventArgs : EventArgs
{
   public double ScrollX { get; } = 0;
   public double ScrollY { get; } = 0;
}
```
Lastly ScrollView no longer uses any internal API to communicate between the frontend and the renderer. `IScrollViewController`, which is implemented explicitly on ScrollView can be used to trigger these and other events.

### ListView ###

**Separator Enhancements**
It is now possible to enable/disable separators for the ListView. This can be configured via the `SeparatorVisibility` property, which is bindable.
```csharp
public SeparatorVisibility SeparatorVisibility { get; set; } = SeparatorVisibility.Default;

public enum SeparatorVisibility {
   Default = 0,
   None = 1,
}
```
Currently there is no option for `Always` as not all platforms have separators as part of their UX. We are considering adding this in the future, however it would be an invented paradigm for Windows platforms.

It is now possible to apply a `Color` to the separator in ListView.
```csharp
public Color SeparatorColor { get; set; } = Color.Default;
```
The default value is `Color.Default` and will function unchanged from the 1.3.0 implementation if left untouched. RGBA values are supported. This function does nothing in `SeparatorVisibility` is set to `None`. Please note that setting either of these properties on Android after loading the `ListView` incurs a large performance penalty.

**Header/Footer**
`ListView` has also grown both a Header and a Footer. These are managed through a series of properties which enable everything from simple usage to more complex MVVM style usage. With Header/Footer the primary reason developers have in the past been forced to put ListViews inside of ScrollViews is finally dead! If you are still placing a ListView inside a ScrollView we strongly suggest you consider porting.
```csharp
public object Header { get; set; } = null;
public DataTemplate HeaderTemplate { get; set; } = null;
public object Footer { get; set; } = null;
public DataTemplate FooterTemplate { get; set; } = null;
```
It is important to note that Header or Footer may be set directly to a View and the Template properties left null. This will cause the Header/Footer to be directly consumed by the renderer. All of these properties are bindable.

**Pull To Refresh**
PullToRefresh has been enabled on all current target platforms for ListView. To enable PullToRefresh in your app simple set `IsPullToRefreshEnabled` to true and make sure you respond to the correct events. It is important to note that this is the "easy" version of this API, in the future a more complete API with a standalone View may be added.
```csharp
public event EventHandler Refreshing;

public bool IsPullToRefreshEnabled { get; set; } = false;
public bool IsRefreshing { get; set; } = false;
public ICommand RefreshCommand { get; set; } = null;

public void BeginRefresh ();
public void EndRefresh ();
```
When the user triggers a `PullToRefresh` the Command will be invoked and the `Refreshed` event emitted. `IsRefreshing` will be set to true. The `ICommand.CanExecute` property is respected. The user must either call `EndRefresh` or assign `IsRefreshing` to false in order to end the refresh state.

All control parameters for these features and more are exposed through the IListViewController interface, which is explicitly implemented on ListView. This will assist those wishing to modify how these features work in custom renderers.

The Windows Phone implementation of PullToRefresh is a custom implementation as there is no platform idiom for doing this. In the future if the Windows platform decided to add a method of doing PullToRefresh by default, we intend to port.

### Forms.Application ###

The `Application` class now exposes 4 new events for dealing with Modal navigation.
```csharp
public event EventHandler<ModalPushedEventArgs> ModalPushed;
public event EventHandler<ModalPoppedEventArgs> ModalPopped;
public event EventHandler<ModalPushingEventArgs> ModalPushing;
public event EventHandler<ModalPoppingEventArgs> ModalPopping;
```
The `ModalPoppingEventArgs` contains a `Cancel` property which if set to true will cancel the Pop event and cause the application to enter the background (the operating system is informed of the unhandled back event).

In order to implement this feature, all pre-Application methods of creating a Forms app have been updated to create a default `Application` which is set as the root pages `Parent`. It is possible this may cause issues in some edge cases, if you have any issues please file a bug report. It is suggested you update your app to the new LoadApplication initialization methodology if possible.

Application now has a method of manually forcing the `Properties` dictionary to be saved to the IsolatedFileStore. This is to allow users to save their properties when it makes sense for them rather than risk them not getting serialized out due to a crash/being killed by the OS.
```csharp
public Task SavePropertiesAsync ()
```

### OpenGLRenderer ###

On Android `OpenGLRenderer` has been renamed `OpenGLViewRenderer` for consistency.

### Layout ###
Layout now contains a `ILayoutController` class which has an `IReadOnlyList<Element>` which can be used to enumerate the children of a Layout regardless of the type of the Layout.

## Other Features ##

- WebView now correctly supports javascript out of the box on Windows Phone 8.0

## Bug Fixes ##

- [Bug 27063](https://bugzilla.xamarin.com/show_bug.cgi?id=27063) - Navigation not always returning to the proper page.
- [Bug 27225](https://bugzilla.xamarin.com/show_bug.cgi?id=27225) - Secondary ToolbarItems cause app to hang during PushAsync
- [Bug 27437](https://bugzilla.xamarin.com/show_bug.cgi?id=27437) - [iOS] Context menu error after deleting an item from a ListView using ContextActions
- [Bug 27096](https://bugzilla.xamarin.com/show_bug.cgi?id=27096) - EntryCell has different fontsize on Android
- [Bug 21317](https://bugzilla.xamarin.com/show_bug.cgi?id=21317) - Stepper control .IsEnabled doesn't work on Android
- [Bug 26338](https://bugzilla.xamarin.com/show_bug.cgi?id=26338) - Unable to change page BackgroundImage from code
- [Bug 26588](https://bugzilla.xamarin.com/show_bug.cgi?id=26588) - [WinPhone] Entry does not trigger numeric keyboard when password masking is enabled
- [Bug 27072](https://bugzilla.xamarin.com/show_bug.cgi?id=27072) - Listview Context Actions not removed if a different item is tapped in Android

## Other Fixes ##

- Stepper default values now can be correctly inherited through a style.
- x:Static now correctly reports position on error in XAML.
- XAML now throws a more user friendly error on duplicate x:Name
- XAML will now use implicit operators when assigning values to properties
- XAML now supports baseclass indication for collection properties
- XAML string literals are now supported with `{}foo`
- iOS6 Modal pages should no longer sometimes have a 20px offset for no reason

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Repository Stars
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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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