Xamarin.Forms.Maps 1.5.2.6469-pre1

Maps models and renderers for Xamarin.Forms

This is a prerelease version of Xamarin.Forms.Maps.
There is a newer version of this package available.
See the version list below for details.
Install-Package Xamarin.Forms.Maps -Version 1.5.2.6469-pre1
dotnet add package Xamarin.Forms.Maps --version 1.5.2.6469-pre1
<PackageReference Include="Xamarin.Forms.Maps" Version="1.5.2.6469-pre1" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add Xamarin.Forms.Maps --version 1.5.2.6469-pre1
The NuGet Team does not provide support for this client. Please contact its maintainers for support.

Release Notes

## Important Notes ##

This release is more alpha than most pre-releases. We want to get as much testing on the new optimization work as possible. Expect to see changes and more work landing into this release before promotion to stable.

## Enhancements ##

### New properties ###

These all do pretty much what you expect

- Editor.TextColor
- Entry.TextColor
- Editor.FontSize
- Editor.FontAttributes
- Editor.FontFamily

### New API ###

```csharp
public enum ListViewCachingStrategy
{
RetainElement = 0,
RecycleElement,
}
```

This new `enum` is used in conjuction with a new constructor for ListView, `ListView (ListViewCachingStrategy cachingStrategy)`. The default mode, RetainElement represents the old ListView behavior. It is also the default behavior if the old constructor is retained. The new behavior has the following characteristics.

- Only works on Android/iOS. Windows will simply get the old behavior no matter what.
- DataTemplate will be inflated to match as many native renderers for the cells are created.
- During virtualization, the Cell will have its binding context updated.

This means if an App opt into the new mode, the app must appropriately handle BindingContext updates. All data about the cell must come from the binding context or consistency errors may occur. If the cells are using custom renderers, it must ensure they properly implement property change notification. This mode is not always a pure performance win, testing is the only way to know for sure, however there are some basic guidelines:

 - Use RecycleElement if:
   - Cell BindingContext defines all properties/data about the View
   - Cells are largely similar and do not morphe dramatically based on BindingContext
   - The Cell has a moderate to small number of bindings
   - The Cell adheres well to the new performance guidelines below
 - Use RetainElement if:
   - Cells morph frequently
   - Cells have large numbers of bindings (20 to 30 tends to be the crossover point)
   - When testing RecycleElement, it is slower

Generally speaking, prefer RecycleElement as it can offer significant performance gains when in the fast path scenario. Eventually RetainElement may be phased out, however this will only happen once RetainElement no longer offers any performance advantage in any scenario.

### Layout Optimization ###

There is a new experimental layout optimization in this release of Xamarin.Forms. The optimization is complex and currently only impacts layout updates. Effectively the optimization serves to block InvalidateMeasure call chains. To get the best possible performance follow these performance guidelines:

- Leave the View.VerticalOptions and View.HorizontalOptions alone as much as possible. The default value of Fill or FillAndExpand allows for the best layout optimization.
- When using a StackLayout, make sure to have only one child set to Expand.
- Avoid RelativeLayout when possible.
- When using Grid, avoid Auto rows/columns if possible. Fixed row/cols are best. Stars are equally good if parent tree follows guidelines.
- When using AbsoluteLayout, avoid using AutoSize if possible.
- When using Labels, set the LineBreakMode to NoWrap whenever possible.

This optimization may impact the layout of your app. If you experience any differences at all, please report them as bugs. Further the optimization will work with the new ListView caching strategy, effectively doubling down on scrolling performance.

## Bug Fixes ##

[Bug 34632](https://bugzilla.xamarin.com/show_bug.cgi?id=34632) - Can't change IsPresented when setting SplitOnLandscape
[Bug 34556](https://bugzilla.xamarin.com/show_bug.cgi?id=34556) - Minimum version determination methods on iOS will fail once iOS hits version 10
[Bug 34549](https://bugzilla.xamarin.com/show_bug.cgi?id=34549) - Setting a BindableProperty of Type DateTime? to null raises Error
[Bug 34235](https://bugzilla.xamarin.com/show_bug.cgi?id=34235) - Xamarin.Forms.Platform.WinRT.TabbedPageRenderer OnElementChanged not virtual
[Bug 34061](https://bugzilla.xamarin.com/show_bug.cgi?id=34061) - RelativeLayout - First child added after page display does not appear
[Bug 34007](https://bugzilla.xamarin.com/show_bug.cgi?id=34007) - Z order drawing of children views are different on Android and iOS
[Bug 33764](https://bugzilla.xamarin.com/show_bug.cgi?id=33764) - Frame outline colour doesn't change using ViewModel
[Bug 33612](https://bugzilla.xamarin.com/show_bug.cgi?id=33612) - Removing a page from the navigation stack causes an 'Object reference' exception in Android only
[Bug 33499](https://bugzilla.xamarin.com/show_bug.cgi?id=33499) - Android WebViewRenderer doesn't unhook events properly
[Bug 32902](https://bugzilla.xamarin.com/show_bug.cgi?id=32902) - [iOS | iPad] App Crashes (without debug log) when Master Detail isPresented and navigation being popped
[Bug 32801](https://bugzilla.xamarin.com/show_bug.cgi?id=32801) - Memory Leak in TabbedPage + NavigationPage
[Bug 32447](https://bugzilla.xamarin.com/show_bug.cgi?id=32447) - [iOS] App crash when scrolling quickly through a TableView that has Pickers in the cells.
[Bug 32040](https://bugzilla.xamarin.com/show_bug.cgi?id=32040) - EntryCell.Tapped or SwitchCell.Tapped does not fire when within a TableView
[Bug 31366](https://bugzilla.xamarin.com/show_bug.cgi?id=31366) - Pushing and then popping a page modally cause ArgumentOutOfRangeException
[Bug 29257](https://bugzilla.xamarin.com/show_bug.cgi?id=29257) - CarouselPage.CurrentPage Does Not Work Properly When Used Inside a NavigationPage

## Other Fixes ##

- [A] Non-AppCompat backend no longer fails to redraw Frame correctly
- OnPlatform now passing the Windows value to WinRT projects. This API is being considered for replacement with something more extensible.
- OpenGLView now uses IOpenGLViewController for backend communication

Version History

Version Downloads Last updated
4.1.0.496342-pre2 226 6/13/2019
4.1.0.483098-pre1 334 6/5/2019
4.0.0.497661 2,624 6/13/2019
4.0.0.482894 3,179 6/3/2019
4.0.0.425677 6,872 5/14/2019
4.0.0.394984-pre10 609 5/3/2019
4.0.0.346134-pre9 756 4/18/2019
4.0.0.304370-pre8 606 4/3/2019
4.0.0.250467-pre7 511 3/20/2019
4.0.0.232914-pre6 350 3/14/2019
4.0.0.169046-pre5 755 2/21/2019
4.0.0.135214-pre4 497 2/6/2019
4.0.0.94569-pre3 520 1/24/2019
4.0.0.62955-pre2 553 1/10/2019
4.0.0.8055-pre1 1,355 12/4/2018
3.6.0.344457 17,900 4/18/2019
3.6.0.293080 9,039 4/3/2019
3.6.0.264807 6,994 3/19/2019
3.6.0.220655 11,502 3/6/2019
3.6.0.169048-pre2 244 2/21/2019
3.6.0.135200-pre1 251 2/6/2019
3.5.0.274416 847 3/26/2019
3.5.0.169047 6,576 2/20/2019
3.5.0.129452 7,757 2/6/2019
3.5.0.94564-pre3 282 1/24/2019
3.5.0.62956-pre2 334 1/10/2019
3.4.0.1039999 738 3/26/2019
3.4.0.1029999 7,225 1/24/2019
3.4.0.1009999 13,527 1/4/2019
3.4.0.1008975 34,080 11/15/2018
3.4.0.987044-pre2 544 11/8/2018
3.4.0.925479-pre1 1,179 10/18/2018
3.3.0.967583 9,655 11/1/2018
3.3.0.912540 10,217 10/18/2018
3.3.0.893527-pre3 674 10/11/2018
3.3.0.871608-pre2 854 10/1/2018
3.3.0.840541-pre1 959 9/20/2018
3.2.0.871581 16,875 10/3/2018
3.2.0.839982 15,815 9/17/2018
3.2.0.809874-pre3 838 9/10/2018
3.2.0.729530-pre2 1,283 8/14/2018
3.2.0.637442-pre1 1,951 7/17/2018
3.1.0.697729 22,953 8/1/2018
3.1.0.637273 12,354 7/11/2018
3.1.0.583944 17,723 6/20/2018
3.1.0.561732-pre4 895 6/11/2018
3.1.0.550168-pre3 791 6/6/2018
3.1.0.530888-pre2 817 6/4/2018
3.1.0.469394-pre1 1,425 5/9/2018
3.0.0.561731 6,626 6/11/2018
3.0.0.550146 3,207 6/6/2018
3.0.0.530893 2,427 6/4/2018
3.0.0.482510 12,536 5/14/2018
3.0.0.446417 5,971 5/1/2018
3.0.0.427558-pre4 1,228 4/25/2018
3.0.0.354232-pre3 1,220 4/5/2018
3.0.0.296286-pre2 1,250 3/20/2018
2.5.1.527436 8,258 5/4/2018
2.5.1.444934 14,913 4/4/2018
2.5.1.392594-pre3 728 3/21/2018
2.5.1.340284-pre2 1,009 3/9/2018
2.5.1.317207-pre1 1,016 3/1/2018
2.5.0.280555 35,400 2/16/2018
2.5.0.122203 21,893 12/18/2017
2.5.0.121934 20,867 11/28/2017
2.5.0.91635 10,294 11/16/2017
2.5.0.77107 3,355 11/13/2017
2.5.0.75255-pre3 837 11/10/2017
2.5.0.19271-pre2 1,201 10/20/2017
2.4.0.91020 5,136 11/16/2017
2.4.0.74863 4,543 11/10/2017
2.4.0.38779 9,617 10/30/2017
2.4.0.18342 6,626 10/20/2017
2.4.0.282 28,008 9/29/2017
2.4.0.280 3,681 9/27/2017
2.4.0.275-pre3 1,251 9/19/2017
2.4.0.269-pre2 2,291 8/29/2017
2.4.0.266-pre1 2,112 8/16/2017
2.3.5.256-pre6 3,226 6/29/2017
2.3.5.255-pre5 2,484 6/26/2017
2.3.5.239-pre3 3,102 5/11/2017
2.3.5.235-pre2 1,685 4/26/2017
2.3.5.233-pre1 1,255 4/13/2017
2.3.4.270 18,756 8/29/2017
2.3.4.267 10,648 8/16/2017
2.3.4.247 44,619 5/16/2017
2.3.4.231 38,077 4/12/2017
2.3.4.224 14,743 3/29/2017
2.3.4.221-pre6 2,139 3/27/2017
2.3.4.214-pre5 2,384 3/14/2017
2.3.4.212-pre4 1,064 3/10/2017
2.3.4.211-pre3 998 3/9/2017
2.3.4.192-pre2 3,375 2/3/2017
2.3.4.184-pre1 2,195 1/13/2017
2.3.3.193 27,401 2/1/2017
2.3.3.180 33,308 1/5/2017
2.3.3.175 9,709 12/6/2016
2.3.3.168 8,241 11/23/2016
2.3.3.166-pre4 1,442 11/3/2016
2.3.3.165-pre4 920 10/27/2016
2.3.3.163-pre3 1,327 10/17/2016
2.3.3.152-pre2 8,432 9/15/2016
2.3.2.127 48,224 9/14/2016
2.3.2.118-pre1 1,778 8/3/2016
2.3.1.114 17,238 8/3/2016
2.3.1.113-pre3 1,165 7/19/2016
2.3.1.111-pre2 1,139 7/4/2016
2.3.1.110-pre1 914 6/29/2016
2.3.0.107 37,660 6/29/2016
2.3.0.49 13,879 6/16/2016
2.3.0.48-pre3 944 6/16/2016
2.3.0.46-pre3 1,613 5/30/2016
2.3.0.38-pre2 1,894 4/27/2016
2.3.0.34-pre1 4,531 4/27/2016
2.2.0.45 12,099 5/30/2016
2.2.0.31 34,850 4/27/2016
2.2.0.23-pre4 1,155 4/20/2016
2.2.0.18-pre3 964 4/20/2016
2.2.0.16-pre3 1,185 4/20/2016
2.2.0.5-pre2 2,393 4/8/2016
2.2.0.4-pre1 4,443 4/5/2016
2.1.0.6529 11,498 3/13/2016
2.1.0.6526 5,421 3/9/2016
2.1.0.6524 4,147 3/2/2016
2.1.0.6521 1,418 3/1/2016
2.1.0.6517-pre5 1,146 2/18/2016
2.1.0.6513-pre4 1,120 2/9/2016
2.1.0.6508-pre3 1,282 1/28/2016
2.1.0.6503-pre2 1,852 1/22/2016
2.1.0.6501-pre1 892 1/21/2016
2.1.0.6500-pre1 1,024 1/20/2016
2.0.1.6505 18,869 1/28/2016
2.0.1.6495 5,976 1/20/2016
2.0.1.6492-pre1 1,235 12/3/2015
2.0.0.6490 10,180 12/1/2015
2.0.0.6484 2,577 11/21/2015
2.0.0.6482 3,844 11/17/2015
1.5.2.6478-pre3 864 11/17/2015
1.5.2.6477-pre2 1,273 11/10/2015
1.5.2.6469-pre1 1,210 10/20/2015
1.5.1.6471 11,434 10/20/2015
1.5.1.6468 1,370 10/20/2015
1.5.1.6460-pre2 950 10/13/2015
1.5.1.6455-pre1 2,161 10/2/2015
1.5.0.6447 9,540 9/25/2015
1.5.0.6446 4,364 9/16/2015
1.5.0.6404-pre3 1,293 8/25/2015
1.5.0.6401-pre2 1,077 8/21/2015
1.5.0.6396-pre1 1,027 8/5/2015
1.4.4.6449 1,290 9/25/2015
1.4.4.6443 1,134 9/16/2015
1.4.4.6392 10,587 7/29/2015
1.4.4.6391 1,077 7/28/2015
1.4.4.6387 1,269 7/27/2015
1.4.4.6379-pre3 1,051 7/20/2015
1.4.4.6378-pre2 980 7/16/2015
1.4.4.6377-pre1 1,042 7/14/2015
1.4.3.6376 4,483 7/9/2015
1.4.3.6374 3,322 7/1/2015
1.4.3.6372 1,122 6/30/2015
1.4.3.6364-pre3 997 6/16/2015
1.4.3.6358-pre2 1,159 4/24/2015
1.4.3.6356-pre1 1,033 4/21/2015
1.4.2.6359 10,121 4/30/2015
1.4.2.6355 2,868 4/21/2015
1.4.2.6353-pre2 1,025 3/31/2015
1.4.2.6350-pre1 915 3/30/2015
1.4.1.6349 9,526 3/30/2015
1.4.1.6347-pre2 1,210 3/19/2015
1.4.1.6342-pre1 1,129 3/10/2015
1.4.0.6341 3,554 3/9/2015
1.4.0.6340-pre2 928 3/6/2015
1.4.0.6336-pre1 964 3/3/2015
1.3.5.6337 1,456 3/5/2015
1.3.5.6335 1,393 3/2/2015
1.3.5.6333-pre1 1,014 2/17/2015
1.3.4.6332 2,103 2/17/2015
1.3.4.6331-pre4 1,037 2/13/2015
1.3.4.6329-pre3 943 2/12/2015
1.3.4.6328-pre2 914 2/11/2015
1.3.4.6325-pre1 938 2/9/2015
1.3.3.6323 1,832 2/9/2015
1.3.3.6322-pre3 988 2/6/2015
1.3.3.6321-pre2 986 2/4/2015
1.3.3.6318-pre1 943 2/2/2015
1.3.2.6316 1,635 2/3/2015
1.3.2.6313-pre3 965 1/30/2015
1.3.2.6309-pre2 986 1/28/2015
1.3.2.6299-pre1 1,079 1/20/2015
1.3.1.6296 4,935 1/4/2015
1.3.1.6294-pre1 1,108 12/24/2014
1.3.0.6292 1,845 12/24/2014
1.3.0.6286-pre4 982 12/19/2014
1.3.0.6284-pre3 1,037 12/12/2014
1.3.0.6280-pre2 998 12/9/2014
1.3.0.6275-pre1 2,600 11/12/2014
1.2.3.6257 8,270 10/2/2014
1.2.3.6256-pre4 985 9/26/2014
1.2.3.6255-pre3 1,586 9/20/2014
1.2.3.6249-pre2 1,024 9/9/2014
1.2.3.6246-pre1 1,019 8/15/2014
1.2.2.6243 3,886 7/30/2014
1.2.2.6241-pre3 933 7/28/2014
1.2.2.6240-pre2 1,301 7/22/2014
1.2.2.6238-pre1 924 7/17/2014
1.2.1.6229 2,814 7/14/2014
1.1.1.6206 6,937 6/19/2014
1.1.0.6201 2,003 6/12/2014
1.0.6197 1,388 6/4/2014
1.0.6188 3,485 5/28/2014
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