vue iview多张图片大图预览、缩放翻转

2024-02-01 17:47:06

本文实例为大家分享了vue iview多张图片大图预览，可缩放翻转，供大家参考，具体内容如下

先看效果：

具体代码如下：

<style lang="less">
@import "../advanced-router.less";
</style>

<template>
 <div class="balance-accounts">
  <Row class-name="detail-row">
   <Card>
    <p slot="title">
     回单照片
    </p>
    <div class="demo-upload-list" v-for="(item,index) in opPicsList" :key="index">
     <img :src="item.url">
     <div class="demo-upload-list-cover">
      <Icon type="ios-search-strong" @click.native="handleView(item.name)"></Icon>
     </div>
    </div>
   </Card>
  </Row>
 </div>
</template>
<script>
import * as API from "@/api/adminApi";
import iconLeft from "@/images/icon-left.png";
import iconRight from "@/images/icon-right.png";
import iconClose from "@/images/icon-close.png";
import iconRotate from "@/images/icon-rotate.png";
import iconNoImages from "@/images/icon-no-images.png";

export default {
 name: "shopping-info",
 data() {
 return {
  opPicsList: [
  {
   name: "none",
   url: iconNoImages
  }
  ],
  bigImage: null,
  currentImageName: "",
  currentRotate: 0
 };
 },
 props: ['imageList'],
 methods: {
 loadDetail() {
  let vm = this;
  API.getFundClearDetail({ orderId: this.$route.query.orderId }).then(
  data => {
   if (data.resultObj.detail) {
   if (data.resultObj.detail.opPics.length > 0) {
    vm.opPicsList.splice(0, vm.opPicsList.length);
    data.resultObj.detail.opPics
    .split(",")
    .forEach((element, index) => {
     vm.opPicsList.push({
     name: index,
     url: element
     });
    });
   }
   }
  }
  );
 },
 rollImg() {
  /* 获取当前页面的缩放比
   若未设置zoom缩放比，则为默认100%，即1，原图大小
  */
  var zoom = parseInt(this.bigImage.style.zoom) || 100;
  /* event.wheelDelta 获取滚轮滚动值并将滚动值叠加给缩放比zoom
   wheelDelta统一为±120，其中正数表示为向上滚动，负数表示向下滚动
  */
  zoom += event.wheelDelta / 12;
  /* 如果缩放比大于0，则将缩放比加载到页面元素 */
  if (zoom >= 100) {
  this.bigImage.style.zoom = zoom + "%";
  }
  /* 如果缩放比不大于0，则返回false，不执行操作 */
  return false;
 },
 handleView(name) {
  if (this.opPicsList[0].name == "none") {
  this.$Message.error("没有图片哦~");
  return;
  }
  this.currentImageName = name;

  let elementArr = document.getElementsByClassName("showBigImage");
  if (elementArr.length == 0) {
  this.createShowImage();
  }
  for (let y = 0; y < this.opPicsList.length; y++) {
  if (name == this.opPicsList[y].name) {
   document.getElementById("bigImageE").src = this.opPicsList[y].url;
   break;
  }
  }
 },
 closeImageShow() {
  let elementArr = document.getElementsByClassName("showBigImage");
  let main = document.getElementsByClassName("main");
  let count = elementArr.length;
  for (let i = 0; i < count; i++) {
  main[0].removeChild(elementArr[0]);
  }
 },
 rotateImage() {
  let imageE = document.getElementById("bigImageE");
  this.currentRotate = (this.currentRotate + 90) % 360;
  imageE.style.transform =
  imageE.style.transform.split(" ")[0] +
  " rotate(" +
  this.currentRotate +
  "deg)";
 },
 toLeftImage() {
  for (let y = 0; y < this.opPicsList.length; y++) {
  if (this.currentImageName == this.opPicsList[y].name) {
   if (y - 1 < 0) {
   this.$Message.info("已经是最左边的一张图了哦~");
   } else {
   this.currentImageName = this.opPicsList[y - 1].name;
   let imageE = document.getElementById("bigImageE");
   imageE.src = this.opPicsList[y - 1].url;
   // 加载完成执行
   imageE.onload = function() {
    if (imageE.naturalHeight < window.innerHeight) {
    //图片高度小于屏幕则需要垂直居中处理
    imageE.style.height = imageE.naturalHeight + "px";
    imageE.style.top = "50%";
    imageE.style.position = "relative";
    imageE.style.transform = "translateY(-50%)";
    imageE.style.zoom = "100%";
    } else {
    //需要去除前一张图片的效果
    imageE.style.height = window.innerHeight + "px";
    imageE.style.top = "0";
    imageE.style.position = "relative";
    imageE.style.transform = "translateY(0%)";
    imageE.style.zoom = "100%";
    }
   };
   }
   break;
  }
  }
 },
 toRightImage() {
  for (let y = 0; y < this.opPicsList.length; y++) {
  if (this.currentImageName == this.opPicsList[y].name) {
   if (y + 1 == this.opPicsList.length) {
   this.$Message.info("已经是最右边的一张图了哦~");
   } else {
   this.currentImageName = this.opPicsList[y + 1].name;
   let imageE = document.getElementById("bigImageE");
   imageE.src = this.opPicsList[y + 1].url;
   // 加载完成执行
   imageE.onload = function() {
    if (imageE.naturalHeight < window.innerHeight) {
    //图片高度小于屏幕则需要垂直居中处理
    imageE.style.height = imageE.naturalHeight + "px";
    imageE.style.top = "50%";
    imageE.style.position = "relative";
    imageE.style.transform = "translateY(-50%)";
    imageE.style.zoom = "100%";
    } else {
    //需要去除前一张图片的效果
    imageE.style.height = window.innerHeight + "px";
    imageE.style.top = "0";
    imageE.style.position = "relative";
    imageE.style.transform = "translateY(0%)";
    imageE.style.zoom = "100%";
    }
   };
   }
   break;
  }
  }
 },
 createShowImage() {
  //创建图片显示
  let main = document.getElementsByClassName("main");
  let topContainer = document.createElement("div");
  let scrollContainer = document.createElement("div");
  topContainer.style.position = "fixed";
  topContainer.style.zIndex = "80";
  topContainer.style.background = "rgba(0,0,0,0.80)";
  topContainer.style.height = "100%";
  topContainer.style.width = "100%";
  topContainer.style.textAlign = "center";
  topContainer.className = "showBigImage";

  let imageContainer = document.createElement("div");
  imageContainer.style.width = window.innerWidth + "px";
  imageContainer.style.height = window.innerHeight + "px";
  imageContainer.style.margin = "0 auto";
  imageContainer.style.overflow = "auto";
  imageContainer.style.top = "50%";
  imageContainer.style.position = "relative";
  imageContainer.style.transform = "translateY(-50%)";

  let imageE = document.createElement("img");
  imageE.src = iconNoImages;
  imageE.title = "鼠标滚轮滚动可缩放图片";
  imageE.id = "bigImageE";
  // 加载完成执行
  imageE.onload = function() {
  if (imageE.naturalHeight < window.innerHeight) {
   //图片高度小于屏幕则需要垂直居中处理
   // imageE.style.width = "100%";
   imageE.style.top = "50%";
   imageE.style.position = "relative";
   imageE.style.transform = "translateY(-50%)";
  } else {
   imageE.style.height = window.innerHeight + "px";
  }
  };

  this.bigImage = imageE;

  //添加鼠标滚轮事件缩放图片
  if (imageE.addEventListener) {
  // IE9, Chrome, Safari, Opera
  imageE.addEventListener("mousewheel", this.rollImg, false);
  // Firefox
  imageE.addEventListener("DOMMouseScroll", this.rollImg, false);
  } else {
  // IE 6/7/8
  imageE.attachEvent("onmousewheel", this.rollImg);
  }
  imageContainer.appendChild(imageE);
  topContainer.appendChild(imageContainer);

  main[0].appendChild(topContainer);

  //创建点击左右浏览按钮
  //左按钮
  let imgLeft = document.createElement("img");
  imgLeft.src = iconLeft;
  imgLeft.style.zIndex = "101";
  imgLeft.style.position = "fixed";
  imgLeft.style.top = "50%";
  imgLeft.style.transform = "translateY(-50%)";
  imgLeft.style.left = "12%";
  imgLeft.style.cursor = "pointer";
  imgLeft.className = "showBigImage";
  //添加鼠标点击事件切换图片
  imgLeft.addEventListener("click", this.toLeftImage);
  //右按钮
  let imgRight = document.createElement("img");
  imgRight.src = iconRight;
  imgRight.style.zIndex = "101";
  imgRight.style.position = "fixed";
  imgRight.style.top = "50%";
  imgRight.style.transform = "translateY(-50%)";
  imgRight.style.right = "12%";
  imgRight.style.cursor = "pointer";
  imgRight.className = "showBigImage";
  //添加鼠标点击事件切换图片
  imgRight.addEventListener("click", this.toRightImage);

  //大图片选转
  let imgRotate = document.createElement("img");
  imgRotate.id = "rotateImageBtn";
  imgRotate.src = iconRotate;
  imgRotate.style.zIndex = "102";
  imgRotate.style.position = "fixed";
  imgRotate.style.top = "5%";
  imgRotate.style.right = "5%";
  imgRotate.style.transform = "translateY(-50%)";
  imgRotate.style.cursor = "pointer";
  imgRotate.className = "showBigImage";
  //添加鼠标点击事件旋转大图
  imgRotate.addEventListener("click", this.rotateImage);

  //关闭按钮
  let imgClose = document.createElement("img");
  imgClose.src = iconClose;
  imgClose.style.zIndex = "101";
  imgClose.style.position = "fixed";
  imgClose.style.top = "5%";
  imgClose.style.right = "1%";
  imgClose.style.transform = "translateY(-50%)";
  imgClose.style.cursor = "pointer";
  imgClose.className = "showBigImage";
  //添加鼠标点击事件关闭显示大图
  imgClose.addEventListener("click", this.closeImageShow);

  main[0].appendChild(imgLeft);
  main[0].appendChild(imgRight);
  main[0].appendChild(imgClose);
  main[0].appendChild(imgRotate);

 }
 },
 mounted() {
 this.loadDetail();
 }
};
</script>

可以看到，这个图片大图预览是用js创建的，而且是在main元素下添加的元素。因为这个是在ivew-admin框架下写的，其主要内容区的z-index是比菜单和header小的，所以如果在内容去写这个图片全局预览阴影区域无法覆盖整个页面。所以需要在main下加入元素。

组件方式：

<template>
 <div>
 </div>
</template>
<script>
import iconLeft from "@/images/icon-left.png";
import iconRight from "@/images/icon-right.png";
import iconClose from "@/images/icon-close.png";
import iconRotate from "@/images/icon-rotate.png";
import iconNoImages from "@/images/icon-no-images.png";
import {IMAGE_URL_PREFIX} from "@/config/constant";
export default {
 data() {
 return {
  opPicsList: [
  {
   name: "none",
   url: iconNoImages
  }
  ],
  imgName: "",
  bigImage: null,
  currentImageName: "",
  currentRotate: 0
 };
 },
 props: {
 },
 methods: {
 loadImages(opPics) {
  this.opPicsList.splice(0, this.opPicsList.length);
  opPics.split(",").forEach((element, index) => {
  this.opPicsList.push({
   name: index,
   url: IMAGE_URL_PREFIX + element
  });
  });
  this.handleView("0");
 },
 rollImg() {
  /* 获取当前页面的缩放比
   若未设置zoom缩放比，则为默认100%，即1，原图大小
  */

  var zoom = parseInt(this.bigImage.style.zoom) || 100;
  /* event.wheelDelta 获取滚轮滚动值并将滚动值叠加给缩放比zoom
   wheelDelta统一为±120，其中正数表示为向上滚动，负数表示向下滚动
  */
  zoom += event.wheelDelta / 12;
  /* 如果缩放比大于0，则将缩放比加载到页面元素 */
  if (zoom >= 100) {
  this.bigImage.style.zoom = zoom + "%";
  }
  /* 如果缩放比不大于0，则返回false，不执行操作 */
  return false;
 },
 handleView(name) {
  if (this.opPicsList[0].name == "none") {
  this.$Message.error("没有图片哦~");
  return;
  }
  this.currentImageName = name;

  let elementArr = document.getElementsByClassName("showBigImage");
  if (elementArr.length == 0) {
  this.createShowImage();
  }
  for (let y = 0; y < this.opPicsList.length; y++) {
  if (name == this.opPicsList[y].name) {
   document.getElementById("bigImageE").src = this.opPicsList[y].url;
   // debugger
   // document.getElementById("bigImageE").width = this.opPicsList[y].url;
   // document.getElementById("bigImageE").height = this.opPicsList[y].url;
   // for (let i = 0; i < elementArr.length; i++) {
   // elementArr[i].style.display = "block";
   // }
   break;
  }
  }
 },
 closeImageShow() {
  let elementArr = document.getElementsByClassName("showBigImage");
  let main = document.getElementsByClassName("main");
  let count = elementArr.length;
  for (let i = 0; i < count; i++) {
  main[0].removeChild(elementArr[0]);
  }
 },
 rotateImage() {
  let imageE = document.getElementById("bigImageE");
  this.currentRotate = (this.currentRotate + 90) % 360;
  imageE.style.transform =
  imageE.style.transform.split(" ")[0] +
  " rotate(" +
  this.currentRotate +
  "deg)";
 },
 toLeftImage() {
  for (let y = 0; y < this.opPicsList.length; y++) {
  if (this.currentImageName == this.opPicsList[y].name) {
   if (y - 1 < 0) {
   this.$Message.info("已经是最左边的一张图了哦~");
   } else {
   this.currentImageName = this.opPicsList[y - 1].name;
   let imageE = document.getElementById("bigImageE");
   imageE.src = this.opPicsList[y - 1].url;
   // 加载完成执行
   imageE.onload = function() {
    if (imageE.naturalHeight < window.innerHeight) {
    //图片高度小于屏幕则需要垂直居中处理
    imageE.style.height = imageE.naturalHeight + "px";
    imageE.style.top = "50%";
    imageE.style.position = "relative";
    imageE.style.transform = "translateY(-50%)";
    imageE.style.zoom = "100%";
    } else {
    //需要去除前一张图片的效果
    imageE.style.height = window.innerHeight + "px";
    imageE.style.top = "0";
    imageE.style.position = "relative";
    imageE.style.transform = "translateY(0%)";
    imageE.style.zoom = "100%";
    }
   };
   }
   break;
  }
  }
 },
 toRightImage() {
  for (let y = 0; y < this.opPicsList.length; y++) {
  if (this.currentImageName == this.opPicsList[y].name) {
   if (y + 1 == this.opPicsList.length) {
   this.$Message.info("已经是最右边的一张图了哦~");
   } else {
   this.currentImageName = this.opPicsList[y + 1].name;
   let imageE = document.getElementById("bigImageE");
   imageE.src = this.opPicsList[y + 1].url;
   // 加载完成执行
   imageE.onload = function() {
    if (imageE.naturalHeight < window.innerHeight) {
    //图片高度小于屏幕则需要垂直居中处理
    imageE.style.height = imageE.naturalHeight + "px";
    imageE.style.top = "50%";
    imageE.style.position = "relative";
    imageE.style.transform = "translateY(-50%)";
    imageE.style.zoom = "100%";
    } else {
    //需要去除前一张图片的效果
    imageE.style.height = window.innerHeight + "px";
    imageE.style.top = "0";
    imageE.style.position = "relative";
    imageE.style.transform = "translateY(0%)";
    imageE.style.zoom = "100%";
    }
   };
   }
   break;
  }
  }
 },
 createShowImage() {
  //创建图片显示
  // let elementArr = document.getElementsByClassName("showBigImage");
  // if (elementArr.length == 0) {
  let main = document.getElementsByClassName("main");
  let topContainer = document.createElement("div");
  let scrollContainer = document.createElement("div");
  topContainer.style.position = "fixed";
  topContainer.style.zIndex = "80";
  topContainer.style.background = "rgba(0,0,0,0.80)";
  topContainer.style.height = "100%";
  topContainer.style.width = "100%";
  topContainer.style.textAlign = "center";
  topContainer.className = "showBigImage";
  // topContainer.style.display = "none";

  let imageContainer = document.createElement("div");
  imageContainer.style.width = window.innerWidth + "px";
  imageContainer.style.height = window.innerHeight + "px";
  imageContainer.style.margin = "0 auto";
  imageContainer.style.overflow = "auto";
  imageContainer.style.top = "50%";
  imageContainer.style.position = "relative";
  imageContainer.style.transform = "translateY(-50%)";

  let imageE = document.createElement("img");
  imageE.src = iconNoImages;
  imageE.title = "鼠标滚轮滚动可缩放图片";
  imageE.id = "bigImageE";
  // 加载完成执行
  imageE.onload = function() {
  if (imageE.naturalHeight < window.innerHeight) {
   //图片高度小于屏幕则需要垂直居中处理
   // imageE.style.width = "100%";
   imageE.style.top = "50%";
   imageE.style.position = "relative";
   imageE.style.transform = "translateY(-50%)";
  } else {
   imageE.style.height = window.innerHeight + "px";
  }
  };
  // imageE.style.width = "100%";
  // imageE.style.width = "475px";
  // imageE.style.height = window.innerHeight + 'px';

  // imageE.style.objectFit= "scale-down";
  // imageE.style.height = "100%";
  // imageE.style.top = "50%";
  // imageE.style.position = "relative";
  // imageE.style.transform = "translateY(-50%)";
  this.bigImage = imageE;

  //添加鼠标滚轮事件缩放图片
  if (imageE.addEventListener) {
  // IE9, Chrome, Safari, Opera
  imageE.addEventListener("mousewheel", this.rollImg, false);
  // Firefox
  imageE.addEventListener("DOMMouseScroll", this.rollImg, false);
  } else {
  // IE 6/7/8
  imageE.attachEvent("onmousewheel", this.rollImg);
  }
  imageContainer.appendChild(imageE);
  topContainer.appendChild(imageContainer);

  main[0].appendChild(topContainer);

  //创建点击左右浏览按钮
  //左按钮
  let imgLeft = document.createElement("img");
  imgLeft.src = iconLeft;
  imgLeft.style.zIndex = "101";
  imgLeft.style.position = "fixed";
  imgLeft.style.top = "50%";
  imgLeft.style.transform = "translateY(-50%)";
  imgLeft.style.left = "12%";
  imgLeft.style.cursor = "pointer";
  imgLeft.className = "showBigImage";
  //添加鼠标点击事件切换图片
  imgLeft.addEventListener("click", this.toLeftImage);
  //右按钮
  let imgRight = document.createElement("img");
  imgRight.src = iconRight;
  imgRight.style.zIndex = "101";
  imgRight.style.position = "fixed";
  imgRight.style.top = "50%";
  imgRight.style.transform = "translateY(-50%)";
  imgRight.style.right = "12%";
  imgRight.style.cursor = "pointer";
  imgRight.className = "showBigImage";
  //添加鼠标点击事件切换图片
  imgRight.addEventListener("click", this.toRightImage);

  //大图片选转
  let imgRotate = document.createElement("img");
  imgRotate.id = "rotateImageBtn";
  imgRotate.src = iconRotate;
  imgRotate.style.zIndex = "102";
  imgRotate.style.position = "fixed";
  imgRotate.style.top = "5%";
  imgRotate.style.right = "5%";
  imgRotate.style.transform = "translateY(-50%)";
  imgRotate.style.cursor = "pointer";
  imgRotate.className = "showBigImage";
  //添加鼠标点击事件旋转大图
  imgRotate.addEventListener("click", this.rotateImage);

  //关闭按钮
  let imgClose = document.createElement("img");
  imgClose.src = iconClose;
  imgClose.style.zIndex = "101";
  imgClose.style.position = "fixed";
  imgClose.style.top = "5%";
  imgClose.style.right = "1%";
  imgClose.style.transform = "translateY(-50%)";
  imgClose.style.cursor = "pointer";
  imgClose.className = "showBigImage";
  //添加鼠标点击事件关闭显示大图
  imgClose.addEventListener("click", this.closeImageShow);

  // imgLeft.style.display = "none";
  // imgRight.style.display = "none";
  // imgClose.style.display = "none";
  main[0].appendChild(imgLeft);
  main[0].appendChild(imgRight);
  main[0].appendChild(imgClose);
  main[0].appendChild(imgRotate);
  // main[0].style.textAlign = "center";
  // this.imgName = name;
  // this.visible = true;
  // }
 }
 },
 mounted() {
 // this.loadImages();
 }
};
</script>

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持我们。

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以下代码涉及 Vue 2.0 及 ES6 语法. 目标纯 javascrpit 实现,兼容ie9及以上浏览器,在本地做好文件格式.长宽.大小的检测,减少浏览器交互. 现实是残酷的,为了兼容Ie9 还是用上了 flash,第二篇来解释解释. 代码结构 <div id="wrap"> <label> 点我上传图片 <input type='file' @change="change" ref="input"> &
vue2.0 使用element-ui里的upload组件实现图片预览效果方法

1.首先我们在cli中引入element-ui 2.然后在具体的代码中放入uoload组件 <el-upload class="upload-demo" action="" :auto-upload='false' :on-change='changeUpload'> <el-button size="small" type="primary">点击上传</el-button> <di
使用VUE+iView+.Net Core上传图片的方法示例

我们直接进入主题,使用VS2017开发工具首先要创建一个WebApi项目,创建完之后,在wwwroot文件下,创建一个文件夹名字可以随意起我这里呢就叫做Upload了 ok ! 然后我们再创建一个控制器 IndexController 代码如下要知道上传图片都是通过HTTP去请求,服务端从request中读取 public class PicData { public string Msg { get; set; } } [HttpPost] public async Task<boo
Vue.js 2.0 移动端拍照压缩图片预览及上传实例

在学习和使用Vue.js 2.0 的过程中遇到不少不一样的地方,本来移动端开发H5应用,准备将mui框架和Vue.js+vue-router+vuex 全家桶结合起来使用,但是在拍照上传的实现过程中遇到了无法调用plus的H5+接口的问题,所以最后拍照上传功能还是使用input file方式里解决的.但是内心还是不甘心的,由于项目进度推进,迭代版本,所以不得不放弃,后续可能我将此功能使用调用H5+接口实现. 首先我来讲我实现这个拍照预览压缩上传的思路,准确的说应该是拍照或选择图片压缩之后预览及上
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本文介绍了基于Vue2x的图片预览插件的示例代码,分享给大家,具体如下: 先来看下Demo LiveDemo 关于开发Vue插件的几种方式 (具体请移步官网)Vue官网 MyPlugin.install = function (Vue, options) { // 1. 添加全局方法或属性 Vue.myGlobalMethod = function () { // 逻辑... } // 2. 添加全局资源 Vue.directive('my-directive', { bind (el, bin
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对于前端人员来说,图片处理是一个很常见的需求,由于图片稍微特殊,现在多数做法都是使用调用ajax接口通过http方法来提交,例如post方法提交,后台处理后返回一个图片路径给前端,前端根据这个路径写入img标签,但是基于当前的前后端分离的开发模式下,前后端代码往往不在同一个系统目录下,而且部署时可能liunx路径与windows路径不一样,这样后期路径更改可能会导致维护困难问题出现. 针对这种问题,这里我推荐使用图片转base64格式,再发给后端,后端只需将转码结果存入数据库即可,前端调用接口直
Vue.js 2.0 移动端拍照压缩图片上传预览功能

在学习和使用Vue.js 2.0 的过程中遇到不少不一样的地方,本来移动端开发H5应用,准备将mui框架和Vue.js+vue-router+vuex 全家桶结合起来使用,但是在拍照上传的实现过程中遇到了无法调用plus的H5+接口的问题,所以最后拍照上传功能还是使用input file方式里解决的.但是内心还是不甘心的,由于项目进度推进,迭代版本,所以不得不放弃,后续可能我将此功能使用调用H5+接口实现. 首先我来讲我实现这个拍照预览压缩上传的思路,准确的说应该是拍照或选择图片压缩之后预览及上
vue2实现移动端上传、预览、压缩图片解决拍照旋转问题

因为最近遇到个移动端上传头像的需求,上传到后台的数据是base64位,其中为了提高用户体验,把比较大的图片用canvas进行压缩之后再进行上传.在移动端调用拍照功能时,会发生图片旋转,为了解决这个问题引入了exif去判断拍照时的信息再去处理图片,这是个很好的插件.关于exif.js可以去他的GitHub上了解,这边直接 npm install exif-js --save 安装,然后import一下就可以使用了.以下就是源码,可以直接使用. <template> <div> &

vue iview多张图片大图预览、缩放翻转

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