[iOS, macOS] Fixed Shell Flyout Icon is always black

[Dhivya-SF4094]

Note

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Issue Details

While setting a custom flyout icon, irrespective of the actual png image color, the icon is always black.

Root Cause

• The issue on iOS stems from a platform change introduced in iOS 26. In earlier versions of iOS, the navigation bar and its toolbar items followed a predictable tint inheritance model. MAUI sets the navigation bar’s tint color through the ShellNavBarAppearanceTracker.SetAppearance() method, and UIBarButtonItem automatically inherited this tint. Because the flyout icon uses template rendering mode, it correctly adopted the color defined by Shell.ForegroundColor.
• However, in iOS 26, Apple changed the tint inheritance behavior so that UIBarButtonItem no longer inherits the tint from UINavigationBar.
• Even though MAUI still assigns a tint to the navigation bar, the flyout icon falls back to the system default blue instead of using the intended shell foreground color.

Description of Change

To fix this, the tint color is now explicitly assigned to the UIBarButtonItem when it is created in the ShellPageRendererTracker.UpdateLeftToolBarItems()method. By directly setting the tint on the button, the icon correctly reflects the foreground color on both older iOS versions and iOS 26.

Validated the behaviour in the following platforms

• Android
• Windows The Shell FlyoutIcon foreground color is not applied on the Windows platform. #26148
• iOS
• Mac

Issues Fixed:

Fixes #32867

Screenshots

Before	After