NSFileManager的简单实用

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

//    NSFileManager简单使用,文件管理类
//    1.创建对象 使用defaultManager类方法,创建单例对象(系统的单例还有NSUserDefaults, NSNotification, UIApplication,NSURLCache);

    NSFileManager *fileManger = [NSFileManager defaultManager];
    //创建文件夹,将要创建的/path1/path2/文件拼接到路径中
    //获取Documents路径
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentPath = [paths objectAtIndex:0];
    NSLog(@"path:%@", documentPath);

    NSString *newPath1 = [documentPath stringByAppendingPathComponent:@"path1"];

    [fileManger createDirectoryAtPath:newPath1 withIntermediateDirectories:YES attributes:nil error:nil];
    //创建文件夹里面的文件
    NSString *filePath1 = [newPath1 stringByAppendingPathComponent:@"text.txt"];

    BOOL file = [fileManger createFileAtPath:filePath1 contents:nil attributes:nil];

    if (file) {
        NSLog(@"文件创建成功");
    }else{
        NSLog(@"文件创建失败");
    }

    //往文件里面写入(也可以写入字典,数组等)
    NSString *strData = @"想要写入的东西";

    BOOL write = [strData writeToFile:filePath1 atomically:YES encoding:NSUTF8StringEncoding error:nil];

    if (write) {
        NSLog(@"写入成功");
    }else{
        NSLog(@"写入失败");
    }

    //判断文件是否存在
    if ([fileManger fileExistsAtPath:filePath1]) {

        NSLog(@"存在该文件");

    }else{
        NSLog(@"不存在该文件");
    }

    //删除文件
    BOOL delete = [fileManger removeItemAtPath:filePath1 error:nil];

    if (delete) {

        NSLog(@"文件删除成功");
    }else{
        NSLog(@"文件删除失败");
    }

}

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

@end