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As the error message states : NavigationPage must have a root page before being used(on iOS)
.
We just need to Warp a contentPage inside the NavigationPage
as following
<local:Page1/>
<NavigationPage Title="1" >
<x:Arguments>
<local:Page2 />
</x:Arguments>
</NavigationPage>
<NavigationPage Title="2">
<x:Arguments>
<local:Page3 />
</x:Arguments>
</NavigationPage>
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