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How do you write platform-specific code in shared files? What is MAUI Essentials and what does it provide? How do you access a native view from a MAUI control? How do you request runtime permissions in MAUI? How do you create a custom handler for a brand-new cross-platform control? How do you invoke platform APIs that have no MAUI abstraction, cleanly?
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.NET MAUI › Platform Integration & Handlers

How do you customize a control on a single platform using a handler?

Intermediate

Answer

Use PropertyMapper customization scoped by checking the view instance, or subclass the handler for that control and register it. AppendToMapping adds behavior after the default; ModifyMapping replaces a specific property's mapping. Guard native calls with platform #if.
#if IOS
Microsoft.Maui.Handlers.SwitchHandler.Mapper.AppendToMapping(
    "Tint", (h, v) => h.PlatformView.OnTintColor =
        UIKit.UIColor.SystemGreenColor);
#endif
Real-world example Product design wants iOS switches tinted brand-green; a single iOS-guarded mapper achieves it without touching Android.

Common follow-ups: AppendToMapping vs ModifyMapping? | How do you scope to one control instance?

Handlers Property Mapper Custom Controls
All 7 Platform Integration & Handlers questions