在React Native中，如何将base64图像转换为jpg，然后保存到临时路径?

问题描述：

在 react-native 中，在 react-native-fetch-blob 的帮助下，将图像转换为 BASE64 格式很容易.，我只是这样做:

In react-native, converting an image to BASE64 format is easy, with a little help of react-native-fetch-blob, I simply do:

RNFetchBlob.fs.readFile(filePath, 'base64')
    .then((data) => console.log(data));

但是，反过来呢?我知道有一些软件包可以做到这一点，但我想知道是否有可能仅使用 react-native-fetch-blob 或 react-native-fs ?

But, what about the other way around? I know there are some packages out there that does it, but I wonder if it's possible to do it with only react-native-fetch-blob or react-native-fs?

我想要的是将 BASE64 图像转换并保存到文件后，我能够像这样显示它:

What I want is that after converting and saving the BASE64 image to a file, I am able to display it like this:

<Image
    source={{ uri: <path/to/converted/image> }}
    style={{ ... }}
/>

答

原来，这并不是一件棘手的事情，假设我有一个 BASE64 图像，如果我想将其转换为JPG ，只需像这样使用 react-native-fs :

Turns out it's not tricky at all, suppose I have a BASE64 image, if I want to convert it to a JPG, just use react-native-fs like so:

import RNFS from 'react-native-fs';

const imageDate = '<some base64 data>';
const imagePath = `${RNFS.TemporaryDirectoryPath}image.jpg`;

RNFS.writeFile(imagePath, imageData, 'base64')
    .then(() => console.log('Image converted to jpg and saved at ' + imagePath));

仅此而已

在React Native中，如何将base64图像转换为jpg，然后保存到临时路径?

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