2024.4.4今天我学习了如何使用若依的vue-cropper上传图片组件,在工作中遇到一个需求,需要对上传的图片进行旋转的操作,然后我先找到el-upload组件,使用之后发现它有一个自动上传和非自动上传的功能,是不是就可以通过非自动上传的功能然后跳一个弹窗,在弹窗里面进行操作再上传。
一、用el-upload
在使用非自动上传之后用on-change事件来触发一个弹窗,把上传的图片先放大显示,然后下面放一个左右旋转的按钮,通过ref this.$ref.xxx.style.transform修改样式进行旋转,但是这样只能单纯的旋转图片,不能把旋转之后的图片保存下来。
官方地址:
Element - The world's most popular Vue UI framework
二、用vue-cropper
后来百度找到若依有自带上传图片旋转的方法。
官方地址:若依管理系统
官方代码地址:ruoyi-ui/src/views/system/user/profile/userAvatar.vue · 若依/RuoYi-Vue - Gitee.com
效果如下:
完整代码如下:
<template>
<div>
<div class="user-info-head" @click="editCropper()"><img v-bind:src="options.img" title="点击上传头像" class="img-circle img-lg" /></div>
<el-dialog :title="title" :visible.sync="open" width="800px" append-to-body @opened="modalOpened" @close="closeDialog">
<el-row>
<el-col :xs="24" :md="12" :style="{height: '350px'}">
<vue-cropper
ref="cropper"
:img="options.img"
:info="true"
:autoCrop="options.autoCrop"
:autoCropWidth="options.autoCropWidth"
:autoCropHeight="options.autoCropHeight"
:fixedBox="options.fixedBox"
:outputType="options.outputType"
@realTime="realTime"
v-if="visible"
/>
</el-col>
<el-col :xs="24" :md="12" :style="{height: '350px'}">
<div class="avatar-upload-preview">
<img :src="previews.url" :style="previews.img" />
</div>
</el-col>
</el-row>
<br />
<el-row>
<el-col :lg="2" :sm="3" :xs="3">
<el-upload action="#" :http-request="requestUpload" :show-file-list="false" :before-upload="beforeUpload">
<el-button size="small">
选择
<i class="el-icon-upload el-icon--right"></i>
</el-button>
</el-upload>
</el-col>
<el-col :lg="{span: 1, offset: 2}" :sm="2" :xs="2">
<el-button icon="el-icon-plus" size="small" @click="changeScale(1)"></el-button>
</el-col>
<el-col :lg="{span: 1, offset: 1}" :sm="2" :xs="2">
<el-button icon="el-icon-minus" size="small" @click="changeScale(-1)"></el-button>
</el-col>
<el-col :lg="{span: 1, offset: 1}" :sm="2" :xs="2">
<el-button icon="el-icon-refresh-left" size="small" @click="rotateLeft()"></el-button>
</el-col>
<el-col :lg="{span: 1, offset: 1}" :sm="2" :xs="2">
<el-button icon="el-icon-refresh-right" size="small" @click="rotateRight()"></el-button>
</el-col>
<el-col :lg="{span: 2, offset: 6}" :sm="2" :xs="2">
<el-button type="primary" size="small" @click="uploadImg()">提 交</el-button>
</el-col>
</el-row>
</el-dialog>
</div>
</template>
<script>
import store from "@/store";
import { VueCropper } from "vue-cropper";
import { uploadAvatar } from "@/api/system/user";
import { debounce } from '@/utils'
export default {
components: { VueCropper },
data() {
return {
// 是否显示弹出层
open: false,
// 是否显示cropper
visible: false,
// 弹出层标题
title: "修改头像",
options: {
img: store.getters.avatar, //裁剪图片的地址
autoCrop: true, // 是否默认生成截图框
autoCropWidth: 200, // 默认生成截图框宽度
autoCropHeight: 200, // 默认生成截图框高度
fixedBox: true, // 固定截图框大小 不允许改变
outputType:"png", // 默认生成截图为PNG格式
filename: 'avatar' // 文件名称
},
previews: {},
resizeHandler: null
};
},
methods: {
// 编辑头像
editCropper() {
this.open = true;
},
// 打开弹出层结束时的回调
modalOpened() {
this.visible = true;
if (!this.resizeHandler) {
this.resizeHandler = debounce(() => {
this.refresh()
}, 100)
}
window.addEventListener("resize", this.resizeHandler)
},
// 刷新组件
refresh() {
this.$refs.cropper.refresh();
},
// 覆盖默认的上传行为
requestUpload() {
},
// 向左旋转
rotateLeft() {
this.$refs.cropper.rotateLeft();
},
// 向右旋转
rotateRight() {
this.$refs.cropper.rotateRight();
},
// 图片缩放
changeScale(num) {
num = num || 1;
this.$refs.cropper.changeScale(num);
},
// 上传预处理
beforeUpload(file) {
if (file.type.indexOf("image/") == -1) {
this.$modal.msgError("文件格式错误,请上传图片类型,如:JPG,PNG后缀的文件。");
} else {
const reader = new FileReader();
reader.readAsDataURL(file);
reader.onload = () => {
this.options.img = reader.result;
this.options.filename = file.name;
};
}
},
// 上传图片
uploadImg() {
this.$refs.cropper.getCropBlob(data => {
let formData = new FormData();
formData.append("avatarfile", data, this.options.filename);
uploadAvatar(formData).then(response => {
this.open = false;
this.options.img = process.env.VUE_APP_BASE_API + response.imgUrl;
store.commit('SET_AVATAR', this.options.img);
this.$modal.msgSuccess("修改成功");
this.visible = false;
});
});
},
// 实时预览
realTime(data) {
this.previews = data;
},
// 关闭窗口
closeDialog() {
this.options.img = store.getters.avatar
this.visible = false;
window.removeEventListener("resize", this.resizeHandler)
}
}
};
</script>
<style scoped lang="scss">
.user-info-head {
position: relative;
display: inline-block;
height: 120px;
}
.user-info-head:hover:after {
content: '+';
position: absolute;
left: 0;
right: 0;
top: 0;
bottom: 0;
color: #eee;
background: rgba(0, 0, 0, 0.5);
font-size: 24px;
font-style: normal;
-webkit-font-smoothing: antialiased;
-moz-osx-font-smoothing: grayscale;
cursor: pointer;
line-height: 110px;
border-radius: 50%;
}
</style>