dd_xcx/pages/demo/demo.js

var app = getApp()
var that;
var animation;
Page({
  data: {
    animationInfo:'',
    popupCx:''
  },
  onLoad() {
     that = this;
  },
  onShow() {
    animation = dd.createAnimation({
      duration: 200,
      timeFunction: "linear",
    });
  },
  onOpen(){
    animation.translateY(0).step();
    that.setData({
      animationInfo: animation.export(),
      popupCx: 'container__mask'
    });
  },
  onClose() {
    animation.translateY(1200).step();
    that.setData({
      animationInfo: animation.export(),
      popupCx: ''
    });
  },
});