UIKit interop on iOS

Haze captures pixels that Compose draws. Content hosted by UIKitView or UIKitViewController is rendered by UIKit, so Haze cannot capture it.

Overlay placement

UIKitInteropProperties.placedAsOverlay changes where UIKit is composited relative to Compose's Metal canvas; it does not make UIKit pixels available to Haze.

placedAsOverlay	Placement	Effect on Haze
false (default)	UIKit stays below the Compose Metal canvas. Compose draws a transparent cut-out where the UIKit view appears.	Haze cannot capture the UIKit view.
true	UIKit is placed above the Compose Metal canvas.	The UIKit view covers overlapping Compose and Haze content. Haze still cannot capture it.

See Compose Multiplatform's overlay placement guidance. The other UIKitInteropProperties, interactionMode and isNativeAccessibilityEnabled, do not affect capture either.

Support

UIKit content	Can Haze capture it?	Requirement
WKWebView in UIKitView	No	Use a renderer that draws into Compose.
AVPlayerLayer hosted by UIKitView	No	Use a video renderer that draws into Compose.
Other UIKitView or UIKitViewController content	No	Render the content in Compose instead.

To apply Blur or Glass over this content, use a rendering path that draws into Compose and mark it with hazeSource.