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There is a newer version of this package available.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/appcenter
Central repository for App Center open source resources and planning.
microsoft/SmartHotel360-Mobile
SmartHotel360 Mobile
conceptdev/xamarin-forms-samples
Samples that use Xamarin.Forms (http://xamarin.com/forms)
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

Read more about the GitHub Usage information on our documentation.

Version History

Version Downloads Last updated
4.5.0.282-pre4 278 2/10/2020
4.5.0.266-pre3 173 2/5/2020
4.5.0.187-pre2 538 1/23/2020
4.5.0.142-pre1 396 1/13/2020
4.4.0.991640 3,845 2/5/2020
4.4.0.991537 6,563 1/23/2020
4.4.0.991477 7,228 1/10/2020
4.4.0.991265 17,685 12/12/2019
4.4.0.991220-pre3 198 12/4/2019
4.4.0.991210-pre2 512 11/14/2019
4.4.0.936621-pre1 422 10/31/2019
4.3.0.991250 1,618 12/12/2019
4.3.0.991221 8,629 12/4/2019
4.3.0.991211 15,628 11/14/2019
4.3.0.947036 11,785 10/29/2019
4.3.0.908675 18,960 10/21/2019
4.3.0.851321-pre3 752 10/2/2019
4.3.0.819712-pre2 339 9/19/2019
4.3.0.778476-pre1 470 9/11/2019
4.2.0.910310 2,171 10/21/2019
4.2.0.848062 13,759 10/2/2019
4.2.0.815419 8,610 9/19/2019
4.2.0.778463 6,068 9/11/2019
4.2.0.709249 28,402 8/21/2019
4.2.0.673161-pre3 426 8/7/2019
4.2.0.618605-pre2 359 7/24/2019
4.2.0.608146-pre1 278 7/16/2019
4.1.0.778454 2,497 9/11/2019
4.1.0.709244 3,851 8/21/2019
4.1.0.673156 13,267 8/7/2019
4.1.0.618606 15,185 7/24/2019
4.1.0.581479 14,442 7/9/2019
4.1.0.555618 11,254 6/28/2019
4.1.0.496342-pre2 572 6/13/2019
4.1.0.483098-pre1 750 6/5/2019
4.0.0.709238 636 8/21/2019
4.0.0.618610 969 7/24/2019
4.0.0.540366 6,674 6/27/2019
4.0.0.497661 12,078 6/13/2019
4.0.0.482894 5,001 6/3/2019
4.0.0.425677 24,545 5/14/2019
4.0.0.394984-pre10 721 5/3/2019
4.0.0.346134-pre9 997 4/18/2019
4.0.0.304370-pre8 873 4/3/2019
4.0.0.250467-pre7 657 3/20/2019
4.0.0.232914-pre6 488 3/14/2019
4.0.0.169046-pre5 849 2/21/2019
4.0.0.135214-pre4 576 2/6/2019
4.0.0.94569-pre3 614 1/24/2019
4.0.0.62955-pre2 652 1/10/2019
4.0.0.8055-pre1 1,480 12/4/2018
3.6.0.709228 2,317 8/21/2019
3.6.0.539721 2,904 6/27/2019
3.6.0.344457 36,048 4/18/2019
3.6.0.293080 16,316 4/3/2019
3.6.0.264807 10,718 3/19/2019
3.6.0.220655 15,227 3/6/2019
3.6.0.169048-pre2 319 2/21/2019
3.6.0.135200-pre1 330 2/6/2019
3.5.0.274416 4,412 3/26/2019
3.5.0.169047 8,717 2/20/2019
3.5.0.129452 12,474 2/6/2019
3.5.0.94564-pre3 355 1/24/2019
3.5.0.62956-pre2 423 1/10/2019
3.4.0.1039999 2,066 3/26/2019
3.4.0.1029999 9,181 1/24/2019
3.4.0.1009999 21,560 1/4/2019
3.4.0.1008975 49,391 11/15/2018
3.4.0.987044-pre2 627 11/8/2018
3.4.0.925479-pre1 1,438 10/18/2018
3.3.0.967583 15,459 11/1/2018
3.3.0.912540 14,262 10/18/2018
3.3.0.893527-pre3 761 10/11/2018
3.3.0.871608-pre2 1,918 10/1/2018
3.3.0.840541-pre1 2,027 9/20/2018
3.2.0.871581 21,886 10/3/2018
3.2.0.839982 23,074 9/17/2018
3.2.0.809874-pre3 933 9/10/2018
3.2.0.729530-pre2 1,514 8/14/2018
3.2.0.637442-pre1 2,548 7/17/2018
3.1.0.697729 27,506 8/1/2018
3.1.0.637273 20,602 7/11/2018
3.1.0.583944 22,204 6/20/2018
3.1.0.561732-pre4 1,014 6/11/2018
3.1.0.550168-pre3 906 6/6/2018
3.1.0.530888-pre2 934 6/4/2018
3.1.0.469394-pre1 1,554 5/9/2018
3.0.0.561731 7,945 6/11/2018
3.0.0.550146 3,668 6/6/2018
3.0.0.530893 2,681 6/4/2018
3.0.0.482510 13,362 5/14/2018
3.0.0.446417 6,470 5/1/2018
3.0.0.427558-pre4 1,358 4/25/2018
3.0.0.354232-pre3 1,350 4/5/2018
3.0.0.296286-pre2 1,381 3/20/2018
2.5.1.527436 11,915 5/4/2018
2.5.1.444934 17,465 4/4/2018
2.5.1.392594-pre3 831 3/21/2018
2.5.1.340284-pre2 1,143 3/9/2018
2.5.1.317207-pre1 1,129 3/1/2018
2.5.0.280555 39,720 2/16/2018
2.5.0.122203 22,942 12/18/2017
2.5.0.121934 22,522 11/28/2017
2.5.0.91635 10,609 11/16/2017
2.5.0.77107 3,625 11/13/2017
2.5.0.75255-pre3 940 11/10/2017
2.5.0.19271-pre2 1,325 10/20/2017
2.4.0.91020 6,387 11/16/2017
2.4.0.74863 4,709 11/10/2017
2.4.0.38779 9,924 10/30/2017
2.4.0.18342 7,351 10/20/2017
2.4.0.282 29,868 9/29/2017
2.4.0.280 4,219 9/27/2017
2.4.0.275-pre3 1,375 9/19/2017
2.4.0.269-pre2 2,433 8/29/2017
2.4.0.266-pre1 2,325 8/16/2017
2.3.5.256-pre6 3,345 6/29/2017
2.3.5.255-pre5 3,532 6/26/2017
2.3.5.239-pre3 3,243 5/11/2017
2.3.5.235-pre2 1,814 4/26/2017
2.3.5.233-pre1 1,387 4/13/2017
2.3.4.270 19,633 8/29/2017
2.3.4.267 12,061 8/16/2017
2.3.4.247 46,104 5/16/2017
2.3.4.231 39,057 4/12/2017
2.3.4.224 14,986 3/29/2017
2.3.4.221-pre6 2,262 3/27/2017
2.3.4.214-pre5 2,517 3/14/2017
2.3.4.212-pre4 1,189 3/10/2017
2.3.4.211-pre3 1,120 3/9/2017
2.3.4.192-pre2 3,545 2/3/2017
2.3.4.184-pre1 2,432 1/13/2017
2.3.3.193 30,418 2/1/2017
2.3.3.180 33,834 1/5/2017
2.3.3.175 9,912 12/6/2016
2.3.3.168 8,404 11/23/2016
2.3.3.166-pre4 1,564 11/3/2016
2.3.3.165-pre4 1,024 10/27/2016
2.3.3.163-pre3 1,438 10/17/2016
2.3.3.152-pre2 8,959 9/15/2016
2.3.2.127 49,378 9/14/2016
2.3.2.118-pre1 2,002 8/3/2016
2.3.1.114 17,479 8/3/2016
2.3.1.113-pre3 1,307 7/19/2016
2.3.1.111-pre2 1,260 7/4/2016
2.3.1.110-pre1 1,033 6/29/2016
2.3.0.107 38,201 6/29/2016
2.3.0.49 14,361 6/16/2016
2.3.0.48-pre3 1,082 6/16/2016
2.3.0.46-pre3 1,723 5/30/2016
2.3.0.38-pre2 2,076 4/27/2016
2.3.0.34-pre1 4,704 4/27/2016
2.2.0.45 12,628 5/30/2016
2.2.0.31 35,524 4/27/2016
2.2.0.23-pre4 1,302 4/20/2016
2.2.0.18-pre3 1,113 4/20/2016
2.2.0.16-pre3 1,327 4/20/2016
2.2.0.5-pre2 2,529 4/8/2016
2.2.0.4-pre1 4,595 4/5/2016
2.1.0.6529 11,725 3/13/2016
2.1.0.6526 5,573 3/9/2016
2.1.0.6524 4,303 3/2/2016
2.1.0.6521 1,563 3/1/2016
2.1.0.6517-pre5 1,284 2/18/2016
2.1.0.6513-pre4 1,266 2/9/2016
2.1.0.6508-pre3 1,428 1/28/2016
2.1.0.6503-pre2 1,990 1/22/2016
2.1.0.6501-pre1 1,020 1/21/2016
2.1.0.6500-pre1 1,170 1/20/2016
2.0.1.6505 19,054 1/28/2016
2.0.1.6495 6,129 1/20/2016
2.0.1.6492-pre1 1,379 12/3/2015
2.0.0.6490 10,530 12/1/2015
2.0.0.6484 2,725 11/21/2015
2.0.0.6482 3,988 11/17/2015
1.5.2.6478-pre3 982 11/17/2015
1.5.2.6477-pre2 1,417 11/10/2015
1.5.2.6469-pre1 1,358 10/20/2015
1.5.1.6471 11,594 10/20/2015
1.5.1.6468 1,517 10/20/2015
1.5.1.6460-pre2 1,079 10/13/2015
1.5.1.6455-pre1 2,325 10/2/2015
1.5.0.6447 9,687 9/25/2015
1.5.0.6446 4,514 9/16/2015
1.5.0.6404-pre3 1,438 8/25/2015
1.5.0.6401-pre2 1,223 8/21/2015
1.5.0.6396-pre1 1,158 8/5/2015
1.4.4.6449 1,438 9/25/2015
1.4.4.6443 1,283 9/16/2015
1.4.4.6392 10,799 7/29/2015
1.4.4.6391 1,212 7/28/2015
1.4.4.6387 1,390 7/27/2015
1.4.4.6379-pre3 1,188 7/20/2015
1.4.4.6378-pre2 1,111 7/16/2015
1.4.4.6377-pre1 1,194 7/14/2015
1.4.3.6376 4,635 7/9/2015
1.4.3.6374 3,451 7/1/2015
1.4.3.6372 1,265 6/30/2015
1.4.3.6364-pre3 1,119 6/16/2015
1.4.3.6358-pre2 1,281 4/24/2015
1.4.3.6356-pre1 1,161 4/21/2015
1.4.2.6359 10,409 4/30/2015
1.4.2.6355 3,084 4/21/2015
1.4.2.6353-pre2 1,141 3/31/2015
1.4.2.6350-pre1 1,046 3/30/2015
1.4.1.6349 9,772 3/30/2015
1.4.1.6347-pre2 1,336 3/19/2015
1.4.1.6342-pre1 1,253 3/10/2015
1.4.0.6341 3,692 3/9/2015
1.4.0.6340-pre2 1,040 3/6/2015
1.4.0.6336-pre1 1,096 3/3/2015
1.3.5.6337 1,588 3/5/2015
1.3.5.6335 1,524 3/2/2015
1.3.5.6333-pre1 1,143 2/17/2015
1.3.4.6332 2,228 2/17/2015
1.3.4.6331-pre4 1,167 2/13/2015
1.3.4.6329-pre3 1,072 2/12/2015
1.3.4.6328-pre2 1,047 2/11/2015
1.3.4.6325-pre1 1,060 2/9/2015
1.3.3.6323 1,962 2/9/2015
1.3.3.6322-pre3 1,124 2/6/2015
1.3.3.6321-pre2 1,096 2/4/2015
1.3.3.6318-pre1 1,078 2/2/2015
1.3.2.6316 1,754 2/3/2015
1.3.2.6313-pre3 1,098 1/30/2015
1.3.2.6309-pre2 1,114 1/28/2015
1.3.2.6299-pre1 1,213 1/20/2015
1.3.1.6296 5,075 1/4/2015
1.3.1.6294-pre1 1,239 12/24/2014
1.3.0.6292 1,972 12/24/2014
1.3.0.6286-pre4 1,106 12/19/2014
1.3.0.6284-pre3 1,165 12/12/2014
1.3.0.6280-pre2 1,131 12/9/2014
1.3.0.6275-pre1 2,716 11/12/2014
1.2.3.6257 8,408 10/2/2014
1.2.3.6256-pre4 1,103 9/26/2014
1.2.3.6255-pre3 1,710 9/20/2014
1.2.3.6249-pre2 1,153 9/9/2014
1.2.3.6246-pre1 1,137 8/15/2014
1.2.2.6243 4,034 7/30/2014
1.2.2.6241-pre3 1,051 7/28/2014
1.2.2.6240-pre2 1,416 7/22/2014
1.2.2.6238-pre1 1,035 7/17/2014
1.2.1.6229 2,933 7/14/2014
1.1.1.6206 7,080 6/19/2014
1.1.0.6201 2,123 6/12/2014
1.0.6197 1,519 6/4/2014
1.0.6188 3,628 5/28/2014
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