Vue imitates QQ left slide to delete component function

When a friend was developing a vue project a few days ago, someone reported that there was a problem with the sliding click on IOS. Let us help solve it, so I rewrote the code. Below, I will share the vue imitation qq left-swipe deletion component function to Script House platform, friends who need it can refer to it

A few days ago, when I was developing the Vue project, because the code written by others had a small bug, someone reported that there was something wrong with the sliding click on IOS, so I asked I'm here to help solve it. I looked at the previous code implementation and it was cumbersome and redundant, so I simply re-wrote it myself for your reference. If there is a better way, please feel free to communicate in time~

Let’s take a look at the renderings first. After all, there is no truth without pictures~

Renderings

Implementation ideas

The specific implementation ideas are as follows:

• In terms of layout, I use rem flex layout. For the specific structure and style, please refer to my Code, it is worth noting that the delete button at the end is placed at the end of each row through positioning, and it is hidden beyond the scope.

• The left and right swipes are through touchstart and touchend events. By judging the start and end of the sliding, the offset in the horizontal direction x, if it is greater than a certain threshold, it is considered a left sliding, and if it is less than a certain threshold, it is considered a right sliding. The sliding is changed through the translate offset of the parent li element. My implementation method here is to declare the style in advance and switch the style by changing the type value of the current parent li

• When clicking a certain slider, first determine whether all the current sliders are in the slide-out state. If so, you must first restore the status of all sliders. If not, the click will take effect. Here I am It just pops up an alter. The specific business can be filled in according to the actual situation.

• Deletion is relatively simple. When the slider is drawn, a delete button appears. Click the button to get the current array index value. Through For the splice method of the array, just delete the corresponding array value

Specific implementation

##Html code

<p class="container">
  <p class="page-title">滑动组件</p>
  <ul>
    <li class="list-item " v-for="(item,index) in list " data-type="0">
      <p class="list-box" @touchstart.capture="touchStart" @touchend.capture="touchEnd" @click="skip">
        <img class="list-img lazy"  src="/static/imghwm/default1.png"  data-src="item.imgUrl"   : alt="">
        <p class="list-content">
          <p class="title">{{item.title}}</p>
          <p class="tips">{{item.tips}}</p>
          <p class="time">{{item.time}}</p>
        </p>
      </p>
      <p class="delete" @click="deleteItem" :data-index="index">删除</p>
    </li>
  </ul>
</p>

Note: The data here are all local mock~

Css style Code

.page-title{
  text-align: center;
  font-size: 17px;
  padding: 10px 15px;
  position: relative;
}
.page-title:after{
  content: " ";
  position: absolute;
  left: 0;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1px solid #ccc;
  color: #ccc;
  -webkit-transform-origin: 0 100%;
  transform-origin: 0 100%;
  -webkit-transform: scaleY(0.5);
  transform: scaleY(0.5);
  z-index: 2;
}
.list-item{
  position: relative;
  height: 1.6rem;
  -webkit-transition: all 0.2s;
  transition: all 0.2s;
}
.list-item[data-type="0"]{
  transform: translate3d(0,0,0);
}
.list-item[data-type="1"]{
  transform: translate3d(-2rem,0,0);
}
.list-item:after{
  content: " ";
  position: absolute;
  left: 0.2rem;
  bottom: 0;
  right: 0;
  height: 1px;
  border-bottom: 1px solid #ccc;
  color: #ccc;
  -webkit-transform-origin: 0 100%;
  transform-origin: 0 100%;
  -webkit-transform: scaleY(0.5);
  transform: scaleY(0.5);
  z-index: 2;
}
.list-box{
  padding: 0.2rem;
  background: #fff;
  display: flex;
  align-items: center;
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
  justify-content: flex-end;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  font-size: 0;
}
.list-item .list-img{
  display: block;
  width: 1rem;
  height: 1rem;
}
.list-item .list-content{
  padding: 0.1rem 0 0.1rem 0.2rem;
  position: relative;
  flex: 1;
  flex-direction: column;
  align-items: flex-start;
  justify-content: center;
  overflow: hidden;
}
.list-item .title{
  display: block;
  color: #333;
  overflow: hidden;
  font-size: 15px;
  font-weight: bold;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list-item .tips{
  display: block;
  overflow: hidden;
  font-size: 12px;
  color: #999;
  line-height: 20px;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list-item .time{
  display: block;
  font-size: 12px;
  position: absolute;
  right: 0;
  top: 0.1rem;
  color: #666;
}
.list-item .delete{
  width: 2rem;
  height: 1.6rem;
  background: #ff4949;
  font-size: 17px;
  color: #fff;
  text-align: center;
  line-height: 1.6rem;
  position: absolute;
  top:0;
  right: -2rem;
}

This is the core style code, and some style reset code is placed in App.vue, by calculating the root node html I put the font size script in index.html~

js code

export default{
 name: 'index',
 data () {
 return {
  list : [
  {
   title : 'Chrome更新了' ,
   imgUrl : './static/images/Chrome.png' ,
   tips : '不再支持Flash视频播放' ,
   time : '上午 8:30'
  },
  {
   title : '电影新资讯' ,
   imgUrl : './static/images/Sina.png' ,
   tips : '电影《红海行动》上映以来票房暴涨，很多国人表示对国产电影有了新的改观' ,
   time : '上午 12:00'
  },
        {
   title : '聚焦两会·共筑中国梦' ,
   imgUrl : './static/images/video.png' ,
   tips : '习近平代表的两会故事' ,
   time : '下午 17:45'
        },
        {
   title : '微信团队' ,
   imgUrl : './static/images/Wechat.png' ,
   tips : '您的帐号有异常登录，如非本人操作，请及时修改密码' ,
   time : '昨天'
        }
  ],
  startX : 0 ,
  endX : 0 ,
 }
 },
 methods : {
 //跳转
 skip(){
  if( this.checkSlide() ){
  this.restSlide();
      }else{
  alert('You click the slide!')
      }
 },
 //滑动开始
 touchStart(e){
   // 记录初始位置
  this.startX = e.touches[0].clientX;
 },
 //滑动结束
 touchEnd(e){
            // 当前滑动的父级元素
  let parentElement = e.currentTarget.parentElement;
  // 记录结束位置
  this.endX = e.changedTouches[0].clientX;
            // 左滑
  if( parentElement.dataset.type == 0 && this.startX - this.endX > 30 ){
  this.restSlide();
  parentElement.dataset.type = 1;
  }
            // 右滑
  if( parentElement.dataset.type == 1 && this.startX - this.endX < -30 ){
  this.restSlide();
  parentElement.dataset.type = 0;
  }
  this.startX = 0;
  this.endX = 0;
 },
    //判断当前是否有滑块处于滑动状态
    checkSlide(){
  let listItems = document.querySelectorAll(&#39;.list-item&#39;);
  for( let i = 0 ; i < listItems.length ; i++){
  if( listItems[i].dataset.type == 1 ) {
   return true;
        }
  }
  return false;
    },
 //复位滑动状态
 restSlide(){
  let listItems = document.querySelectorAll(&#39;.list-item&#39;);
             // 复位
  for( let i = 0 ; i < listItems.length ; i++){
  listItems[i].dataset.type = 0;
  }
 },
 //删除
 deleteItem(e){
   // 当前索引
  let index = e.currentTarget.dataset.index;
  // 复位
  this.restSlide();
  // 删除
  this.list.splice(index,1);
 }
 }
}

The js code is just this, each function There are comments and explanations, I believe everyone can understand them, so I won’t explain them too much.

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

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