antdvue封装上传图片(单张图片上传)

蔚落 2023-01-13 06:25 256阅读 0赞

<template>
       <div class="clearfix">
        <a-upload
          :headers="headers"
          :action="fileurl"
          list-type="picture-card"
          :file-list="fileList"
          :before-upload="beforeUpload"
          @preview="handlePreview"
          @change="handleChange"
        >
          <div v-if="fileList.length < imgNum">
            <a-icon type="plus" />
            <div class="ant-upload-text">
              上传图片
            </div>
          </div>
        </a-upload>
        <a-modal :visible="previewVisible" :footer="null" @cancel="handleCancel">
          <img alt="example" style="width: 100%" :src="previewImage" />
        </a-modal>
      </div>
    </template>
    <script>
    function getBase64(file) { 
      return new Promise((resolve, reject) => { 
        const reader = new FileReader();
        reader.readAsDataURL(file);
        reader.onload = () => resolve(reader.result);
        reader.onerror = error => reject(error);
      });
    }
    export default { 
      props: { 
    	    msgVal: { 
    	        type: String, 
    	        default: ""
    	    }
    	},
      data() { 
        return { 
          imgNum:1,
          headers: { 
               'token': localStorage.getItem('token'),
            },
          fileurl:'http://192.168.18.188:9103'+"/file/upload",
          previewVisible: false,
          previewImage: '',
          fileList: []
        };
      },
      methods: { 
        handleCancel() { 
          this.previewVisible = false;
        },
        async handlePreview(file) { 
          if (!file.url && !file.preview) { 
            file.preview = await getBase64(file.originFileObj);
          }
          this.previewImage = file.url || file.preview;
          this.previewVisible = true;
        },
        handleChange({  fileList }) { 
          this.fileList = fileList; //fileList[0].response.data.fjurl//后台只需要这个地址/upload/2021-04-16/jyzxx.png
          this.$emit('fileimgUrl', fileList[0].response.data.fjurl) 
        },
        beforeUpload(file) { 
          const isJpgOrPng = file.type === 'image/jpeg' || file.type === 'image/png';
          if (!isJpgOrPng) { 
            this.$message.error('请上传jpg/png格式图片!');
          }
          const isLt2M = file.size / 1024 / 1024 < 2;
          if (!isLt2M) { 
            this.$message.error('图片大小不得超出2MB!');
          }
          return isJpgOrPng && isLt2M;
        },
      },
    };
    </script>
    <style scoped>
    .ant-upload-select-picture-card i { 
      font-size: 32px;
      color: #999;
    }
    
    .ant-upload-select-picture-card .ant-upload-text { 
      margin-top: 8px;
      color: #666;
    }
    </style>

使用：

<upload-img @fileimgUrl="fileimgUrl" :msg-val="msg"></upload-img>
    
    fileimgUrl(value){ 
    	//得到后台传过来的地址
    	console.log(value)
    }

假如在编辑的时候，后台返回了地址：http://192.168.18.188:9103/upload/2021-04-16/jyzxx.png，可直接给fileList赋值

fileList: [
            { 
              uid: '-1',
              name: 'image.png',
              status: 'done',
              url: msg,
            },

下面为传到后台返回的：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NDMyOTk2_size_16_color_FFFFFF_t_70_pic_center]  
**写的不好，可留言指正，互相学习！**

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQ1NDMyOTk2_size_16_color_FFFFFF_t_70_pic_center]: /images/20221022/96819a1329324e54a6712be8c36610bf.png