vue2.0 多图片上传组件（el-upload）

组件：多图片上传(el-upload)

<template>
  <div>
    <el-upload
      ref="elUpload"
      :action="uploadPath"
      :headers="headers"
      list-type="picture-card"
      :on-preview="handlePictureCardPreview"
      :before-remove="beforeRemove"
      :on-remove="handleRemove"
      :on-success="handleUploadSuccess"
      :on-exceed="handleUploadExceed"
      :file-list="imageList"
      accept=".jpeg,JPEG,.jpg,.JPG,.png,.PNG,gif,.GIF"
      :before-upload="beforeAvatarUpload"
      :limit="limit"
    >
      <i class="el-icon-plus" />
    </el-upload>
    <el-dialog :visible.sync="dialogVisible" top="2vh" append-to-body>
      <img width="100%" :src="dialogImageUrl" alt="">
    </el-dialog>
  </div>
</template>

<script>
import { getToken } from '@/utils/auth'
export default {
  props: {
    value: {
      default: '',
      type: String
    },
    // 图片限制数量，默认3个
    limit: {
      type: Number,
      default() {
        return 3
      }
    }
  },
  data() {
    return {
      dialogImageUrl: '',
      dialogVisible: false,
      resourcesUrl: '',
      // 此处路径配置成自己的上传文件地址
      uploadPath: process.env.VUE_APP_BASE_API + '/api/file/test/upload',
      headers: {
        'Authorization': getToken()
      }
    }
  },
  computed: {
    imageList() {
      const res = []
      if (this.value) {
        const imageArray = this.value.split(',')
        for (let i = 0; i < imageArray.length; i++) {
          res.push({ url: this.resourcesUrl + imageArray[i], response: imageArray[i] })
        }
      }
      this.$emit('input', this.value)
      return res
    }
  },
  methods: {
    // 图片上传
    handleUploadSuccess(response, file, fileList) {
      console.log(file)
      console.log(fileList)
      const pics = fileList.map(file => {
        if ((typeof file.response) === 'object') {
          return file.response.fileUrl
        } else {
          return file.response
        }
      }).join(',')
      console.log(pics)
      this.$emit('input', pics)
    },
    handleUploadExceed(files, fileList) {
      this.loading = false
      this.$message.warning(`对不起，最多上传个` + fileList.length + `图片`)
    },
    // 限制图片上传大小
    beforeAvatarUpload(file) {
      const isPic =
        file.type === 'image/jpeg' ||
        file.type === 'image/png' ||
        file.type === 'image/gif' ||
        file.type === 'image/jpg'
      const isLt8M = file.size / 1024 / 1024 < 8
      if (!isPic) {
        this.$message.error('上传图片只能是 JPG、JPEG、PNG、GIF 格式!')
        return false
      }
      if (!isLt8M) {
        this.$message.error('上传图片大小不能超过 8MB!')
      }
      return isPic && isLt8M
    },
    beforeRemove(file, fileList) {
      return this.$confirm(`确定移除该图片？`)
    },
    handleRemove(file, fileList) {
      const pics = fileList.map(file => {
        return file.response
      }).join(',')
      this.$emit('input', pics)
    },
    handlePictureCardPreview(file) {
      this.dialogImageUrl = file.url
      this.dialogVisible = true
    }
  }
}
</script>

<style lang="scss">
</style>

使用

1. 在需要使用文件上传页面的.vue文件中引用
   组件路径如下图：

import mulPicUpload from '@/components/MulPicUpload'

2. 注入

components: { mulPicUpload }

3. 使用（不写limit时，默认文件限制数为3；文件大小限制为8M;多个文件时，picUrl的值为“英文逗号”隔开的字符串）

<mul-pic-upload v-model="form.picUrl" :limit="1"/>