如何在 Jetpack Compose 中为 TextStyle 设置动画？

Question

当某个布尔变量为真时，我的一个 Composable 中的文本会被删除。如何在重新组合时为 TextStyle 中的这种变化设置动画，以便线条淡入而不是突然出现和消失？

@Composable
fun MyComposable(
    completed: Boolean
) {
    val textStyle = TextStyle(textDecoration = if (completed) TextDecoration.LineThrough else null)

    Text(
        text = title,
        color = textColor,
        style = textStyle,
        modifier = Modifier.align(Alignment.CenterVertically)
    )

Answer 1

不确定是否存在为 TextStyle 设置动画的方法。
不是一个很好的解决方案，而只是一种解决方法：

Box() {
    AnimatedVisibility(
        visible = !completed,
        enter = fadeIn(
            animationSpec = tween(durationMillis = duration)
        ),
        exit = fadeOut(
            animationSpec = tween(durationMillis = duration)
        )) {
        Text(
            text = title,
            style = TextStyle(textDecoration=null)
        )
    }
    AnimatedVisibility(
        visible = completed,
        enter = fadeIn(
            animationSpec = tween(durationMillis = duration)
        ),
        exit = fadeOut(
            animationSpec = tween(durationMillis = duration)
        )) {
        Text(
            text = title,
            style = TextStyle(textDecoration = TextDecoration.LineThrough),
        )
    }
}

Answer 2

Gabriele 的回答也是一个不错的解决方法，但也许更简单的方法是将 Text 和“Stroke”放在一个框中，重叠。说，

@Composable
fun MyComposable(
    completed: Boolean
) {

Box{
    Text(
        text = title,
        color = textColor,
        style = textStyle,
        modifier = Modifier.align(Alignment.CenterVertically)
    )
  AnimatedVisibility (completed) {
   Box(Modifier.width(1.dp)){
     //Empty Box of unit width to serve as the stroke
    // Add background modifiers to match the font color
   }
  }
}