Contents

onAppear(perform:)

Adds an action to perform before this view appears.

Declaration

nonisolated func onAppear(perform action: (() -> Void)? = nil) -> some View

Parameters

  • action:

    The action to perform. If action is nil, the call has no effect.

Mentioned in

Return Value

A view that triggers action before it appears.

Discussion

The exact moment that SwiftUI calls this method depends on the specific view type that you apply it to, but the action closure completes before the first rendered frame appears.

See Also

Responding to view life cycle updates