Vue图片裁剪
wooyang2018 人气:0前言
这两天想给图片添加一个图片裁剪的功能,因为之前的图片都是直接上传的,很多图片肯定在前台显示的时候,都不能很好的达到我们想要的效果,因此就需要我们在对个别图片进行细微调整,已达到我们的目的。
图片裁剪
关于图片裁剪我在github中找到了两种
- vue-cropper
- vue-image-crop-upload
这两种的样式分别如下所示:
首先是vue-image-crop-upload,我们能够发现其实这个截图有点类似于我们需要裁减头像的时候,才需要使用的,而针对于特定的矩形,可能没办法达到我们的效果
其次我们再看 vue-cropper图片裁剪,它是可以根据我们的实际需求进行裁剪,所以综上可能下面这块比较适合现在的项目需求,但是我们也可以使用上面的这款作为头像裁剪的组件。
裁剪后的效果:
引入Vue-cropper
安装依赖
npm install vue-cropper --save
页面引入
import { VueCropper } from 'vue-cropper'
申明组件
components: { VueCropper, },
完整代码
<!-- 裁剪图片 --> <template> <div class="wrapper"> <div class="model" v-show="model" @click="model = false"> <div class="model-show"> <img :src="modelSrc" alt=""> </div> </div> <div class="content"> <div class="show-info"> <h2>自动生成截图框 固定比例 w : h => 4 : 3</h2> <div class="test"> <vueCropper ref="cropper2" :img="example2.img" :outputSize="example2.size" :outputType="example2.outputType" :info="example2.info" :canScale="example2.canScale" :autoCrop="example2.autoCrop" :autoCropWidth="example2.autoCropWidth" :autoCropHeight="example2.autoCropHeight" :fixed="example2.fixed" :fixedNumber="example2.fixedNumber" :enlarge="4"></vueCropper> </div> <label class="btn" for="upload2">上传</label> <input type="file" id="upload2" style="position:absolute; clip:rect(0 0 0 0);" accept="image/png, image/jpeg, image/gif, image/jpg" @change="uploadImg($event,2)"> <button @click="finish2()" class="btn">裁剪</button> </div> </div> </div> </template> <script> import { VueCropper } from 'vue-cropper' // import * as OSS from 'ali-oss'; export default { components: { VueCropper, }, data() { return { model: false, modelSrc: '', crap: false, previews: {}, form: { head: '' }, example2: { //img的路径自行修改 img: '$oss.url + \'/\' + form.head ', info: true, size: 1, outputType: 'jpeg', canScale: true, autoCrop: true, // 只有自动截图开启 宽度高度才生效 autoCropWidth: 300, autoCropHeight: 250, fixed: true, // 真实的输出宽高 infoTrue: true, fixedNumber: [4, 3] }, downImg: '#' } }, methods: { //点击裁剪,这一步是可以拿到处理后的地址 finish2() { this.$refs.cropper2.getCropData((data) => { this.modelSrc = data this.model = false; //裁剪后的图片显示 this.example2.img = this.modelSrc; // this.toBlob(data) // console.log(data) // console.log(this.toBlob(data)) //将图片上传服务器中 }) }, uploadImg(e, num) { //上传图片 this.example2.img = '' var file = e.target.files[0] if (!/\.(gif|jpg|jpeg|png|bmp|GIF|JPG|PNG)$/.test(e.target.value)) { alert('图片类型必须是.gif,jpeg,jpg,png,bmp中的一种') return false } var reader = new FileReader() reader.onload = (e) => { let data data = e.target.result if (typeof e.target.result === 'object') { // 把Array Buffer转化为blob 如果是base64不需要 data = window.URL.createObjectURL(new Blob([e.target.result])) } else { data = e.target.result } if (num === 1) { this.option.img = data } else if (num === 2) { this.example2.img = data } } // 转化为base64 // reader.readAsDataURL(file) // 转化为blobcs reader.readAsArrayBuffer(file) }, // base64转blob toBlob(ndata) { //ndata为base64格式地址 console.log(ndata) let arr = ndata.split(','), mime = arr[0].match(/:(.*?);/)[1], bstr = atob(arr[1]), n = bstr.length, u8arr = new Uint8Array(n); while (n--) { u8arr[n] = bstr.charCodeAt(n); } return new Blob([u8arr], { type: mime }) } }, } </script> <style> * { margin: 0; padding: 0; } .content { margin: auto; max-width: 585px; margin-bottom: 100px; } .test-button { display: flex; flex-wrap: wrap; } .btn { display: inline-block; line-height: 1; white-space: nowrap; cursor: pointer; background: #fff; border: 1px solid #c0ccda; color: #1f2d3d; text-align: center; box-sizing: border-box; outline: none; margin: 20px 10px 0px 0px; padding: 9px 15px; font-size: 14px; border-radius: 4px; color: #fff; background-color: #50bfff; border-color: #50bfff; transition: all .2s ease; text-decoration: none; user-select: none; } .des { line-height: 30px; } code.language-html { padding: 10px 20px; margin: 10px 0px; display: block; background-color: #333; color: #fff; overflow-x: auto; font-family: Consolas, Monaco, Droid, Sans, Mono, Source, Code, Pro, Menlo, Lucida, Sans, Type, Writer, Ubuntu, Mono; border-radius: 5px; white-space: pre; } .show-info { margin-bottom: 50px; } .show-info h2 { line-height: 50px; } /*.title, .title:hover, .title-focus, .title:visited { color: black; }*/ .title { display: block; text-decoration: none; text-align: center; line-height: 1.5; margin: 20px 0px; background-image: -webkit-linear-gradient(left, #3498db, #f47920 10%, #d71345 20%, #f7acbc 30%, #ffd400 40%, #3498db 50%, #f47920 60%, #d71345 70%, #f7acbc 80%, #ffd400 90%, #3498db); color: transparent; -webkit-background-clip: text; background-size: 200% 100%; animation: slide 5s infinite linear; font-size: 40px; } .test { height: 285px; } .model { position: fixed; z-index: 10; width: 100vw; height: 100vh; overflow: auto; top: 0; left: 0; background: rgba(0, 0, 0, 0.8); } .model-show { display: flex; justify-content: center; align-items: center; width: 100vw; height: 100vh; } .model img { display: block; margin: auto; max-width: 80%; user-select: none; background-position: 0px 0px, 10px 10px; background-size: 20px 20px; background-image: linear-gradient(45deg, #eee 25%, transparent 25%, transparent 75%, #eee 75%, #eee 100%), linear-gradient(45deg, #eee 25%, white 25%, white 75%, #eee 75%, #eee 100%); } .c-item { display: block; padding: 10px 0; user-select: none; } @keyframes slide { 0% { background-position: 0 0; } 100% { background-position: -100% 0; } } @media screen and (max-width: 1000px) { .content { max-width: 90%; margin: auto; } .test { height: 400px; } } </style>
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