Contents

TransitionPhase

An indication of which the current stage of a transition.

Declaration

@frozen enum TransitionPhase

Overview

When a view is appearing with a transition, the transition will first be shown with the willAppear phase, then will be immediately moved to the identity phase. When a view is being removed, its transition is changed from the identity phase to the didDisappear phase. If a view is removed while it is still transitioning in, then its phase will change to didDisappear. If a view is re-added while it is transitioning out, its phase will change back to identity.

In the identity phase, transitions should generally not make any visual change to the view they are applied to, since the transition’s view modifications in the identity phase will be applied to the view as long as it is visible. In the willAppear and didDisappear phases, transitions should apply a change that will be animated to create the transition. If no animatable change is applied, then the transition will be a no-op.

  • See Also: Transition

  • See Also: AnyTransition

Topics

Getting the phase

Getting phase characteristics

See Also

Defining transitions