Working with Resources Directory in XCode and Document Directory in iPhone

1. Copy File from Resources folder to Document Directory

    NSArray  *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

    NSString *documentsDirectory = [paths objectAtIndex:0];

        // Copy eCommerce.sqlite3 from resources to the Documents folder

    NSString *storePath = [documentsDirectory stringByAppendingPathComponent: @"eCommerce.sqlite3"];

    NSString *filePath = [[NSBundle mainBundle] pathForResource:@"eCommerce" ofType:@"sqlite3"];

    if (filePath) {

        NSData *myData = [NSData dataWithContentsOfFile:filePath];

        if (![myData writeToFile:storePath atomically:YES]) {

            [self handleError:@"Critical file creation on the disk failed unexpectedly! Please leave the application as this is unrecoverable.!"];

        }

    }else {

        [self handleError:@"there is no database in Resources Folder!"];

    }

  

      2.  Check whether Existing file is there or not in Document directory

    NSString *getDatabasePath = [documentsDirectory stringByAppendingString:@"/eCommerce.sqlite3"];

   

    NSFileManager* fileManager = [NSFileManager defaultManager];

    if(![fileManager fileExistsAtPath:getDatabasePath])  {

        NSLog(@"file doesn't exist");

            // file doesn't exist

    } else {

         NSLog(@"file exist");

    }

      3. Create a Folder in side Document directory

- (void)createFolder:(NSString*)folderName

{

    NSString *storePath = [self.documentsDirectory stringByAppendingPathComponent:folderName];

    NSFileManager *NSFm= [NSFileManager defaultManager];

//        if(![NSFm createDirectoryAtPath:storePath attributes:nil])

//            [self handleError:@"Critical file creation on the disk failed unexpectedly! Please leave the application as this is unrecoverable.!"];

    if(![NSFm createDirectoryAtPath:storePath withIntermediateDirectories:YES attributes:nil error:NULL])

        [self handleError:@"Critical file creation on the disk failed unexpectedly! Please leave the application as this is unrecoverable.!"];

   

}

 

      4. Delete a file in side Document directory

    NSFileManager *fm = [NSFileManager defaultManager];     // delete zip file

            [fm removeItemAtPath:storePath error:nil];

            [fm removeItemAtPath:[documentsDirectory stringByAppendingPathComponent: @"__MACOSX"] error:nil];