Vue+Element-UI 上传图片并压缩，供大家参考，具体内容如下
1.版本
Vue:2.5.2Element-UI：2.12.0
可实现图片上传前，自动压缩。Element-UI组件，详情见 官网。
2.template部分
<el-form...
Vue+Element-UI 上传图片并压缩，供大家参考，具体内容如下
1.版本
Vue:2.5.2
Element-UI：2.12.0
可实现图片上传前，自动压缩。
Element-UI组件，详情见 官网。
2.template部分
<el-form-item label="照片">
<el-upload
accept="image/*"
class="avatar-uploader"
:action="uploadPath"
:show-file-list="false"
:on-success="handleAvatarSuccess"
:before-upload="beforeAvatarUpload">
<img v-if="imgUrl" :src="imgUrl" class="avatar">
<i v-else class="el-icon-plus avatar-uploader-icon"></i>
</el-upload>
</el-form-item>
3.script部分
data() {
return {
//压缩质量
imgQuality: 0.5,
imageUrl: ''
}
methods: {
handleAvatarSuccess(res, file) {
// 服务器返回结果处理
},
dataURItoBlob(dataURI, type) {
var binary = atob(dataURI.split(',')[1]);
var array = [];
for(var i = 0; i < binary.length; i++) {
array.push(binary.charCodeAt(i));
}
return new Blob([new Uint8Array(array)], {type: type});
},
beforeAvatarUpload(file) {
const _this = this
return new Promise(resolve => {
const reader = new FileReader()
const image = new Image()
image.onload = (imageEvent) => {
const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
const width = image.width * _this.imgQuality
const height = image.height * _this.imgQuality
canvas.width = width;
canvas.height = height;
context.clearRect(0, 0, width, height);
context.drawImage(image, 0, 0, width, height);
const dataUrl = canvas.toDataURL(file.type);
const blobData = _this.dataURItoBlob(dataUrl, file.type);
resolve(blobData)
}
reader.onload = (e => { image.src = e.target.result; });
reader.readAsDataURL(file);
})
}
}
