React native _reactNativeFetchBlob2.default.writeFile不是函数

TypeError:_reactNativeFetchBlob2.default.writeFile不是函数

import RNFetchBlob from 'react-native-fetch-blob';


RNFetchBlob.writeFile(path, data, 'utf8')
                .then((success) => {
                    console.log(success);
                })
                .catch((err) => {
                    console.log(err);
                });

我想你错过了fs。。。RNFetchBlob.fs.writeFile