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dataURL\r\n\r\n```javascript\r\npicProcesser.compress(file, 0.2, 1000, 'image/png')\r\n```\r\n\r\n#### 参数\r\n参数|类型|默认值|说明\r\n---|---|---|---\r\n`file` | File | `null` | 图片文件\r\n`options` | [PicProcesserTypes.CompressOptions](#####PicProcesserTypes.CompressOptions) | `{ratio: 0.5, maxWidth: null,mime:'image/jpeg'}` | 压缩选项\r\n\r\n##### PicProcesserTypes.CompressOptions\r\n参数|类型|默认值|说明\r\n---|---|---|---\r\n`ratio` | number | `0.5` | 压缩比例，`0`-`1` 之间的小数\r\n`maxWidth` | number | `null` | 图片宽度上限，>1的整数，单位px，`0` 或 `null` 表示不限制，输出图片的高度会依此等比例缩放\r\n`mime` | string | `image/jpeg` | 输出图片类型\r\n\r\n#### 返回\r\n返回值|类型|说明\r\n---|---|---\r\n`Promise` | `Promise` | 压缩后的图片 dataURL 编码\r\n\r\n*注意：因为是借助 canvas 渲染输出，几乎是重绘了图片，所以如果压缩比率（`ratio`）设置得太高，最终文件字节可能会比原图更大*\r\n\r\n***\r\n\r\n### getDataURL\r\nFile 转 dataURL\r\n\r\n```javascript\r\npicProcesser.getDataURL(file)\r\n```\r\n#### 参数\r\n参数|类型|默认值|说明\r\n---|---|---|---\r\n`file` | File \\| Blob | `null` | 图片文件\r\n\r\n#### 返回\r\n返回值|类型|说明\r\n---|---|---\r\n`Promise` | `Promise` | 完整的 FileReader 对象，通过`result`属性获取 base64 编码\r\n\r\n***\r\n\r\n### dataURLtoFile\r\ndataURL 转 File 对象\r\n\r\n```javascript\r\npicProcesser.dataURLtoFile(dataURL, 'export.jpg')\r\n```\r\n\r\n#### 参数\r\n参数|类型|默认值|说明\r\n---|---|---|---\r\n`dataURL` | string | `null` | base64编码\r\n`fileName` | string | `null` | 输出文件名\r\n\r\n#### 返回\r\n返回值|类型|说明\r\n---|---|---\r\n`Promise` | `Promise` | File 对象\r\n","readmeFilename":"README.md"}