vue3 数据大屏项目开发中，会遇到各种各样的头部，今天整理的是 数据可视化大屏蓝色头部组件 - 数字化管理服务平台 头部组件。

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效果截图

帧动画效果

通过ae实现从左侧到右侧的扫光动画，使用帧动画生成。帧动画虽然增加了效果同时也增加了文件大小。

帧动画文件大小

帧动画图片文件数量74
帧动画图片文件总大小 6M

组件内容

背景加中间标题
加帧动画效果实例

头部大小

1920 * 140

部分代码

/**
* @Author: 858834013@qq.com
* @Name: pageTop
* @Date: 2023年06月22日18:54:43
* @Desc:
*/
<template>
  <div class="pageTop wow fadeInDown">
    <!--    <sequence fileName="topbg31/topbg_" fileLength="74" IntervalTime="50"></sequence>-->
    <div class="left"></div>
    <div class="title">
      <span>{{ title }}</span>
    </div>
    <div class="right"></div>
  </div>
</template>

<script>
import sequence from "@/components/sequence.vue";

export default {
  name: "pageTop",
  components: {sequence},
  data() {
    return {}
  },
  props: {
    title: {
      type: String,
      default() {
        return '监测系统';
      }
    }
  },
  mounted() {

  },
  methods: {}
}
</script>

<style lang="scss" scoped>
.pageTop {
  width: 100%;
  background: url("./assets/bg.png") center top no-repeat;
  background-size: 1920px 140px;
  height: 140px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  flex-wrap: nowrap;
  flex-direction: row;
  align-content: flex-start;
  position: relative;

  .left {
    width: 30%;
    position: relative;
    height: 100%;
  }

  .right {
    width: 30%;
    position: relative;
    height: 100%;
  }

  .title {
    position: relative;
    width: 40%;
    height: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: nowrap;
    flex-direction: row;
    align-content: flex-start;

    span {
      font-size: 30px;
      font-family: Source Han Sans CN;
      font-weight: 800;
      color: #FFFFFF;
      background: linear-gradient(0deg, #00A8FF 0%, #00EAFF 30.322265625%, #00A8FF 66.3818359375%, #00EAFF 98.3642578125%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
  }
}
</style>

帧动画组件封装

通过canvas依次加载动画实现帧动画效果。

<template>
  <canvas ref="animation_canvas" class="animation_canvas" id="animation_canvas"></canvas>
</template>

<script>
import {link} from '@/config/config'
// 序列帧动画
export default {
  name: "sequence",
  data() {
    return {}
  },
  props: {
    // 文件目录
    fileName: {
      type: String,
      default() {
        return 'xuliezhen1/预合成 1_';
      }
    },
    // 文件数量
    fileLength: {
      type: Number,
      default() {
        return 70;
      }
    },
    // 动画间隔
    IntervalTime: {
      type: Number,
      default() {
        return 80;
      }
    },
  },
  mounted() {
    var that = this;
    that.Sequence()
  },
  methods: {
    Sequence() {
      var that = this;
      //初始化参数
      var canvas = null;
      var ctx = null;
      var sources = [];
      //构建图片序列数据
      for (var i = 0; i <= this.fileLength; i++) {
        sources[i] = link + this.fileName + i + '.png';//根据项目修改
      }
      var width = this.$refs.animation_canvas.offsetWidth
      var height = this.$refs.animation_canvas.offsetHeight
      canvas = this.$refs.animation_canvas;
      canvas.width = width;
      canvas.height = height;

      ctx = canvas.getContext("2d");

      //预加载序列图片
      function loadImages(sources, callback) {
        var loadedImages = 0;
        var numImages = 0;
        var images = [];
        // get num of sources
        numImages = sources.length;
        for (var i = 0, len = sources.length; i < len; i++) {
          images[i] = new Image();
          //当一张图片加载完成时执行
          images[i].onload = function () {
            //当所有图片加载完成时，执行回调函数callback
            if (++loadedImages >= numImages) {
              callback(images);
            }
          };
          //把sources中的图片信息导入images数组
          images[i].src = sources[i];
//            console.log(images);
        }
      }

      //播放图片动画
      function playImages(images) {
        var imageNum = images.length;
        var imageNow = 0;
        setInterval(function () {
          ctx.fillStyle = "rgba(0,0,0,0)";
          ctx.clearRect(0, 0, width, height);
          ctx.fillRect(0, 0, width, height);
          ctx.drawImage(images[imageNow], 0, 0, width, height);
          imageNow++;
          if (imageNow >= imageNum) {
            imageNow = 0;
          }
        }, that.IntervalTime)
      }

      //ctx.globalAlpha=0.5
      //执行图片预加载，加载完成后执行main
      loadImages(sources, function (images) {
        playImages(images)
      });
    }
  },
}
</script>

<style lang="scss" scoped>
.animation_canvas {
  position: absolute;
  left: 0;
  top: 0px;
  width: 100%;
  height: 100%;
  z-index: -1;
}
</style>

更多数据可视化大屏顶部组件

vue3 数据可视化大屏顶部组件汇总

源文件下载

文件包括头部效果代码 vue3 vite js nodejs 14

ae扫光动画源文件