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@implementation ViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

    

    NSFileManager * fileManager = [NSFileManager defaultManager];

    NSString *currentPath = [fileManager currentDirectoryPath];

    

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

    NSString *documentPath = [dirPath objectAtIndex:0];

    NSLog(@"currentPath %@", currentPath);

    NSLog(@"documentPath %@", documentPath);

    

    if ([fileManager changeCurrentDirectoryPath:documentPath] == NO){

        // 폴더 이동 못함

    } else {

        // 폴더 이동함

        NSLog(@"폴더 이동");

    }

    

    char *bytes = "1234";

    NSData *data = [[NSData alloc]initWithBytes:bytes length:4];

    [fileManager createFileAtPath:@"test.txt" contents:data attributes:nil]; 

}