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vue-image-preview

v0.0.8

Published

本地图片预览组件

Downloads

26

Readme

vue-image-preview

本地图片预览组件

安装

npm install vue-image-preview

使用

VUE版本:1.x 必须在vue-cli生成的webpack模板环境中使用

<template>
  <image-preview :size="[640, 300]" file-size="1048576" :verify="verifyImage">
    <!--根节点必须是label-->
    <label>
      <input type="file" accept="image/jpeg,image/png,image/gif">
    </label>
  </image-preview>
</template>
<!--需要自定义图片选择控件的样式-->
<style>
  label {
  }
  label input {
    display: none;
  }
</style>
<script>
  // 注册组件
  import imagePreview from 'vue-image-preview'
  export default {
    components: {
      imagePreview
    },
    methods: {
      // 自定义图片预览的校验
      verifyImage (previewObj) {
        if (previewObj.width <= previewObj.height) return '请选择长方形图片'
      }
    },
    events: {
      onImagePreview (obj) {
        // 图片预览成功的事件
      },
      onImagePreviewError (errMsg) {
        // 图片预览失败的事件
      },
      onImagePreviewRemove (obj) {
        // 取消图片预览的事件
      }
    }
  }
</script>

image

图片选择控件的具体样式需要你自定义

Props

size(Array[Int, Int])

用于限制选择图片的像素尺寸

fileSize(Number/StringNumber)

用于限制选择图片的文件大小。单位:byte

verify(Function)

用于校验选择的图片。该函数如返回String数据,即代表校验不通过,该组件会将本次String数据作为出错提示dispatch出去,如返回Undefined(无返回数据),则代表校验通过。具体可参考上面示例

该函数的接收参数为PreviewObj

Events

onImagePreview

图片预览成功的事件。事件参数为PreviewObj

onImagePreviewError

图片预览失败的事件。事件参数errMsg可能为如下值:

  • 请使用尺寸为{width}*{height}的图片
  • 图片最大不能超过{fileSize}(MB/KB/B)
  • 图片格式不正确
  • 自定义校验方法返回的内容

onImagePreviewRemove

取消图片预览的事件。事件参数为PreviewObj

PreviewObj

{
  file: 当前图片的File对象,
  width: 当前图片的宽度,
  height: 当前图片的高度,
  dataUrl: 当前图片的DataUrl,
  imagePreview: 当前的vueImagePreview组件实例
}