SwiftUI withAnimation completion callback

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Unfortunately there’s no good solution to this problem (yet).

However, if you can specify the duration of an Animation, you can use DispatchQueue.main.asyncAfter to trigger an action exactly when the animation finishes:

withAnimation(.linear(duration: 0.1)) {
    self.someState = newState
}

DispatchQueue.main.asyncAfter(deadline: .now() + 0.1) {
    print("Animation finished")
}

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