DebugReplaceableView

struct · iOS 26.0+ · SDK 27.1

nonisolated struct DebugReplaceableView

Erases view opaque result types in debug builds. You don't use this type directly. Instead SwiftUI creates this type on your behalf when building in debug mode. When in debug builds, SwiftUI will erase all opaque result types to `DebugReplaceableView`. This allows developer tools, such as Xcode Previews, to replace the definition of the view without fully rebuilding. As such, seeing this type in traces and the view debugger is expected when building for debugging. This type erasure can impact performance, especially when dealing with dynamic content (like content generated by a ForEach, or List) so any performance testing should be done in release mode. This type acts similarly to an `AnyView` in that it type-erases its content, however it depends on the underlying type of the value not actually changing as it is in place of an opaque result type. As such, it *should not be used in app code*.

Members (0)

This type has no directly callable members in this snapshot. See the framework’s skipped declarations for unsupported APIs.

All SwiftUICore types →