const animation = wx.createAnimation({

duration: 1000,

timingFunction: ‘ease-in-out’

});

this.animation = animation;

animation.rotate(180).step();

this.setData({

animationIcon: animation.export()

})

var n = 0;

setInterval(function() {

n = n + 1;

this.animation.rotate(180 * (n + 1)).step()

this.setData({

animationIcon: this.animation.export()

})

}.bind(this), 3000)

我就是想做个3秒旋转一圈的沙漏动画，在模拟上是正常的，3秒会转180°，但是在真机上是一次转好多圈