vue插件tab选项卡使用小结_javascript技巧

本文实例为大家分享了vue插件tab选项卡的使用方法，供大家参考，具体内容如下

基本用法

<template>
 <tab :options="tabOpt" :state.sync="stateIndex"></tab>
</template>
<script type="text/babel">
 import tab from 'components/tab_touch';
 export default {
  data(){
   tabOpt:undefined,
   stateIndex:0
  },
  components:{
  "tab":tab
  },
  ready(){
   this.tabOpt={
    count: 2.3,
    pin:true,
    htmls:[
     "<span>白日登山</span>",
     "<span>望烽火</span>",
     "<span>黄昏饮马</span>",
     "<span>傍交河</span>",
     "<span>行人刁斗</span>",
     "<span>风沙暗</span>",
     "<span>公主琵琶</span>",
     "<span>幽怨多</span>",
     "<span>野营万里</span>",
     "<span>无城郭</span>",
     "<span>雨雪纷纷</span>",
     "<span>连大漠</span>"
    ],
    slideCallback:function (dex) {
  console.log(dex);
    },
    tabClassName:"tab",
    tabActiveClassName: "active"
   }
  }
 }
</script>

options参数释义

代码

tab.vue

<template>
 <div class="fixWrap">
  <div class="component-tabsWrap" :id="tabsWrapID"
    v-touch:pan="onPan">
   <div class="component-tabs" :style="wrapStyle">
    <div class="component-tab" v-for="item in options.htmls" track-by="$index" :style="'width:'+tWidth+'px'"
      @click.stop="this.state=$index"
      :class="[options.tabClassName,$index==state?options.tabActiveClassName:'']">
     {{{item}}}
    </div>
   </div>
  </div>
 </div>
</template>
<style lang="sass" rel="stylesheet/sass">
 @import "tab.sass"
</style>
<script lang="babel" type="text/babel">
 var VueTouch = require ('vue-touch');
 Vue.use (VueTouch);
 import requestAnimFrame from "utils/requestAnimFrame"
 const sign = (num)=> {
  return num >= 0 ? 1 : -1
 }
 export default {
  props: ["options", "state"],
  data(){
   return {
    tabsWrapID: undefined,//外容器ID
    wrapWidth: "", //外容器宽度
    tWidth: 0, //每一个选项卡应该有多宽
    width: 0, //宽度。
    startTransX: 0,
    transX: 0, //元素样式偏移。
    cssX: 0 //动作中css实际完成的偏移。
   }
  },
  methods: {
   init(){
    this.wrapWidth = document.getElementById (this.tabsWrapID).offsetWidth;
    this.tWidth = this.wrapWidth / this.options.count;
    this.width = this.tWidth * this.options.htmls.length;
    setTimeout(function(){
     this.$el.style["height"]= this.$el.children[0].clientHeight+"px";
    }.bind(this),0)
    if (this.options.pin) {
     var elemRect = this.$el.getBoundingClientRect ();
     var windowOffset = this.getWindowOffset ();
     var winOffsetY = windowOffset.offsetY;
     this.elemOffsetY = elemRect.top + winOffsetY;
     document.addEventListener ('scroll', this.isTop);
    }
   },
   onPan(event){
    if (this.options.disPan) return;
    this.transX = event.deltaX + this.startTransX;
    this.cssX = this.transX;
    if (event.eventType == 4) {
     this.transX = -Math.round (-this.transX / this.tWidth) * this.tWidth; //整格滑动
     var start = null;
     if (this.transX > 0) {
      // 头部回弹
      this.transX = 0;
      var speed = 24;
      requestAnimFrame (step.bind (this));
      function step (timestamp) {
       this.cssX -= speed;
       if (this.cssX > this.transX) requestAnimFrame (step.bind (this));
       else this.startTransX = this.cssX = this.transX;
      };
     }
     else if (this.transX < this.wrapWidth - this.width) {
      // 尾部回弹
      this.transX = this.wrapWidth - this.width;
      var speed = 24;
      requestAnimFrame (step.bind (this));
      function step (timestamp) {
       this.cssX += speed;
       if (this.cssX < this.transX) requestAnimFrame (step.bind (this));
       else this.startTransX = this.cssX = this.transX;
      };
     }
     else {
      //整格落位
      let speed = 6;
      let _sign = sign (this.cssX - this.transX);
      if (_sign * (this.cssX - this.transX) > 1) requestAnimFrame (step.bind (this));
      else this.cssX = this.transX;
      function step (timestamp) {
       if (start === null) start = timestamp;
       let progress = timestamp - start;
       if (progress < 3000) speed *= 1 - progress / 3000;
       this.cssX -= _sign * speed;
       if (_sign * (this.cssX - this.transX) > 1) requestAnimFrame (step.bind (this));
       else this.cssX = this.transX;
      };
     }
     this.startTransX = this.transX; //滑动结束设置下次滑动起始值。
    }

   },
   slideTo(dex){
    this.state = dex;
    let speed = 10;
    // 开头几个
    if (dex + 1 <= this.options.count) {
     this.transX = 0; // 设置应到位置。
     if (this.startTransX < this.transX) {
      let _sign = sign (this.transX - this.startTransX);
      this.cssX = this.transX - _sign * this.tWidth;
      requestAnimFrame (step.bind (this));
      function step () {
       this.cssX += _sign * speed;
       if (_sign * (this.cssX - this.transX) < 0) requestAnimFrame (step.bind (this));
       else {
        this.cssX = this.startTransX = this.transX;
        if (this.options.slideCallback) this.options.slideCallback (dex);
       }
       ;
      };
     }
     //无需动画
     else {
      this.cssX = this.startTransX = this.transX;
      if (this.options.slideCallback) this.options.slideCallback (dex);
     }
    }
    // 结尾几个
    else if (this.options.htmls.length - dex <= this.options.count) {
     this.transX = this.wrapWidth - this.width;// 设置应到位置。
     if (this.startTransX > this.transX) {
      let _sign = sign (this.transX - this.startTransX);
      this.cssX = this.transX - _sign * this.tWidth;
      requestAnimFrame (step.bind (this));
      function step () {
       this.cssX += _sign * speed;
       if (_sign * (this.cssX - this.transX) < 0) requestAnimFrame (step.bind (this));
       else {
        this.cssX = this.startTransX = this.transX;
        if (typeof this.options.slideCallback == "function") this.options.slideCallback (dex);
       }

      };
     }
     else {
      this.cssX = this.startTransX = this.transX; //无需动画
      if (typeof this.options.slideCallback == "function") this.options.slideCallback (dex);
     }
    }
    //中
    else {
     this.transX = -this.tWidth * dex;// 设置应到位置。
     let _sign = sign (this.transX - this.startTransX);
     if (this.tWidth * (dex + 0.5 * (1 - _sign)) + this.startTransX >= 0 && this.tWidth * (dex + 0.5 * (1 - _sign)) + this.startTransX <= this.wrapWidth) {
      //无需动画
      this.cssX = this.transX = this.startTransX;
      if (typeof this.options.slideCallback == "function") this.options.slideCallback (dex);
     }
     else {
      //需要动画
      this.cssX = this.transX - _sign * this.tWidth;
      requestAnimFrame (step.bind (this));
      function step () {
       this.cssX += _sign * speed;
       if (_sign * (this.cssX - this.transX) < 0) requestAnimFrame (step.bind (this));
       else {
        this.cssX = this.startTransX = this.transX;
        if (typeof this.options.slideCallback == "function") this.options.slideCallback (dex);
       }
      };
     }
    }
   },
   isTop(){
    var windowOffset = this.getWindowOffset (),
      winOffsetY = windowOffset.offsetY,
      isTop;
    isTop = this.elemOffsetY <= winOffsetY;
    if (isTop) {
     this.$el.children[0].style['position'] = 'fixed';
     this.$el.children[0].style['top'] = '0';
     this.$el.children[0].style['left'] = '0';
    }
    else {
     this.$el.children[0].style['position']='relative';
    }
    return isTop;
   },
   getWindowOffset(){
    var t;
    var win = window;
    var pageXOffset = (typeof win.pageXOffset == 'number') ? win.pageXOffset : (((t = doc.documentElement) || (t = body.parentNode)) && typeof t.ScrollLeft == 'number' ? t : body).ScrollLeft;
    var pageYOffset = (typeof win.pageYOffset == 'number') ? win.pageYOffset : (((t = doc.documentElement) || (t = body.parentNode)) && typeof t.ScrollTop == 'number' ? t : body).ScrollTop;
    return {
     offsetX: pageXOffset,
     offsetY: pageYOffset
    };
   },
  },
  watch: {
   options(){
    this.tabsWrapID = parseInt (Math.random () * 1e10);
    setTimeout (this.init.bind (this), 10);
   },
   state(val){
    this.slideTo(val)
   }
  },
  computed: {
   wrapStyle(){
    var _str = "";
    if (this.width) _str += `width:${this.width}px;`;//宽度
    _str += `-webkit-transform:translateX(${this.cssX}px);` //位移。
    _str += `transform:translateX(${this.cssX}px);` //位移。
    return _str
   }
  }
 }
</script>
<style lang="sass" rel="stylesheet/sass" type="sass">
.fixWrap
 z-index: 999
 position: relative
.component-tabsWrap
 width: 100%
 overflow: hidden
 min-height: .1rem
 position: relative
 background: #fff
 .component-tabs
 height: 100%
 display: table
 .component-tab
  display: table-cell
  box-sizing: border-box
  text-align: center
  vertical-align: middle
</style>

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