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How to create asymmetric transitions

Paul Hudson    @twostraws   

Fully updated for Xcode 11.2

SwiftUI lets us specify one transition when adding a view and another when removing it, all done using the asymmetric() transition type.

For example, we can create a text view that uses asymmetric transitions so that it moves in from the leading edge when added and moves down to the bottom edge when being removed, like this:

Text("Details go here.")
    .transition(.asymmetric(insertion: .move(edge: .leading), removal: .move(edge: .bottom)))

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