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I Have an app with master-detail page and toolbar items for every page. I set the master-detail page and the master page to NavigationPage.HasNavigationBar="False" to avoid duplication of the toolbar items. In Android, it works fine and no duplication, but for iOS, it still gives a duplicate for the toolbar items that has Order="Secondary"

Here is the Menu Page(Detail page):

 <?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
 xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
 xmlns:controls="clr-namespace:ImageCircle.Forms.Plugin.Abstractions;assembly=ImageCircle.Forms.Plugin"
 xmlns:effects="clr-namespace:AppXamarin"
 x:Class="AppXamarin.Pages.MenuPage" NavigationPage.HasBackButton="False">
 <ContentPage.BackgroundImage>
 <OnPlatform Android="exp20181029Artboard46" iOS="OnIdiom Phone='exp20181029Artboard46',Tablet='Artboard'"/>
 </ContentPage.BackgroundImage>
 <ContentPage.ToolbarItems>
 <ToolbarItem Name="menuitem1" Order="Secondary" Text="logout" Priority="0" Clicked="MenuItem1_Clicked"/>
 <ToolbarItem Order="Primary" Priority="1" Clicked="cart_Clicked" Text="cart" x:Name="cart"/>
 <ToolbarItem Order="Primary" Priority="0" Text="search" x:Name="searchbar" Icon="search.png"/>
 </ContentPage.ToolbarItems>

Master Main Page:

<?xml version="1.0" encoding="utf-8" ?>
<MasterDetailPage xmlns="http://xamarin.com/schemas/2014/forms"
 xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
 xmlns:local="clr-namespace:AppXamarin.Pages"
 x:Class="AppXamarin.Pages.MasterMainPage" NavigationPage.HasNavigationBar="False" NavigationPage.HasBackButton="False"
 >

 <MasterDetailPage.Master>
 <local:MasterPage x:Name ="masterPage"/>
 </MasterDetailPage.Master>

 <MasterDetailPage.Detail>
 <NavigationPage>
 <x:Arguments>
 <local:MenuPage></local:MenuPage>
 </x:Arguments>
 </NavigationPage>
 </MasterDetailPage.Detail>
</MasterDetailPage>

And the Master Page:

<?xml version="1.0" encoding="utf-8" ?>
<ContentPage xmlns="http://xamarin.com/schemas/2014/forms"
 xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
 x:Class="AppXamarin.Pages.MasterPage"
 NavigationPage.HasNavigationBar="False" NavigationPage.HasBackButton="False" >
 <ContentPage.Title>
 <OnPlatform Android="Menu" iOS="☰"/>
 </ContentPage.Title>
 <ContentPage.Icon>
 <OnPlatform Android="menu.png"/>
 </ContentPage.Icon>
 <ContentPage.Content>
 <StackLayout>
 <Label Text="Welcome to Xamarin.Forms!"
 VerticalOptions="CenterAndExpand" 
 HorizontalOptions="CenterAndExpand" />
 </StackLayout>
 </ContentPage.Content>
</ContentPage>

iOS result here

Android result here

Thanks in advance.

switch (Device.RuntimePlatform)
 
 case Device.iOS:

 NavigationPage.SetHasNavigationBar(this, false);
 break;
 

Try this in the Code-Behind

Maybe there is a bug on iOS for secondary toolbar items. I handle it by setting the order to primary on iOS and secondary on Android.

<ToolbarItem Name="menuitem1" Text="logout" Priority="0" Clicked="MenuItem1_Clicked">
 <ToolbarItem.Order>
 <OnPlatform Android="Secondary" iOS="Primary"/>
 </ToolbarItem.Order>