图片回显 组件 vue2+element
<template>
<div>
<el-image v-for="(item,index) in realSrcList" :key="index"
:src="`${item}`"
fit="cover"
:style="`width:${realWidth};height:${realHeight};`"
:preview-src-list="realSrcList"
>
<div slot="error" class="image-slot">
<i class="el-icon-picture-outline"></i>
</div>
</el-image>
</div>
</template>
<script>
export default {
name: "ImagePreview",
props: {
src: {
type: String,
default: ""
},
width: {
type: [Number, String],
default: ""
},
height: {
type: [Number, String],
default: ""
}
},
computed: {
realSrc() {
if (!this.src) {
return;
}
let real_src = this.src.split(",")[0];
return real_src;
},
realSrcList() {
if (!this.src) {
return;
}
let real_src_list = this.src.split(",");
let srcList = [];
real_src_list.forEach(item => {
return srcList.push(item);
});
return srcList;
},
realWidth() {
return typeof this.width == "string" ? this.width : `${this.width}px`;
},
realHeight() {
return typeof this.height == "string" ? this.height : `${this.height}px`;
}
},
};
</script>
<style lang="scss" scoped>
.el-image {
border-radius: 5px;
background-color: #ebeef5;
box-shadow: 0 0 5px 1px #ccc;
::v-deep .el-image__inner {
transition: all 0.3s;
cursor: pointer;
&:hover {
transform: scale(1.2);
}
}
::v-deep .image-slot {
display: flex;
justify-content: center;
align-items: center;
width: 100%;
height: 100%;
color: #909399;
font-size: 30px;
}
}
</style>
图片上传 组件 vue2+element
<template>
<div class="component-upload-image">
<el-upload
multiple
:action="uploadImgUrl"
list-type="picture-card"
:on-success="handleUploadSuccess"
:before-upload="handleBeforeUpload"
:limit="limit"
:on-error="handleUploadError"
:on-exceed="handleExceed"
ref="imageUpload"
:on-remove="handleDelete"
:show-file-list="true"
:headers="headers"
:file-list="fileList"
:on-preview="handlePictureCardPreview"
:class="{ hide: this.fileList.length >= this.limit }"
>
<i class="el-icon-plus"></i>
</el-upload>
<!-- 上传提示 -->
<div class="el-upload__tip" slot="tip" v-if="showTip">
请上传
<template v-if="fileSize">
大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b>
</template>
<template v-if="fileType">
格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b>
</template>
的文件
</div>
<el-dialog
:visible.sync="dialogVisible"
title="预览"
width="800"
append-to-body
>
<img
:src="dialogImageUrl"
style="display: block; max-width: 100%; margin: 0 auto"
/>
</el-dialog>
</div>
</template>
<script>
import { getToken } from "@/utils/auth";
import { listByIds, delOss } from "@/api/system/oss";
export default {
props: {
value: [String, Object, Array],
// 图片数量限制
limit: {
type: Number,
default: 5,
},
// 大小限制(MB)
fileSize: {
type: Number,
default: 5,
},
// 文件类型, 例如['png', 'jpg', 'jpeg']
fileType: {
type: Array,
default: () => ["png", "jpg", "jpeg"],
},
// 是否显示提示
isShowTip: {
type: Boolean,
default: true,
},
},
data() {
return {
number: 0,
uploadList: [],
dialogImageUrl: "",
dialogVisible: false,
hideUpload: false,
baseUrl: process.env.VUE_APP_BASE_API,
uploadImgUrl: process.env.VUE_APP_BASE_API + "/system/oss/upload", // 上传的图片服务器地址
headers: {
Authorization: "Bearer " + getToken(),
},
fileList: [],
};
},
watch: {
value: {
async handler(val) {
if (val) {
// 首先将值转为数组
let list;
if (Array.isArray(val)) {
list = val;
} else {
await listByIds(val).then((res) => {
list = res.data;
this.$emit("getImg", list);
});
}
// 然后将数组转为对象数组
this.fileList = list.map((item) => {
// 此处name使用ossId 防止删除出现重名
item = { name: item.ossId, url: item.url, ossId: item.ossId };
return item;
});
} else {
this.fileList = [];
return [];
}
},
deep: true,
immediate: true,
},
},
computed: {
// 是否显示提示
showTip() {
return this.isShowTip && (this.fileType || this.fileSize);
},
},
methods: {
// 上传前loading加载
handleBeforeUpload(file) {
// 初始值为false,表示待上传文件是否为允许的图片类型。
let isImg = false;
if (this.fileType.length) {
// 如果文件名包含.,则提取出最后一个.之后的部分作为fileExtension
let fileExtension = "";
if (file.name.lastIndexOf(".") > -1) {
fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
}
// 检查file.type(MIME类型)是否包含任一允许类型。
// 如果fileExtension已获取,检查其是否包含任一允许类型。
// 若有任一匹配,将isImg置为true。
isImg = this.fileType.some((type) => {
if (file.type.indexOf(type) > -1) return true;
if (fileExtension && fileExtension.indexOf(type) > -1) return true;
return false;
});
} else {
// 若this.fileType数组为空,仅检查file.type是否以"image"开头,以此判断是否为图片。
isImg = file.type.indexOf("image") > -1;
}
if (!isImg) {
this.$modal.msgError(
`文件格式不正确, 请上传${this.fileType.join("/")}图片格式文件!`
);
return false;
}
if (this.fileSize) {
const isLt = file.size / 1024 / 1024 < this.fileSize;
if (!isLt) {
this.$modal.msgError(`上传头像图片大小不能超过 ${this.fileSize} MB!`);
return false;
}
}
this.$modal.loading("正在上传图片,请稍候...");
this.number++;
},
// 文件个数超出
handleExceed() {
this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`);
},
// 上传成功回调
handleUploadSuccess(res, file) {
if (res.code === 200) {
this.uploadList.push({
name: res.data.fileName,
url: res.data.url,
ossId: res.data.ossId,
});
this.uploadedSuccessfully();
} else {
this.number--;
this.$modal.closeLoading();
this.$modal.msgError(res.msg);
this.$refs.imageUpload.handleRemove(file);
this.uploadedSuccessfully();
}
},
// 删除图片
handleDelete(file) {
const findex = this.fileList.map((f) => f.name).indexOf(file.name);
if (findex > -1) {
let ossId = this.fileList[findex].ossId;
// delOss(ossId);
this.fileList.splice(findex, 1);
this.$emit("input", this.listToString(this.fileList));
}
},
// 上传失败
handleUploadError(res) {
this.$modal.msgError("上传图片失败,请重试");
this.$modal.closeLoading();
},
// 上传结束处理
uploadedSuccessfully() {
if (this.number > 0 && this.uploadList.length === this.number) {
this.fileList = this.fileList.concat(this.uploadList);
this.uploadList = [];
this.number = 0;
this.$emit("input", this.listToString(this.fileList));
this.$modal.closeLoading();
}
},
// 预览
handlePictureCardPreview(file) {
this.dialogImageUrl = file.url;
this.dialogVisible = true;
},
// 对象转成指定字符串分隔
listToString(list, separator) {
let strs = "";
separator = separator || ",";
for (let i in list) {
if (list[i].ossId) {
strs += list[i].ossId + separator;
}
}
return strs != "" ? strs.substr(0, strs.length - 1) : "";
},
},
};
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
::v-deep.hide .el-upload--picture-card {
display: none;
}
// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
transition: all 0s;
}
::v-deep .el-list-enter,
.el-list-leave-active {
opacity: 0;
transform: translateY(0);
}
</style>