使用 Swift UI 长按动画

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)                   
}

我如何确保从.none重音到.green重音和后退的过渡更加平滑？目前它切换得相当突然。

Answer 1

修饰符.accentColor不可设置动画，但是您可以使用以下方法实现相同的效果（据我了解）。

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)
        }
    }
}