在
spring
中使用animationSpec
类型AnimatedVisibility
时如何设置持续时间?
AnimatedVisibility(
enter = fadeIn(
animationSpec = spring(stiffness = Spring.StiffnessMediumLow)
),
exit = fadeOut(
animationSpec = spring(stiffness = Spring.StiffnessMediumLow)
),
...
) {
...
}
在 Jetpack compose 中,当使用 spring 作为animationSpec 时,您不需要直接设置持续时间,因为 Spring 动画是由阻尼、刚度和质量等物理属性控制的,而不是由持续时间控制的。但是,您可以通过以下方式操纵动画的时间调整刚度和阻尼比。
AnimatedVisibility(
enter = fadeIn(
animationSpec = spring(
stiffness = Spring.StiffnessLow, // Lower stiffness for slower animation
dampingRatio = Spring.DampingRatioMediumBouncy // Adjust damping for bounce effect
)
),
exit = fadeOut(
animationSpec = spring(
stiffness = Spring.StiffnessHigh, // Higher stiffness for faster animation
dampingRatio = Spring.DampingRatioNoBouncy // Less bounce for faster exit
)
),
)
如果您需要精确控制时间,请考虑使用补间或关键帧而不是弹簧,因为它们允许您设置以毫秒为单位的持续时间。
AnimatedVisibility(
enter = fadeIn(
animationSpec = tween(durationMillis = 1000) // 1 second duration
),
exit = fadeOut(
animationSpec = tween(durationMillis = 500) // 0.5 second duration
),)