RN从IOS中的URL获取blob下载docx或pdf

Question

做了什么：

在 Android 中实现，并在 Android 中的特定 DCIM directory 中下载。 在 ios 中使用DocumentDir 下载 pdf 或 docx 文件。使用"rn-fetch-blob": "^0.12.0";

错误：

在 IOS 中，它在控制台中显示消息：

文件保存到 /var/mobile/Containers/Data/Application/E6FDC2DD-7FCA-44DC-85C4-A275078F8825/Documents/wow13.pdf

要下载的代码是这样的：

downloadFileOnSuccess = async () => {
    let dirs =
      Platform.OS == 'ios'
        ? RNFetchBlob.fs.dirs.DocumentDir
        : RNFetchBlob.fs.dirs.DCIMDir;
    console.log(dirs, 'document path');
    RNFetchBlob.config({
      // response data will be saved to this path if it has access right.

      fileCache: true,
      path: dirs + `/wow13.pdf`,
    })
      .fetch(
        'GET',
        'https://www.w3.org/WAI/ER/tests/xhtml/testfiles/resources/pdf/dummy.pdf',
        {
          //some headers ..
        },
      )
      .then(res => {
        // the path should be dirs.DocumentDir + 'path-to-file.anything'
        console.log('The file saved to ', res.path());
      });
  };

但我无法在我的 iphone 7 真实设备中找到文件的下载位置。我在IOS中缺少任何权限吗？ Havent为IOS添加了任何权限。

Answer 1

感谢pruthvi，我得到了答案，对于ios我需要提示用户：

.then(resp => {
      if (Platform.OS === "ios") {
        RNFetchBlob.ios.openDocument(resp.data);
      }
    })

希望对大家有帮助

Answer 2

最新的工作解决方案：

const actualDownload = () => {
        const { dirs } = RNFetchBlob.fs;
        const dirToSave = Platform.OS == 'ios' ? dirs.DocumentDir : dirs.DownloadDir
        const configfb = {
            fileCache: true,
            useDownloadManager: true,
            notification: true,
            mediaScannable: true,
            title: pdfInfo.pdf,
            path: `${dirToSave}/${pdfInfo.pdf}`,
        }
        const configOptions = Platform.select({
            ios: {
                fileCache: configfb.fileCache,
                title: configfb.title,
                path: configfb.path,
                appendExt: 'pdf',
            },
            android: configfb,
        });
    
        console.log('The file saved to 23233', configfb, dirs);
    
        RNFetchBlob.config(configOptions)
            .fetch('GET', `https://aquatherm.s3.ap-south-1.amazonaws.com/pdfs/${pdfInfo.pdf}`, {})
            .then((res) => {
                if (Platform.OS === "ios") {
                    RNFetchBlob.fs.writeFile(configfb.path, res.data, 'base64');
                    RNFetchBlob.ios.previewDocument(configfb.path);
                }
                setisdownloaded(false)
                if (Platform.OS == 'android') {
                    showSnackbar('File downloaded');
                }
                console.log('The file saved to ', res);
            })
            .catch((e) => {
                setisdownloaded(true)
                showSnackbar(e.message);
                console.log('The file saved to ERROR', e.message)
            });
    }

Answer 3

即兴创作 Ajmall Hasan 的回答。 我必须将 ${pdfInfo.pdf} 更改为 ${'pdfInfo.pdf'} 才能使其工作

const actualDownload = () => {
        const { dirs } = RNFetchBlob.fs;
        const dirToSave = Platform.OS == 'ios' ? dirs.DocumentDir : dirs.DownloadDir
        const configfb = {
            fileCache: true,
            useDownloadManager: true,
            notification: true,
            mediaScannable: true,
            title: pdfInfo.pdf,
            path: `${dirToSave}/${'pdfInfo.pdf'}`,
        }
        const configOptions = Platform.select({
            ios: {
                fileCache: configfb.fileCache,
                title: configfb.title,
                path: configfb.path,
                appendExt: 'pdf',
            },
            android: configfb,
        });
    
        console.log('The file saved to ', configfb, dirs);
    
        RNFetchBlob.config(configOptions)
            .fetch('GET', `https://aquatherm.s3.ap-south-1.amazonaws.com/pdfs/${'pdfInfo.pdf'}`, {})
            .then((res) => {
                if (Platform.OS === "ios") {
                    RNFetchBlob.fs.writeFile(configfb.path, res.data, 'base64');
                    RNFetchBlob.ios.previewDocument(configfb.path);
                }
                if (Platform.OS == 'android') {
                    showSnackbar('File downloaded');
                }
                console.log('The file saved to ', res);
            })
            .catch((e) => {
                showSnackbar(e.message);
                console.log('The file saved to ERROR', e.message)
            });
    }

Answer 4

 GetItem_downloadbtn = (item, itemname) => {
var pdfInfo = itemname;
const { dirs } = RNFetchBlob.fs;
const dirToSave = Platform.OS == 'ios' ? dirs.DocumentDir : dirs.DownloadDir
const configfb = {
    fileCache: true,
    useDownloadManager: true,
    notification: true,
    mediaScannable: true,
    title: pdfInfo.pdf,
    path: `${dirToSave}/${itemname}`,
}
const configOptions = Platform.select({
    ios: {
        fileCache: configfb.fileCache,
        title: configfb.title,
        path: configfb.path,
        appendExt: 'pdf',
    },
    android: configfb,
});
console.log('The file saved to 23233', configfb, dirs);

RNFetchBlob.config(configOptions)
    .fetch('GET', item, {})
    .then((res) => {
        if (Platform.OS === "ios") {
            RNFetchBlob.fs.writeFile(configfb.path, res.data, 'base64');
            RNFetchBlob.ios.previewDocument(configfb.path);
        }
        setisdownloaded(false)
        if (Platform.OS == 'android') {
            showSnackbar('File downloaded');
        }
        console.log('The file saved to ', res);
    })
    .catch((e) => {
        setisdownloaded(true)
        showSnackbar(e.message);
        console.log('The file saved to ERROR', e.message)
    });

}