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There is a newer version of this package available.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

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

Repository Stars
xamarin/xamarin-forms-samples
Sample apps built using the Xamarin.Forms framework
xamarinhq/app-conference
Pre-build conference application built with Xamarin
xamarin/xamarin-forms-book-samples
Code samples for "Creating Mobile Apps with Xamarin.Forms"
microsoft/SmartHotel360-Mobile
SmartHotel360 Mobile
conceptdev/xamarin-forms-samples
Samples that use Xamarin.Forms (http://xamarin.com/forms)
microsoft/appcenter
Central repository for App Center open source resources and planning.
xamarin/app-crm
xamarinhq/app-acquaint
A Xamarin demo app featuring both Xamarin.Forms and native approaches to Xamarin development
xamarinhq/app-myshoppe
Cross-platform Xamarin.Forms sample for managing stores.
chrfalch/NControl
Simple Xamarin.Forms wrapper control around the NGraphics library

Version History

Version Downloads Last updated
4.3.0.851321-pre3 365 10/2/2019
4.3.0.819712-pre2 277 9/19/2019
4.3.0.778476-pre1 228 9/11/2019
4.2.0.848062 3,938 10/2/2019
4.2.0.815419 5,016 9/19/2019
4.2.0.778463 4,354 9/11/2019
4.2.0.709249 16,739 8/21/2019
4.2.0.673161-pre3 381 8/7/2019
4.2.0.618605-pre2 302 7/24/2019
4.2.0.608146-pre1 236 7/16/2019
4.1.0.778454 723 9/11/2019
4.1.0.709244 2,672 8/21/2019
4.1.0.673156 8,991 8/7/2019
4.1.0.618606 10,734 7/24/2019
4.1.0.581479 11,430 7/9/2019
4.1.0.555618 9,212 6/28/2019
4.1.0.496342-pre2 524 6/13/2019
4.1.0.483098-pre1 701 6/5/2019
4.0.0.709238 229 8/21/2019
4.0.0.618610 798 7/24/2019
4.0.0.540366 4,542 6/27/2019
4.0.0.497661 9,214 6/13/2019
4.0.0.482894 4,603 6/3/2019
4.0.0.425677 17,679 5/14/2019
4.0.0.394984-pre10 673 5/3/2019
4.0.0.346134-pre9 956 4/18/2019
4.0.0.304370-pre8 823 4/3/2019
4.0.0.250467-pre7 599 3/20/2019
4.0.0.232914-pre6 420 3/14/2019
4.0.0.169046-pre5 809 2/21/2019
4.0.0.135214-pre4 532 2/6/2019
4.0.0.94569-pre3 571 1/24/2019
4.0.0.62955-pre2 612 1/10/2019
4.0.0.8055-pre1 1,408 12/4/2018
3.6.0.709228 740 8/21/2019
3.6.0.539721 2,106 6/27/2019
3.6.0.344457 29,584 4/18/2019
3.6.0.293080 13,750 4/3/2019
3.6.0.264807 9,418 3/19/2019
3.6.0.220655 13,732 3/6/2019
3.6.0.169048-pre2 280 2/21/2019
3.6.0.135200-pre1 292 2/6/2019
3.5.0.274416 2,162 3/26/2019
3.5.0.169047 7,936 2/20/2019
3.5.0.129452 10,830 2/6/2019
3.5.0.94564-pre3 318 1/24/2019
3.5.0.62956-pre2 389 1/10/2019
3.4.0.1039999 1,279 3/26/2019
3.4.0.1029999 8,708 1/24/2019
3.4.0.1009999 18,582 1/4/2019
3.4.0.1008975 42,743 11/15/2018
3.4.0.987044-pre2 591 11/8/2018
3.4.0.925479-pre1 1,316 10/18/2018
3.3.0.967583 13,652 11/1/2018
3.3.0.912540 12,937 10/18/2018
3.3.0.893527-pre3 724 10/11/2018
3.3.0.871608-pre2 1,152 10/1/2018
3.3.0.840541-pre1 1,253 9/20/2018
3.2.0.871581 20,044 10/3/2018
3.2.0.839982 20,247 9/17/2018
3.2.0.809874-pre3 888 9/10/2018
3.2.0.729530-pre2 1,432 8/14/2018
3.2.0.637442-pre1 2,252 7/17/2018
3.1.0.697729 24,638 8/1/2018
3.1.0.637273 16,534 7/11/2018
3.1.0.583944 20,398 6/20/2018
3.1.0.561732-pre4 957 6/11/2018
3.1.0.550168-pre3 850 6/6/2018
3.1.0.530888-pre2 877 6/4/2018
3.1.0.469394-pre1 1,495 5/9/2018
3.0.0.561731 7,610 6/11/2018
3.0.0.550146 3,528 6/6/2018
3.0.0.530893 2,556 6/4/2018
3.0.0.482510 13,142 5/14/2018
3.0.0.446417 6,202 5/1/2018
3.0.0.427558-pre4 1,294 4/25/2018
3.0.0.354232-pre3 1,290 4/5/2018
3.0.0.296286-pre2 1,323 3/20/2018
2.5.1.527436 10,472 5/4/2018
2.5.1.444934 17,048 4/4/2018
2.5.1.392594-pre3 783 3/21/2018
2.5.1.340284-pre2 1,082 3/9/2018
2.5.1.317207-pre1 1,071 3/1/2018
2.5.0.280555 38,027 2/16/2018
2.5.0.122203 22,422 12/18/2017
2.5.0.121934 21,809 11/28/2017
2.5.0.91635 10,474 11/16/2017
2.5.0.77107 3,536 11/13/2017
2.5.0.75255-pre3 892 11/10/2017
2.5.0.19271-pre2 1,264 10/20/2017
2.4.0.91020 5,653 11/16/2017
2.4.0.74863 4,639 11/10/2017
2.4.0.38779 9,771 10/30/2017
2.4.0.18342 7,083 10/20/2017
2.4.0.282 29,002 9/29/2017
2.4.0.280 4,124 9/27/2017
2.4.0.275-pre3 1,315 9/19/2017
2.4.0.269-pre2 2,368 8/29/2017
2.4.0.266-pre1 2,214 8/16/2017
2.3.5.256-pre6 3,284 6/29/2017
2.3.5.255-pre5 3,474 6/26/2017
2.3.5.239-pre3 3,184 5/11/2017
2.3.5.235-pre2 1,753 4/26/2017
2.3.5.233-pre1 1,328 4/13/2017
2.3.4.270 19,248 8/29/2017
2.3.4.267 11,461 8/16/2017
2.3.4.247 45,308 5/16/2017
2.3.4.231 38,596 4/12/2017
2.3.4.224 14,856 3/29/2017
2.3.4.221-pre6 2,212 3/27/2017
2.3.4.214-pre5 2,459 3/14/2017
2.3.4.212-pre4 1,131 3/10/2017
2.3.4.211-pre3 1,071 3/9/2017
2.3.4.192-pre2 3,480 2/3/2017
2.3.4.184-pre1 2,326 1/13/2017
2.3.3.193 28,982 2/1/2017
2.3.3.180 33,632 1/5/2017
2.3.3.175 9,809 12/6/2016
2.3.3.168 8,333 11/23/2016
2.3.3.166-pre4 1,501 11/3/2016
2.3.3.165-pre4 976 10/27/2016
2.3.3.163-pre3 1,390 10/17/2016
2.3.3.152-pre2 8,708 9/15/2016
2.3.2.127 48,759 9/14/2016
2.3.2.118-pre1 1,878 8/3/2016
2.3.1.114 17,364 8/3/2016
2.3.1.113-pre3 1,234 7/19/2016
2.3.1.111-pre2 1,207 7/4/2016
2.3.1.110-pre1 982 6/29/2016
2.3.0.107 37,835 6/29/2016
2.3.0.49 14,107 6/16/2016
2.3.0.48-pre3 1,012 6/16/2016
2.3.0.46-pre3 1,670 5/30/2016
2.3.0.38-pre2 1,983 4/27/2016
2.3.0.34-pre1 4,611 4/27/2016
2.2.0.45 12,339 5/30/2016
2.2.0.31 35,177 4/27/2016
2.2.0.23-pre4 1,231 4/20/2016
2.2.0.18-pre3 1,043 4/20/2016
2.2.0.16-pre3 1,258 4/20/2016
2.2.0.5-pre2 2,459 4/8/2016
2.2.0.4-pre1 4,523 4/5/2016
2.1.0.6529 11,609 3/13/2016
2.1.0.6526 5,503 3/9/2016
2.1.0.6524 4,231 3/2/2016
2.1.0.6521 1,491 3/1/2016
2.1.0.6517-pre5 1,209 2/18/2016
2.1.0.6513-pre4 1,195 2/9/2016
2.1.0.6508-pre3 1,357 1/28/2016
2.1.0.6503-pre2 1,921 1/22/2016
2.1.0.6501-pre1 956 1/21/2016
2.1.0.6500-pre1 1,098 1/20/2016
2.0.1.6505 18,966 1/28/2016
2.0.1.6495 6,053 1/20/2016
2.0.1.6492-pre1 1,311 12/3/2015
2.0.0.6490 10,323 12/1/2015
2.0.0.6484 2,654 11/21/2015
2.0.0.6482 3,923 11/17/2015
1.5.2.6478-pre3 934 11/17/2015
1.5.2.6477-pre2 1,347 11/10/2015
1.5.2.6469-pre1 1,287 10/20/2015
1.5.1.6471 11,515 10/20/2015
1.5.1.6468 1,446 10/20/2015
1.5.1.6460-pre2 1,018 10/13/2015
1.5.1.6455-pre1 2,240 10/2/2015
1.5.0.6447 9,616 9/25/2015
1.5.0.6446 4,434 9/16/2015
1.5.0.6404-pre3 1,367 8/25/2015
1.5.0.6401-pre2 1,150 8/21/2015
1.5.0.6396-pre1 1,096 8/5/2015
1.4.4.6449 1,363 9/25/2015
1.4.4.6443 1,210 9/16/2015
1.4.4.6392 10,708 7/29/2015
1.4.4.6391 1,150 7/28/2015
1.4.4.6387 1,331 7/27/2015
1.4.4.6379-pre3 1,129 7/20/2015
1.4.4.6378-pre2 1,051 7/16/2015
1.4.4.6377-pre1 1,111 7/14/2015
1.4.3.6376 4,558 7/9/2015
1.4.3.6374 3,389 7/1/2015
1.4.3.6372 1,194 6/30/2015
1.4.3.6364-pre3 1,058 6/16/2015
1.4.3.6358-pre2 1,221 4/24/2015
1.4.3.6356-pre1 1,100 4/21/2015
1.4.2.6359 10,267 4/30/2015
1.4.2.6355 2,984 4/21/2015
1.4.2.6353-pre2 1,089 3/31/2015
1.4.2.6350-pre1 983 3/30/2015
1.4.1.6349 9,655 3/30/2015
1.4.1.6347-pre2 1,276 3/19/2015
1.4.1.6342-pre1 1,191 3/10/2015
1.4.0.6341 3,628 3/9/2015
1.4.0.6340-pre2 989 3/6/2015
1.4.0.6336-pre1 1,031 3/3/2015
1.3.5.6337 1,524 3/5/2015
1.3.5.6335 1,461 3/2/2015
1.3.5.6333-pre1 1,081 2/17/2015
1.3.4.6332 2,163 2/17/2015
1.3.4.6331-pre4 1,103 2/13/2015
1.3.4.6329-pre3 1,010 2/12/2015
1.3.4.6328-pre2 984 2/11/2015
1.3.4.6325-pre1 996 2/9/2015
1.3.3.6323 1,901 2/9/2015
1.3.3.6322-pre3 1,057 2/6/2015
1.3.3.6321-pre2 1,044 2/4/2015
1.3.3.6318-pre1 1,013 2/2/2015
1.3.2.6316 1,700 2/3/2015
1.3.2.6313-pre3 1,036 1/30/2015
1.3.2.6309-pre2 1,053 1/28/2015
1.3.2.6299-pre1 1,149 1/20/2015
1.3.1.6296 5,006 1/4/2015
1.3.1.6294-pre1 1,177 12/24/2014
1.3.0.6292 1,908 12/24/2014
1.3.0.6286-pre4 1,046 12/19/2014
1.3.0.6284-pre3 1,101 12/12/2014
1.3.0.6280-pre2 1,068 12/9/2014
1.3.0.6275-pre1 2,667 11/12/2014
1.2.3.6257 8,345 10/2/2014
1.2.3.6256-pre4 1,053 9/26/2014
1.2.3.6255-pre3 1,656 9/20/2014
1.2.3.6249-pre2 1,092 9/9/2014
1.2.3.6246-pre1 1,086 8/15/2014
1.2.2.6243 3,966 7/30/2014
1.2.2.6241-pre3 1,000 7/28/2014
1.2.2.6240-pre2 1,367 7/22/2014
1.2.2.6238-pre1 986 7/17/2014
1.2.1.6229 2,883 7/14/2014
1.1.1.6206 7,024 6/19/2014
1.1.0.6201 2,072 6/12/2014
1.0.6197 1,461 6/4/2014
1.0.6188 3,564 5/28/2014
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