[Obj-C] NSFileManager

//
//  KHTNViewController.m
//  NSFileManager Sample
//
//  Created by Dino Phan on 6/18/14.
//  Copyright (c) 2014 Dino Phan. All rights reserved.
//

#import "KHTNViewController.h"

@interface KHTNViewController ()

@property (strong, nonatomic) NSFileManager *fileManager;
@property (strong, nonatomic) NSString *stringPath;
@property (strong, nonatomic) NSString *contentOfFile;

@end

@implementation KHTNViewController
@synthesize fileManager, stringPath, contentOfFile;

- (void)viewDidLoad
{
    [super viewDidLoad];

    fileManager = [NSFileManager defaultManager];
    stringPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
    contentOfFile = @"Hello World!";
    NSString *pathOfFile = [stringPath stringByAppendingPathComponent:@"data.txt"];
    NSError *error = [[NSError alloc] init];

    // Create a file
    if ([contentOfFile writeToFile:pathOfFile atomically:YES encoding:NSUTF8StringEncoding error:&error]) {
        NSLog(@"'%@' has successfully wrote!", pathOfFile);
    } else {
        NSLog(@"Error: %@", [error debugDescription]);
    }

    // Read content in file
    NSString *getContent = [[NSString alloc] initWithContentsOfFile:pathOfFile encoding:NSUTF8StringEncoding error:nil];
    NSLog(@"%@", getContent);

    // Remove a file from Document dir
    if ([fileManager removeItemAtPath:pathOfFile error:&error]) {
        NSLog(@"'%@' removed!", pathOfFile);
    } else {
        NSLog(@"Error: %@", [error debugDescription]);
    }

    // Get boolean if file exist in documents folder
    if ([fileManager fileExistsAtPath:pathOfFile]) {
        NSLog(@"File exist!");
    } else {
        NSLog(@"File isn't exist!");
    }

    // List files in root
    NSArray *fileListAtRoot = [fileManager contentsOfDirectoryAtPath:[NSHomeDirectory() stringByAppendingPathComponent:@""] error:nil];
    NSString *fileNameInList = [[NSString alloc] init];

    for (fileNameInList in fileListAtRoot) {
        NSLog(@"%@", fileNameInList);
    }

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end