长按 animation 与 Swift UI

Question

我有一个长按手势，突出显示另一个按钮。 代码如下所示：

@GestureState var highlight = false

var body: some View {
    var longPress: some Gesture {
        LongPressGesture(minimumDuration: 3)
            .updating($highlight) { currentstate, gestureState, transaction in
                gestureState = currentstate
                transaction.animation = Animation.easeInOut(duration: 2.0)
            }
    }
    Text("highlight!")
        .gesture(longPress)
    Button(...) { ... }
        .accentColor(self.highlight ? .green : .none)                   
}

如何确保从.none重音到.green重音并返回更平滑的过渡？ 目前它切换得相当突然。

Answer 1

.accentColor不是动画修饰符，但是您可以使用以下方法实现相同的效果（据我所知）。

struct TestLongPressGesture: View {
    @GestureState var highlight = false
    var body: some View {
        var longPress: some Gesture {
            LongPressGesture(minimumDuration: 3)
                .updating($highlight) { currentstate, gestureState, transaction in
                    transaction.animation = Animation.easeInOut(duration: 2.0)
                    gestureState = currentstate
                }
        }
        return VStack {
            Text("highlight!")
                .gesture(longPress)
            Divider()
            Button("Button") { }
                .font(Font.largeTitle.bold())
                .foregroundColor(.white)
                .colorMultiply(self.highlight ? .green : .blue)
                .animation(.easeInOut, value: highlight)
        }
    }
}

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