위 챗 애플 릿 은 틱 톡 영상의 전체 화면 상하 전환 기능 의 실현 코드 를 모방 합 니 다.

<view class="video_box">
 <view bindtouchend="touchEnd" id="myVideo{{index}}" animation="{{animation}}" bindtouchstart="touchStart" bindtouchmove="touchMove" class="video_list" wx:for="{{video_list}}" data-index="{{index}}" wx:key="index" >
  <text style="color:red;font-size:30px;display:block;">{{index}}</text>
  <video custom-cache="{{false}}" src="{{item.video_src}}" vslide-gesture-in-fullscreen="{{false}}" direction = '{{0}}' enable-progress-gesture="{{false}}" show-fullscreen-btn="{{false}}" object-fit="cover"></video>
 </view>
</view>

.video_box{width: 100%;height: auto;position: fixed;top:0;bottom: 0;background-color: #000;}
.video_list{width: 100%;height: 100vh;position: relative;}
.video_list video{position: absolute;top:50%;margin-top:-30vw; width: 100%;height:56vw;padding: 0;}

Page({
 /**
  *        
  */
 data: {
  video_list:[
   {video_src:'https://stream7.iqilu.com/10339/upload_transcode/202002/18/20200218093206z8V1JuPlpe.mp4'},
   {video_src:'https://stream7.iqilu.com/10339/article/202002/17/c292033ef110de9f42d7d539fe0423cf.mp4'},
   {video_src:'https://stream7.iqilu.com/10339/upload_transcode/202002/18/20200218025702PSiVKDB5ap.mp4'},
   {video_src:'https://stream7.iqilu.com/10339/article/202002/18/2fca1c77730e54c7b500573c2437003f.mp4'},
   {video_src:'https://stream7.iqilu.com/10339/upload_transcode/202002/18/20200218093206z8V1JuPlpe.mp4'},
   {video_src:'https://stream7.iqilu.com/10339/upload_transcode/202002/18/20200218114723HDu3hhxqIT.mp4'},
   {video_src:'https://stream7.iqilu.com/10339/upload_transcode/202002/18/20200218025702PSiVKDB5ap.mp4'},
   {video_src:'https://stream7.iqilu.com/10339/article/202002/17/c292033ef110de9f42d7d539fe0423cf.mp4'},
   {video_src:'https://stream7.iqilu.com/10339/upload_transcode/202002/18/20200218093206z8V1JuPlpe.mp4'},
   {video_src:'https://stream7.iqilu.com/10339/upload_transcode/202002/18/20200218114723HDu3hhxqIT.mp4'},
  ],
  pageY:'',    //         
  animation:'',  //       
  up_stroke:false,// ture:  ；false：  
  difference:'', //      
  windowHeight:'',//     
 },
 /**
  *       --      
  */
 onLoad: function (options) {
  //   ：    、
  this.setData({
   windowHeight:wx.getSystemInfoSync().windowHeight
  })
 },
 //         
 touchStart(e){
  //     
  this.setData({
   pageY:e.touches[0].pageY,
  })
 },
 //         
 touchMove(e){
  let n = e.currentTarget.dataset.index;   //         
  let difference = e.touches[0].pageY - this.data.pageY; //           
  if(this.is_continue(n,difference)){    //       
   return;
  } 
  //      -------------------------------------
  var animation = wx.createAnimation({    //     
   duration: 0,
  });
  animation.top(difference - (n*this.data.windowHeight)).step()
  this.setData({
   animation: animation.export(),     //   
   up_stroke:difference > 0 ? false : true, //     ,
   difference:difference,          //      
  })
 },
 //         
 touchEnd(e){
  let n = e.currentTarget.dataset.index;
  let difference = this.data.difference; //      
  if(this.is_continue(n,difference)){
   return;
  }
  const windowHeight = this.data.windowHeight;   //     
  let that = this;
  //   id           
  var query = wx.createSelectorQuery();
  let id = '#' + e.currentTarget.id;
  query.select(id).boundingClientRect(function (rect) { //     
   if(Math.abs(difference) <= windowHeight /7){   //   1/7     ---------------------------
    var animation = wx.createAnimation({ //     
     duration: 100,
    });
    animation.top(-(n * windowHeight)).step()
    that.setData({
     animation: animation.export(),
     up_stroke:false, //       
     difference:0,   //       
    })
   }else{ //   1/4，           --------------------------------
    var animation = wx.createAnimation({ //     
     duration: 200,
    });
    that.data.up_stroke ? n++ : n--;   //   ：n+1   ：n-1
    animation.top(-(n * windowHeight)).step()
    that.setData({
     animation: animation.export(),
     up_stroke:false, //       
     difference:0,   //       
    })
   }
  }).exec();
 },
 //       
 is_continue(n,difference){
  if(difference < 0){ //   
   if(n == this.data.video_list.length - 1){ //       ，    
    if(difference < -20){
     wx.showToast({
      title: '     ~~',
      icon:'none',
      duration:1000
     })
    }
    return true;
   }
  }else{
   if(n == 0){
    if(difference > 20){
     wx.showToast({
      title: '     ~~',
      icon:'none',
      duration:1000
     })
    }
    return true;
   }
  }
 },
})