I have the same issue, no workaround yet.

Description

When Switch control is turned off, the control background has different colors on Android and iOS. I also struggle to find a property which controls this color.

Steps to Reproduce

1. Create a MAUI app from default template
2. Place a Switch control on the screen
3. Run on Android and iOS
4. Turn the control on, then back off.
5. Observe control background difference between Android and iOS

Link to public reproduction project repository

https://github.com/MichaelSL/NET-MAUI-Switch-Style-Bug-Repro

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

iOS, Android

Affected platform versions

iOS 16

Did you find any workaround?

No response

Relevant log output

No response

Another possibly related issue: when I navigate between pages, I get the following exception: Microsoft.Maui.Controls.SolidColorBrush is already a child of Tripsta.MainPage. Remove Microsoft.Maui.Controls.SolidColorBrush from Tripsta.MainPage before adding to Tripsta.CoursePage.

Both pages use SolidColorBrush declared in Styles.xaml as a background.

Unfortunately explicit tab declaration kills all the TabBar styles :(

I can also confirm that SolidColorBrush works fine on both Android and iOs

Description

I have created a style for my MAUI app pages. It works fine on Android. On iOS it doesn't load the style on initial page load. If i navigate away from the page and then navigate back style is loaded.

Application uses Shell with Tabs for navigation.

Steps to Reproduce

1. Create a new MAUI Application
2. Create second app page
3. Add Tab navigation

<?xml version="1.0" encoding="UTF-8" ?>
<Shell
    x:Class="StylesLoadBugRepro.AppShell"
    xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
    xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
    xmlns:local="clr-namespace:StylesLoadBugRepro"
    Shell.FlyoutBehavior="Disabled">

    <TabBar>
        <ShellContent
            Title="Home"
            ContentTemplate="{DataTemplate local:MainPage}"
            Route="MainPage" />
        <ShellContent
            Title="Other"
            ContentTemplate="{DataTemplate local:OtherPage}"
            Route="OtherPage" />
    </TabBar>
    
</Shell>

4. Create brush for your background in `Resources/Styles/Colors.xaml':

    <Color x:Key="PageBackgroundGradientStart">#0C5A56</Color>
    <Color x:Key="PageBackgroundGradientEnd">#031E17</Color>
    <LinearGradientBrush x:Key="PageBackgroundBrush"
                         EndPoint="0,1">
        <GradientStop Color="{StaticResource PageBackgroundGradientStart}"
                          Offset="0.9" />
        <GradientStop Color="{StaticResource PageBackgroundGradientEnd}"
                          Offset="1.0" />
    </LinearGradientBrush>

5. Change page style in Resources/Styles/Styles.xaml:

    <Style TargetType="Page" ApplyToDerivedTypes="True">
        <Setter Property="Padding" Value="0"/>
        <Setter Property="Background" Value="{StaticResource PageBackgroundBrush}" />
    </Style>

6. Run the application.

Expected: page background is custom. Actual: page background is default color (Black or White depending on app theme)

7. Switch to another tab
8. Switch back to the home page

Now page background is customized.

Note: i tried to put Background directly into ContentPage instead of Styles but it doesn't work either.

Link to public reproduction project repository

https://github.com/MichaelSL/NET-MAUI-iOS-Style-load-bug-repro

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 16

Did you find any workaround?

No, no workaround yet.

Relevant log output

2023-04-19 16:58:19.212346-0600 StylesLoadBugRepro[3363:21410] SecTaskLoadEntitlements failed error=22 cs_flags=200, pid=3363
2023-04-19 16:58:19.213907-0600 StylesLoadBugRepro[3363:21410] SecTaskCopyDebugDescription: StylesLoadBugRep[3363]/0#-1 LF=0
2023-04-19 16:58:19.305542-0600 StylesLoadBugRepro[3363:21410] SecTaskLoadEntitlements failed error=22 cs_flags=200, pid=3363
2023-04-19 16:58:19.305665-0600 StylesLoadBugRepro[3363:21410] SecTaskCopyDebugDescription: StylesLoadBugRep[3363]/0#-1 LF=0
Thread started:  #2
Thread started:  #3
Thread started:  #4
Loaded assembly: /Users/michael/Library/Developer/CoreSimulator/Devices/97A00BCF-B417-47FB-A7F3-004384900EFE/data/Containers/Bundle/Application/17ECE94D-F3A4-41DF-B8BB-09B9AE6B08B2/StylesLoadBugRepro.app/System.Runtime.Serialization.Json.dll [External]
Loaded assembly: /Users/michael/Library/Developer/CoreSimulator/Devices/97A00BCF-B417-47FB-A7F3-004384900EFE/data/Containers/Bundle/Application/17ECE94D-F3A4-41DF-B8BB-09B9AE6B08B2/StylesLoadBugRepro.app/System.Private.DataContractSerialization.dll [External]
Loaded assembly: /Users/michael/Library/Developer/CoreSimulator/Devices/97A00BCF-B417-47FB-A7F3-004384900EFE/data/Containers/Bundle/Application/17ECE94D-F3A4-41DF-B8BB-09B9AE6B08B2/StylesLoadBugRepro.app/System.Runtime.Serialization.Xml.dll [External]
Loaded assembly: /Users/michael/Library/Developer/CoreSimulator/Devices/97A00BCF-B417-47FB-A7F3-004384900EFE/data/Containers/Bundle/Application/17ECE94D-F3A4-41DF-B8BB-09B9AE6B08B2/StylesLoadBugRepro.app/System.Runtime.Serialization.Primitives.dll [External]
2023-04-19 16:58:20.255065-0600 StylesLoadBugRepro[3363:21850] SecTaskLoadEntitlements failed error=22 cs_flags=200, pid=3363
2023-04-19 16:58:20.255220-0600 StylesLoadBugRepro[3363:21850] SecTaskCopyDebugDescription: StylesLoadBugRep[3363]/0#-1 LF=0
2023-04-19 16:58:20.482580-0600 StylesLoadBugRepro[3363:21410] [TableView] Warning once only: UITableView was told to layout its visible cells and other contents without being in the view hierarchy (the table view or one of its superviews has not been added to a window). This may cause bugs by forcing views inside the table view to load and perform layout without accurate information (e.g. table view bounds, trait collection, layout margins, safe area insets, etc), and will also cause unnecessary performance overhead due to extra layout passes. Make a symbolic breakpoint at UITableViewAlertForLayoutOutsideViewHierarchy to catch this in the debugger and see what caused this to occur, so you can avoid this action altogether if possible, or defer it until the table view has been added to a window. Table view: <_UIMoreListTableView: 0x7fe0b3a2d600; frame = (0 0; 0 0); clipsToBounds = YES; gestureRecognizers = <NSArray: 0x600003a30c30>; backgroundColor = <UIDynamicSystemColor: 0x6000021339c0; name = tableBackgroun
dColor>; layer = <CALayer: 0x6000030dfa40>; contentOffset: {0, 0}; contentSize: {0, 0}; adjustedContentInset: {0, 0, 0, 0}; dataSource: <UIMoreListController: 0x7fe0acf70770>>
2023-04-19 16:58:20.865231-0600 StylesLoadBugRepro[3363:21410] SecTaskLoadEntitlements failed error=22 cs_flags=200, pid=3363
2023-04-19 16:58:20.865453-0600 StylesLoadBugRepro[3363:21410] SecTaskCopyDebugDescription: StylesLoadBugRep[3363]/0#-1 LF=0
Thread started: .NET Timer #5
Thread started: <Thread Pool> #6
Thread started: .NET ThreadPool Gate #7
Thread started: <Thread Pool> #8
Loaded assembly: /Users/michael/Library/Developer/CoreSimulator/Devices/97A00BCF-B417-47FB-A7F3-004384900EFE/data/Containers/Bundle/Application/17ECE94D-F3A4-41DF-B8BB-09B9AE6B08B2/StylesLoadBugRepro.app/System.Runtime.Intrinsics.dll [External]
2023-04-19 16:58:24.318471-0600 StylesLoadBugRepro[3363:21808] Warning: observer object was not disposed manually with Dispose()
2023-04-19 16:58:24.318668-0600 StylesLoadBugRepro[3363:21808] Warning: observer object was not disposed manually with Dispose()
Loaded assembly: /Users/michael/Library/Developer/CoreSimulator/Devices/97A00BCF-B417-47FB-A7F3-004384900EFE/data/Containers/Bundle/Application/17ECE94D-F3A4-41DF-B8BB-09B9AE6B08B2/StylesLoadBugRepro.app/System.Xml.XmlSerializer.dll [External]
Thread started: <Thread Pool> #9
Thread started: <Thread Pool> #10
Thread finished: <Thread Pool> #8
Thread finished: <Thread Pool> #6
The thread 0x8 has exited with code 0 (0x0).
The thread 0x6 has exited with code 0 (0x0).
[0:] Microsoft.Maui.Controls.Element: Warning: Microsoft.Maui.Controls.LinearGradientBrush is already a child of StylesLoadBugRepro.MainPage. Remove Microsoft.Maui.Controls.LinearGradientBrush from StylesLoadBugRepro.MainPage before adding to StylesLoadBugRepro.OtherPage.
Thread started: <Thread Pool> #11
2023-04-19 16:59:35.245880-0600 StylesLoadBugRepro[3363:21808] Warning: observer object was not disposed manually with Dispose()
2023-04-19 16:59:35.246006-0600 StylesLoadBugRepro[3363:21808] Warning: observer object was not disposed manually with Dispose()
2023-04-19 16:59:41.729760-0600 StylesLoadBugRepro[3363:21758] [client] Timed out waiting for the exit barrier block. activeSendTransactions=0

Description

XAML binding, which uses another element as BindingContext doesn't work on iOs but works on Android. This issues was confirmed by MSFT on stack overflow.

Steps to Reproduce

Create a MAUI app and add following code to the page:

<VerticalStackLayout Grid.Row="1"
                     Grid.Column="0">
    <Label x:Name="lblDistanceText"
       Text="Distance"
       FontSize="Medium"
       FontAttributes="Bold"
       VerticalOptions="CenterAndExpand"
       HorizontalOptions="Center"
       Margin="0,0,0,0"/>
    <Line Stroke="DarkGreen"
          StrokeThickness="3"
          StrokeLineCap="Round"
          Opacity="0.85"
          HorizontalOptions="Center"
          X2="{Binding Source={x:Reference lblDistanceText}, Path=Width}">
        <Line.Shadow>
            <Shadow Brush="DarkGreen"
                Offset="0,0"
                Radius="6"
                Opacity="0.9" />
        </Line.Shadow>
    </Line>
    <Label 
       Text="TotalDistance here"
       FontSize="Medium"
       FontAttributes="Bold"
       VerticalOptions="CenterAndExpand"
       HorizontalOptions="Center"
       Margin="0,0,0,0"/>
</VerticalStackLayout>

Expected result: green line width is the same as lblDistanceText width. Actual result: green line width is 1.

Link to public reproduction project repository

https://stackoverflow.com/questions/75979009/net-maui-binding-to-another-elements-property-doesnt-work-on-ios/75982382#75982382

Version with bug

7.0 (current)

Last version that worked well

Unknown/Other

Affected platforms

iOS

Affected platform versions

iOS 16

Did you find any workaround?

No workaround yet. Tried to use Label as BindingContext but it didn't work.

Relevant log output

No response

I wonder if this relates to the different behavior of Loaded event on Android and iOs. I have Shell application with several pages.

On Android:

1. application starts up with Page1
2. Page1 Loaded event handler fires
3. navigate to Page2
4. return to Page1
5. Page1 Loaded event doesn't fire

On iOS:

1. application starts up with Page1
2. Page1 Loaded event handler fires
3. navigate to Page2
4. return to Page1
5. Page1 Loaded event always fire

Basically, cross platform code needs workaround for iOs to avoid running same code multiple times. I wonder if this issue will help to make lifecycle events behavior more uniform?