vue视频时间进度条组件如何使用

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有些视频是以视频流的形式进行渲染的，没有视频滚动条，所以就写了24h的时间组件

实现思路：

24h的时间刻度线总宽度为12960px
2、点击24h线的某一点，获取这一点离左侧原点的距离（使用dom元素layerX和offsetLeft综合判断）
3、计算点击时线段的占比比率
4、每天的时间是86400000毫秒
5、占比比率乘以86400000就是获取的你点击的时间

代码如下：

<template>  <div class="time-main">    <div class="center-content" ref="centerRef">      <div        ref="timeRef"        class="time-line"        @click.capture="clickTimeLine($event)"      >        <template v-for="(item, i) in timeArr">          <div            :key="'a' + i"            class="base-line"            :          ></div>          <div :key="i" class="base-title" :>            {{ item }}          </div>          <div            :key="'b' + i"            class="base-line"            :          ></div>          <div            :key="'c' + i"            class="base-line"            :          ></div>          <div            :key="'d' + i"            class="base-line"            :          ></div>          <div            :key="'e' + i"            class="base-line"            :          ></div>        </template>      </div>    </div>    <div class="btn-content">      <div class="left-arow" @click="clickRightMove">        <i class="el-icon-arrow-left"></i>      </div>      <div>{{ yesterdayTime | formatDateTime }}</div>      <div class="right-arow" @click="clickLeftMove">        <i class="el-icon-arrow-right"></i>      </div>    </div>  </div></template><script>import {  compare,  exactDiv,  exactMul,  exactSub,  exactAdd,  decimalsFormat,} from "@/util/util.js";export default {  name: "timeLine",  // inject: ["screenNum"],  // watch: {  //   screenNum: {  //     handler(val) {  //       console.log("切换了val==", val);  //     },  //   },  // },  props: {    dateArr: {      type: Array,    },  },  data() {    return {      clickCnt: 0,      leftMoveWidth: 0,      endTimeFlag: false,      timeArr: [        "00:00",        "00:10",        "00:20",        "00:30",        "00:40",        "00:50",        "01:00",        "01:10",        "01:20",        "01:30",        "01:40",        "01:50",        "02:00",        "02:10",        "02:20",        "02:30",        "02:40",        "02:50",        "03:00",        "03:10",        "03:20",        "03:30",        "03:40",        "03:50",        "04:00",        "04:10",        "04:20",        "04:30",        "04:40",        "04:50",        "05:00",        "05:10",        "05:20",        "05:30",        "05:40",        "05:60",        "06:00",        "06:10",        "06:20",        "06:30",        "06:40",        "06:50",        "07:00",        "07:10",        "07:20",        "07:30",        "07:40",        "07:50",        "08:00",        "08:10",        "08:20",        "08:30",        "08:40",        "08:50",        "09:00",        "09:10",        "09:20",        "09:30",        "09:40",        "09:50",        "10:00",        "10:10",        "10:20",        "10:30",        "10:40",        "10:50",        "11:00",        "11:10",        "11:20",        "11:30",        "11:40",        "11:50",        "12:00",        "12:10",        "12:20",        "12:30",        "12:40",        "12:50",        "13:00",        "13:10",        "13:20",        "13:30",        "13:40",        "13:50",        "14:00",        "14:10",        "14:20",        "14:30",        "14:40",        "14:50",        "15:00",        "15:10",        "15:20",        "15:30",        "15:40",        "15:50",        "16:00",        "16:10",        "16:20",        "16:30",        "16:40",        "16:50",        "17:00",        "17:10",        "17:20",        "17:30",        "17:40",        "17:50",        "18:00",        "18:10",        "18:20",        "18:30",        "18:40",        "18:50",        "19:00",        "19:10",        "19:20",        "19:30",        "19:40",        "19:50",        "20:00",        "20:10",        "20:20",        "20:30",        "20:40",        "20:50",        "21:00",        "21:10",        "21:20",        "21:30",        "21:40",        "21:50",        "22:00",        "22:10",        "22:20",        "22:30",        "22:40",        "22:50",        "23:00",        "23:10",        "23:20",        "23:30",        "23:40",        "23:50",      ],      switchWidthNum: 540,      yesterdayTime: 0,      clickTimeVal: 0,    };  },  mounted() {    // this.handleWidthFn();    this.dealScrollMove();    // console.log("mounted==", this.dateArr);  },  methods: {    dealScrollMove() {      if (this.$refs.centerRef.offsetWidth >= 540) {        this.switchWidthNum = 540;      } else if (this.$refs.centerRef.offsetWidth >= 360) {        this.switchWidthNum = 360;      } else if (this.$refs.centerRef.offsetWidth >= 270) {        this.switchWidthNum = 270;      } else if (this.$refs.centerRef.offsetWidth >= 180) {        this.switchWidthNum = 180;      } else {        this.switchWidthNum = 90;      }      let time0 = new Date(new Date().toLocaleDateString()).getTime(); //获取当日0点时间戳      let time1 = new Date().getTime(); // 当前时间      let sumTimeWidth = 12960;      let dayTimeSum = 86400000; //一天的毫秒数      // if (this.clickTimeVal) {      //   time1 = this.clickTimeVal;      //   console.log("进==", time1);      //   console.log("进=2=", this.clickTimeVal);      // }      if (this.dateArr.length > 0) {        time1 = this.dateArr[0];        time0 = exactSub(time0, dayTimeSum);        console.log("进==", this.dateArr);        console.log("进=2=", this.clickTimeVal);      }      let timeSub = exactSub(time1, time0);      // console.log("timeSub=", timeSub);      if (this.dateArr.length > 0) {        this.yesterdayTime = this.dateArr[0];        this.clickTimeVal = this.dateArr[0];      } else {        this.yesterdayTime = exactSub(time0, dayTimeSum);      }      let dayPer = exactDiv(timeSub, dayTimeSum); //一天的百分比      console.log("exactDiv(timeSub, dayTimeSum)==", this.yesterdayTime);      // console.log("dayPer==", dayPer);      let scrollWidth = exactMul(sumTimeWidth, dayPer);      // console.log("scrollWidth=333333=", scrollWidth);      // console.log("scrollWidth=33333555553=", this.switchWidthNum);      // 除以switchWidthNum 获取点击的个数      let switchClickCnt = exactDiv(scrollWidth, this.switchWidthNum);      // console.log("switchClickCnt==", switchClickCnt);      this.clickCnt = parseInt(switchClickCnt) - 1;      this.clickLeftMove();      // console.log("点击的数量1===", this.clickCnt);    },    handleWidthFn() {      this.$nextTick(() => {        if (this.$refs.centerRef.offsetWidth >= 540) {          this.switchWidthNum = 540;        } else if (this.$refs.centerRef.offsetWidth >= 360) {          this.switchWidthNum = 360;        } else if (this.$refs.centerRef.offsetWidth >= 270) {          this.switchWidthNum = 270;        } else if (this.$refs.centerRef.offsetWidth >= 180) {          this.switchWidthNum = 180;        } else {          this.switchWidthNum = 90;        }      });    },    clickTimeLine(event) {      // console.log("event==", event);      // console.log("event=layerX==", event.layerX);      // console.log("event=layerX=target===", event.target.offsetLeft);      let sumTimeWidth = 12960;      let dayTimeSum = 86400000; //一天的毫秒数      let time0 = new Date(new Date().toLocaleDateString()).getTime(); //获取当日0点时间戳      let yesterdayTime = exactSub(time0, dayTimeSum);      let timePointNum = 0;      // className: "time-line"      if (event.target.className == "time-line") {        timePointNum = event.layerX;      } else {        timePointNum = exactAdd(event.layerX, event.target.offsetLeft);      }      let timemove = exactAdd(timePointNum, this.leftMoveWidth);      let timePer = exactDiv(timemove, sumTimeWidth); // 点击的百分比      let clickTimeNum = exactMul(dayTimeSum, timePer); //      let trueTimeNum = exactAdd(clickTimeNum, yesterdayTime); // time      let fomretTime = parseInt(trueTimeNum);      this.clickTimeVal = new Date(fomretTime).getTime();      this.$emit(        "handleClickTimeLineFn",        new Date(fomretTime)      );      // console.log("trueTimeNum==", trueTimeNum);      // console.log("fomretTime==", fomretTime);      // console.log("new Date==", new Date(fomretTime));    },    clickLeftMove() {      // console.log("点击的数量==2=", this.clickCnt);      this.handleWidthFn();      // console.log("this.$refs.centerRef==", this.$refs.centerRef);      // console.log("centerRef=offsetWidth=", this.$refs.centerRef.offsetWidth);      // console.log("centerRef=clientWidth=", this.$refs.centerRef.clientWidth);      if (this.endTimeFlag) {        return;      }      this.clickCnt++;      this.leftMoveWidth = this.clickCnt * this.switchWidthNum;      let letWidth = this.clickCnt * this.switchWidthNum + "px";      // console.log(this.clickCnt);      // console.log("this.$refs.timeRef==", this.$refs.timeRef);      if (this.leftMoveWidth + this.$refs.centerRef.offsetWidth > 12960) {        letWidth = 12960 - this.$refs.centerRef.offsetWidth + "px";        this.endTimeFlag = true;      } else {        this.endTimeFlag = false;      }      this.$refs.timeRef.style.transform = "translateX(-" + letWidth + ")";      this.$refs.timeRef.style.transition = "all 0.5s";    },    clickRightMove() {      this.handleWidthFn();      if (this.clickCnt > 0) {        this.clickCnt--;      }      this.leftMoveWidth = this.clickCnt * this.switchWidthNum;      let letWidth = this.clickCnt * this.switchWidthNum + "px";      // console.log(this.clickCnt);      // console.log("this.$refs.timeRef==", this.$refs.timeRef);      if (this.endTimeFlag) {        this.endTimeFlag = false;      }      this.$refs.timeRef.style.transform = "translateX(-" + letWidth + ")";      this.$refs.timeRef.style.transition = "all 0.5s";    },  },};</script><style scoped lang="scss">.time-main {  position: relative;  width: 100%;  margin: auto;  overflow: hidden;  // display: flex;  //   border: 1px solid red;}.center-content {  width: calc(100% - 30px);  margin-left: 30px;  overflow: hidden;}.btn-content {  width: calc(100% - 30px);  margin-left: 30px;  display: flex;  justify-content: space-between;  color: #fff;}.time-line {  position: relative;  font-size: 12px;    //   left: 30px;  height: 19px;  width: 12960px;  border-bottom: 1px solid rgb(90, 90, 90);  margin: 0px;  padding: 0px;  transition: left 0.9s ease 0s;  color: #fff;  z-index: 10;  &:hover {    cursor: pointer;  }  .base-title {    position: absolute;    left: 4px;    bottom: 3px;    color: #fff;    z-index: -1;  }}.base-line {  position: absolute;  width: 1px;  height: 4px;  bottom: 0px;  background-color: rgb(90, 90, 90);  z-index: 9;}.left-arow {  // position: absolute;  // left: 2%;  color: #fff;  font-size: 20px;}.right-arow {  // position: absolute;  // right: 2%;  color: #fff;  font-size: 20px;}</style>

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