項目需求，嵌到elementUi里的小組件，寫得不好，不喜勿噴，謝謝

父組件代碼

<template> <div> <see-attachment :filesLists=’files’ :file=’imgFile’ v-if='showmask' @hideMask=’showmask=false’></see-attachment> </div></template><script> import seeAttachment from './seeAttachment.vue'; export default { data() { return { showmask: false, imgFile: {} }; }, components: { seeAttachment }, methods: { lookImg(f) { this.showmask = true; this.imgFile = f; }, } };</script>

子組件代碼

<template> <div> <div @click='hideMask'> <div class='img_box'> <img :src='http://www.gepszalag.com/bcjs/imgPath' : : @click='stopEvent' id=’img’ /> </div> </div> <div class='handleImg_box'> <div @click='prevOne'><img src='http://www.gepszalag.com/static/img/prev.png' /></div> <div @click='rotate(0)'><img src='http://www.gepszalag.com/static/img/turn_left.png' /></div> <div @click='rotate(1)'><img src='http://www.gepszalag.com/static/img/turn_right.png' /></div> <div @click='nextOne'><img src='http://www.gepszalag.com/static/img/next.png' /></div> </div> </div></template><script> export default { name: ’seeAttachment’, props: [’filesLists’, ’file’], data: function() { return { imgPath: ’’, width: 0, height: 0, imgIndex: 0 } }, mounted() { this.getImgIndex(); this.seeAttachment(this.imgIndex); }, computed: { //去掉不是圖片的附件 imgList() { const ARR = ['png', 'PNG', 'jpeg', 'JPEG', 'bmp', 'BMP', 'jpg', 'JPG', 'gif', 'GIF']; let arrs = ’’; let suffix = ’’; let type = ’’; let newList = []; this.filesLists.forEach((item) => { arrs = item.name.split(’.’); suffix = arrs[arrs.length - 1]; type = item.type ? item.type : item.raw ? item.raw.type : suffix; ARR.some(items => { if (type.includes(items)) { newList.push(item) } }) }) return newList; } }, methods: { //通過父組件傳入的file獲取當前查看的圖片index getImgIndex() { let that = this; that.imgList.forEach((item, index) => { if(that.file.id == item.id){ that.imgIndex = index; } }) }, //?藏查看?D片 hideMask() { this.$emit(’hideMask’, false); }, stopEvent(event) { //阻止冒泡事件 //取消事件冒泡 let e = event; //若省略此句，下面的e改為event，IE運行可以，但是其他瀏覽器就不兼容 if (e && e.stopPropagation) { e.stopPropagation(); } else if (window.event) { window.event.cancelBubble = true; } }, //上一?? prevOne() { if (this.imgIndex == 0) { return false; } let img = document.getElementById(’img’) img.style.transform = ’rotate(0deg)’; this.imgIndex = this.imgIndex - 1; this.seeAttachment(this.imgIndex); }, //下一?? nextOne() { let listLength = this.imgList.length - 1; if (this.imgIndex >= listLength) { return false; } let img = document.getElementById(’img’) img.style.transform = ’rotate(0deg)’; this.imgIndex = this.imgIndex + 1; this.seeAttachment(this.imgIndex); }, //右轉(zhuǎn) rotate(t) { let img = document.getElementById(’img’) var reg = /(rotate([-+]?((d+)(deg))))/i; var wt = img.style[’-webkit-transform’], wts = wt.match(reg); var $3 = RegExp.$3; var current = $3 ? parseInt($3) : 0; if (t == 0) { current = current == 0 ? 360 : current; current = (current - 90) % 360; } else { current = (current + 90) % 360; } img.style.transform = ’rotate(’ + current + ’deg)’; }, seeAttachment(index = 0) { if (this.imgList.length == 0) { return false; } let that = this; let basePath = 'http://' + (process.env.OSS_PATH.indexOf('test') == -1 ? 'opyx-mtds-pro' : 'opyx-mtds-test') + '.oss-cn-shenzhen.aliyuncs.com/'; that.imgPath = basePath + that.imgList[index][’path’]; let img_url = basePath + that.imgList[index][’path’]; // 創(chuàng)建對象 var img = new Image(); // 改變圖片的src img.src = img_url; // 定時執(zhí)行獲取寬高 var check = function() { // 只要任何一方大于0 // 表示已經(jīng)服務(wù)器已經(jīng)返回寬高 if (img.width > 0 || img.height > 0) { let wdt = document.body.offsetWidth; let hgt = document.body.offsetHeight; let ratio = 1; if (img.width > img.height && img.width > wdt * ratio) { img.height = img.height * wdt * ratio / img.width; img.width = wdt * ratio; console.log(’寬大于高’, img) } else if (img.height > img.width && img.height > hgt * ratio) { img.width = img.width * hgt * ratio / img.height; if (img.width > wdt) { img.width = wdt; } img.height = hgt * ratio; console.log(’高大于寬’, img) } else { img.height = img.height * wdt * ratio / img.width img.width = wdt * ratio console.log(’正常’, img) } that.width = img.width; that.height = img.height; clearInterval(set); } }; var set = setInterval(check, 40); }, } }</script><style lang='scss' scoped> .handleImg_box { position: fixed; bottom: 0; left: 50%; z-index: 100; margin-left: -150px; width: 300px; padding: 1rem 0; display: flex; align-items: center; justify-content: space-around; } .handleImg_box div { font-size: 0; } .handleImg_box div img { width: 3rem; }</style>

補充知識：vue圖片放大、縮小、旋轉(zhuǎn)等。僅需要兩行代碼！！！

效果圖

實現(xiàn)步驟：

1.下載Viewer組件

npm install v-viewer --save

2.在圖片顯示的頁面引用 viewer組件（一個js文件，一個css樣式文件）

import Viewer from '@/assets/js/viewer.min.js';

import ’@/assets/css/viewer.min.css’;

3.再需要點擊圖片的標簽添加點擊事件@click

<img : :src='http://www.gepszalag.com/bcjs/item.publicFileURL' @click='aaa(item)' >

說明：因為我的圖片是在集合中存的需要動態(tài)的點擊放大（點哪個放大哪個）----id很重要 aaa()方法中要用

4.@click='aaa(item)'方法

aaa(item) { var viewer = new Viewer(document.getElementById(item.publicFileURL), { url: item.publicFileURL, }); },

以上這篇vue實現(xiàn)簡易圖片左右旋轉(zhuǎn),上一張,下一張組件案例就是小編分享給大家的全部內(nèi)容了，希望能給大家一個參考，也希望大家多多支持好吧啦網(wǎng)。