【SwiftUI】Basic transition 👉 https://zenn.dev/maochanz/articles/0bcd4bfaa43a0d

TestTransition.swift

import SwiftUI

struct TestTransition: View {
  @State private var active = false

  var body: some View {
    VStack {
      if active {
        Image(systemName: "face.smiling")
          .font(.system(size: 100))
          .transition(.slide)
        Image(systemName: "face.smiling")
          .font(.system(size: 100))
          .transition(.opacity)
        Image(systemName: "face.smiling")
          .font(.system(size: 100))
          .transition(.scale)
        Image(systemName: "face.smiling")
          .font(.system(size: 100))
          .transition(.slide.combined(with: .scale))
        Image(systemName: "face.smiling")
          .font(.system(size: 100))
          .transition(.asymmetric(insertion: .slide, removal: .scale))
      }

      Button(active ? "hide" : "show") {
        withAnimation {
          active.toggle()
        }
      }
      .buttonStyle(.borderedProminent)
    }
  }
}

#Preview {
  TestTransition()
#if os(macOS)
    .frame(width: 300, height: 600)
#endif
}