/*CSS动画*/
@keyframes opacityInUi
  from
    opacity 0
  to
    opacity 1
@keyframes opacityOutUi
  from
    opacity 1
  to
    opacity 0

.opacityInUiOut-enter-active
  animation opacityInUi .3s
.opacityInUiOut-leave-active
  animation opacityOutUi .3s