📦Animation

SwiftUI ⟩ animations ⟩ Animation (struct)

🔴 主題

• animate state changes

code

👉 Sec. 5: Compose Animations for Complex Effects - Step 3.

extension Animation {
    /// `Animation.ripple()`
    /// - Returns: `Animation`
    static func ripple() -> Animation {
        Animation
            /// ⭐️ a reduced damping fraction makes the views hop.
            .spring(dampingFraction: 0.5)
            /// ⭐️ speed up the animation, to shorten the time
            ///    it takes to move to its new position.
            .speed(2)
            /// ⭐️ add a delay to each animation based on
            ///    the view's `index` on the graph.
            .delay(0.03 * Double(index))
    }
}

MyView().animation(.ripple())

📘 手冊

• SwiftUI Tutorials ⟩ Animating Views & Transitions ⟩

  • Sec. 5: Compose Animations for Complex Effects - Step 3.

• SwiftUI ⟩

  • Drawing and Animation ⟩

    • Animation (struct)

    • Animatable (protocol) - describes how to animate a property of a view

    • withAnimation(::)

  • View ⟩ Graphics and Rendering ⟩

    • .animation(_:) - applied to equatable view

    • .animation(_:value:) - applied to equatable value (non-equatable view)