var timer; 
var inputinfo = ""; 
var app = getApp() 
Page({ 
 data: { 
  animationData:"", 
  showModalStatus:false 
 }, 
  
 onLoad: function () { 
   
 }, 
 showModal: function () { 
  // 显示遮罩层 
  var animation = wx.createAnimation({ 
   duration: 200, 
   timingFunction: "linear", 
   delay: 0 
  }) 
  this.animation = animation 
  animation.translateY(200).step() 
  this.setData({ 
   animationData: animation.export(), 
   showModalStatus: true 
  }) 
  setTimeout(function () { 
   animation.translateY(0).step() 
   this.setData({ 
    animationData: animation.export() 
   }) 
  }.bind(this), 200) 
  console.log("准备执行"); 
   timer = setTimeout(function () { 
    if(this.data.showModalStatus){ 
     this.hideModal(); 
     console.log("是否执行"); 
   } 
  }.bind(this), 3000) 
 }, 
 clickbtn:function(){ 
  if(this.data.showModalStatus){ 
   this.hideModal(); 
  }else{ 
   this.showModal(); 
  } 
 }, 
 hideModal: function () { 
  if(timer != null){ 
   clearTimeout(timer); 
   timer = null; 
  } 
  // 隐藏遮罩层 
  var animation = wx.createAnimation({ 
   duration: 200, 
   timingFunction: "linear", 
   delay: 0 
  }) 
  this.animation = animation 
  animation.translateY(200).step() 
  this.setData({ 
   animationData: animation.export(), 
  }) 
  setTimeout(function () { 
   animation.translateY(0).step() 
   this.setData({ 
    animationData: animation.export(), 
    showModalStatus: false 
   }) 
  }.bind(this), 200) 
 }, 
}) 

<button type="default" bindtap="clickbtn"> 
 点击 
</button> 
<view class="commodity_screen" bindtap="hideModal" wx:if="{{showModalStatus}}"></view> 
<view animation="{{animationData}}" class="commodity_attr_box" wx:if="{{showModalStatus}}"> 
<!--对话框标题--> 
 <view class="title-view"> 
  <view class="toast-view"> 
   要显示的内容 
  </view> 
   
 </view> 
</view>