var cards = utils.getEmptyCards()

for (var card of cards) {

   var animation = wx.createAnimation({

   duration: 0

   }).animation.opacity(0).step()

   card.backAnimation = animation

   card.backAnimationData = animation.export()

}

<view animation="{{item.backAnimationData}}" style="background:black;width:100px;height:100px;">

view>

旋转等别的操作都是可以的

基础库 1.5.3