Vue3 图片上传组件

基于 vue3 element-plus 图片上传组件封装，兄弟姐妹们，将就看一下吧，上代码，ImageUpload.vue：

<template>
  <div class="component-upload-image">
    <el-upload
      :limit="limit"
      :action="uploadFileSignleUrl"
      list-type="picture-card"
      ref="imageUploadRef"
      :multiple="limit > 1"
      :before-upload="handleBeforeUpload"
      :on-preview="handlePictureCardPreview" 
      :http-request="uploadImg" 
      :on-remove="handleRemove" 
      :on-exceed="handleExceed"
      v-model:file-list="fileList"
      :class="{ hide: fileList.length >= limit }">
      <el-icon class="avatar-uploader-icon"><plus /></el-icon>
    </el-upload>
    <!-- 上传提示 -->
    <div class="el-upload__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>
    <template v-if="showTipButton">
      <el-button link type="primary" @click="showDiagram = !showDiagram" icon="InfoFilled">查看示意图</el-button>
    </template>
    <el-image class="tip-img" :src="diagram" fit="contain" :preview-src-list="[diagram]" v-if="showDiagram" :preview-teleported="true"></el-image>
    <el-dialog
      v-model="dialogVisible"
      title="预览"
      width="800px"
      append-to-body
    >
      <img
        :src="dialogImageUrl"
        style="display: block; max-width: 100%; margin: 0 auto"
      />
    </el-dialog>
  </div>
</template>

<script setup name="ImageUpload">
import { uploadFileSignleUrl, uploadSingleFile } from '@/api/upload.js'
const props = defineProps({
  // 是否显示示意图
  showTipButton: {
    type: Boolean,
    default: false
  },
  // 示意图
  diagram: { 
    type: String,
    default: '',
  },
  modelValue: {
    type:Array,
    default:[]
  },
  // 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
  },
});

const { proxy } = getCurrentInstance();
const emits = defineEmits(['update:modelValue']);
const showDiagram = ref(false)
const dialogImageUrl = ref("");
const dialogVisible = ref(false);
const imageUploadRef = ref(null)
const showTip = computed(
  () => props.isShowTip && (props.fileType || props.fileSize)
);
const fileList = computed({
  get: () => props.modelValue,
  set: (val) => {
    emits('update:modelValue', val)
  }
});
// 格式化
const getFormData = (filename,file) =>{
    const formData = new FormData();
    // const name = file.name.replace(/\.[a-zA-Z]+$/g,'') + '_'+ new Date().getTime() // 带上时间戳，避免文件地址重复被覆盖
    // formData.append('name', name);
    formData.append(filename, file);
    return formData
}
// 文件上传
const uploadImg = (file)=>{
    proxy.$modal.loading("上传中")
    const data = getFormData(file.filename,file.file)
    uploadSingleFile(data).then(res=>{
        if(res.code == 200 && res.data){
            if(res.data.url){
                let current = fileList.value.find(z=>z.uid == file.file.uid)
                current.status = 'success'
                current.url = res.data.url
                current.ossId = res.data.ossId
                current.fileName = res.data.fileName
            }
        }else{
            const index = fileList.value.findIndex(z=>z.uid == file.file.uid)
            fileList.value.splice(index,1)
            proxy.$modal.msgError(res.msg || '发生错误，请稍后重试！')
        }
        proxy.$modal.closeLoading()
    }).catch(error=>{
        const index = fileList.value.findIndex(z=>z.uid == file.file.uid)
        fileList.value.splice(index,1)
        proxy.$modal.closeLoading()
        proxy.$modal.msgError(
            error && typeof error == 'object'
            ? error.statusText || error.message || JSON.stringify(error)
            : error || '发生错误，请稍后重试！'
        )
    })
}
// 上传前loading加载
function handleBeforeUpload(file) {
  try {
    let isImg = false;
    if (props.fileType.length) {
      let fileExtension = "";
      if (file.name.lastIndexOf(".") > -1) {
        fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
      }
      isImg = props.fileType.some(type => {
        if (file.type.indexOf(type) > -1) return true;
        if (fileExtension && fileExtension.indexOf(type) > -1) return true;
        return false;
      });
    } else {
      isImg = file.type.indexOf("image") > -1;
    }
    if (!isImg) {
      proxy.$modal.msgError(
        `文件格式不正确, 请上传${props.fileType.join("/")}图片格式文件!`
      );
      return false;
    }
    if (props.fileSize) {
      const isLt = file.size / 1024 / 1024 < props.fileSize;
      if (!isLt) {
        proxy.$modal.msgError(`上传头像图片大小不能超过 ${props.fileSize} MB!`);
        return false;
      }
    }
    proxy.$modal.loading("正在上传图片，请稍候...");
  } catch (error) {
    proxy.$modal.closeLoading();
    console.log(error)
  }
}
// 文件个数超出
function handleExceed() {
  proxy.$modal.msgError(`上传文件数量不能超过 ${props.limit} 个!`);
}
// 预览
function handlePictureCardPreview(file) {
  dialogImageUrl.value = file.url;
  dialogVisible.value = true;
}
// 文件删除回调
const handleRemove = (file) => {
}
// 格式化文件
const fileStringToList =(fileStr)=>{
    if(fileStr && fileStr.length >0){
        return fileStr.split(',').map(url=>{
            return { name : url.split('/').pop(), url : url } 
        })
    }else{
        return []
    }
}
const fileListToString = (fileList)=>{
    if(fileList && fileList.length >0){
        return fileList.map(z=>z.url).join(',')
    }else{
        return ''
    }
}
defineExpose({
  fileStringToList,
  fileListToString
})
</script>

<style scoped lang="scss">
:deep(.hide .el-upload--picture-card) {
    display: none;
}
</style>