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Uno.Contributing.iOS

How Uno works on iOS

This article explores iOS-specific details of Uno's internals, with a focus on information that's useful for contributors to Uno. For an overview of how Uno works on all platforms, see this article.

UIElement inherits from UIView

UIElement in Uno is a native view on iOS, inheriting from the general UIView type. To elaborate, UIElement's base classes are the following: UIKit.UIView → Uno.UI.Controls.BindableUIView → Windows.UI.Xaml.UIElement

Recall that UIElement implements DependencyObject as an interface in Uno.

Layouting

Uno's measure and arrange logic is triggered from the native iOS layout cycle. For a schematic of the control flow, see Layouting in iOS.