微信小程序自定义对话框弹出和隐藏动画

//index.js
var app = getApp();
 
let animatiOnShowHeight= 300;
 
Page({
 data:{
 animationData:"",
 showModalStatus:false,
 imageHeight:0,
 imageWidth:0
 },
 imageLoad: function (e) { 
 this.setData({imageHeight:e.detail.height,imageWidth:e.detail.width}); 
 },
 showModal: function () {
 // 显示遮罩层
 var animation = wx.createAnimation({
  duration: 200,
  timingFunction: "linear",
  delay: 0
 })
 this.animation = animation
 animation.translateY(animationShowHeight).step()
 this.setData({
  animationData: animation.export(),
  showModalStatus: true
 })
 setTimeout(function () {
  animation.translateY(0).step()
  this.setData({
  animationData: animation.export()
  })
 }.bind(this), 200)
 },
 hideModal: function () {
 // 隐藏遮罩层
 var animation = wx.createAnimation({
  duration: 200,
  timingFunction: "linear",
  delay: 0
 })
 this.animation = animation;
 animation.translateY(animationShowHeight).step()
 this.setData({
  animationData: animation.export(),
 })
 setTimeout(function () {
 animation.translateY(0).step()
 this.setData({
  animationData: animation.export(),
  showModalStatus: false
 })
 }.bind(this), 200)
 },
 onShow:function(){
  let that = this;
  wx.getSystemInfo({
  success: function(res) {
  animatiOnShowHeight= res.windowHeight;
  }
 })
 },
 
})

 
 
 
 
  
  {{item}}
  
 
 
 
 
 

.buydes-dialog-container{
 width: 100%;
 height: 100%;
 justify-content: space-between;
 background-color:rgba(15, 15, 26, 0.7);
 position: fixed;
 z-index: 999;
}
 
.buydes-dialog-container-top{
 flex-grow: 1;
}
 
.buydes-dialog-container-bottom{
 display: flex;
 flex-grow: 0;
}
 
.buydes-dialog-container-bottom-item{
 padding:24rpx;
 display: flex;
 justify-content: center;
 border-bottom: 1rpx solid #eeeeee;
}