RNFS笔记

react-native-fs笔记
1.RNFS常用路径：

 MainBundlePath: RNFSManager.RNFSMainBundlePath,
  CachesDirectoryPath: RNFSManager.RNFSCachesDirectoryPath,
  DocumentDirectoryPath: RNFSManager.RNFSDocumentDirectoryPath,
  ExternalDirectoryPath: RNFSManager.RNFSExternalDirectoryPath,
  ExternalStorageDirectoryPath: RNFSManager.RNFSExternalStorageDirectoryPath,
  TemporaryDirectoryPath: RNFSManager.RNFSTemporaryDirectoryPath,
  LibraryDirectoryPath: RNFSManager.RNFSLibraryDirectoryPath,
  PicturesDirectoryPath: RNFSManager.RNFSPicturesDirectoryPath

对应iOS下路径示例：
 "/Users/gaojie/Library/Developer/CoreSimulator/Devices/7A7897A7-7A1E-4D3B-8B43-9DFD99438B18/data/Containers/Data/Application/65FB693B-483C-4582-99AA-2B27FEB76530/Library/Caches",
    "/Users/gaojie/Library/Developer/CoreSimulator/Devices/7A7897A7-7A1E-4D3B-8B43-9DFD99438B18/data/Containers/Data/Application/65FB693B-483C-4582-99AA-2B27FEB76530/Documents",
    null,
    null,
    "/Users/gaojie/Library/Developer/CoreSimulator/Devices/7A7897A7-7A1E-4D3B-8B43-9DFD99438B18/data/Containers/Data/Application/65FB693B-483C-4582-99AA-2B27FEB76530/tmp/",
    "/Users/gaojie/Library/Developer/CoreSimulator/Devices/7A7897A7-7A1E-4D3B-8B43-9DFD99438B18/data/Containers/Data/Application/65FB693B-483C-4582-99AA-2B27FEB76530/Library",
    null

使用举例（安卓）

let imgName = uuidOutLine+'.png';
                let dirPath = this.config.deliveryCheckHousePath;
                let imgPath = dirPath+'/'+imgName;
                //1.检查目标文件夹是否存在
                RNFS.exists(dirPath).then((result) => {
                    this.log('exist:'+result);
                    if (result) {
                        //3.图片迁移
                        RNFS.copyFile(uri, imgPath).then((result) => {
                            console.log(dirPath)
                            console.log('copyFile:'+result);
                        })
                    } else {
                        //2.新建文件夹
                        RNFS.mkdir(dirPath).then((result)=>{
                            this.log('mkdir:'+result);
                            //3.图片迁移
                            RNFS.copyFile(uri, imgPath).then((result) => {
                                console.log('copyFile:'+result)
                            })
                        })
                    }
                })