NSFileManager 文件管理器

//
//  main.m
//  fileManager
//
//  Created by MAC on 15/12/26.
//  Copyright © 2015年 MAC. All rights reserved.
//

#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    @autoreleasepool {
        //实例化它自己  单例设计模式
        NSFileManager *fm = [NSFileManager defaultManager];
        
    //获得文件的目录 两个都是作用域
       NSArray *array =  [fm URLsForDirectory:NSDesktopDirectory inDomains:NSUserDomainMask];
        NSLog(@"%@",array);
        //判断文件是否存在
        NSString *filePath = @"/tmp/test.txt";
        BOOL r = [fm fileExistsAtPath:filePath];
        NSLog(@"%@",r==1?@"YES":@"NO");
        //在某个路径下创建一个文件
        NSString *filePath1 = @"/tmp/test100000.txt";
        NSString *content = @"hello world";
        NSData *data = [content dataUsingEncoding:NSUTF8StringEncoding];
     BOOL r1 =   [fm createFileAtPath:filePath1 contents:data attributes:nil];
       NSLog(@"%@",r1==1?@"YES":@"NO");
        //删除文件
       BOOL r2 = [fm removeItemAtPath:filePath1 error:nil];
        NSLog(@"%@",r2==1?@"YES":@"NO");
        //文件读写
        NSString *str = @"asdzxc";
        [str writeToFile:filePath1 atomically:YES encoding:NSUTF8StringEncoding error:nil];
        str = [NSString stringWithContentsOfFile:filePath1 encoding:NSUTF8StringEncoding error:nil];
        NSLog(@"%@",str);
        //拷贝文件 调用fm里的方法
         NSString *filePath2 = @"/tmp/test2.txt";
       BOOL r3= [fm copyItemAtPath:filePath1 toPath:filePath2 error:nil];
            NSLog(@"%@",r3==1?@"YES":@"NO");
        
        //重命名(移动)
       
        [fm moveItemAtPath:filePath2 toPath:filePath1 error:nil];
        //获得文件属性
        NSDictionary *dict=[fm attributesOfItemAtPath:filePath error:nil];
        for (NSString *key in dict) {
            NSString *value = [dict objectForKey:key];
            NSLog(@"%@,%@",key,value);
        }
        
        
        //- ----对目录的操作
        //创建目录
        NSString *dir = @"/tmp/wjr";
        BOOL r4=[fm createDirectoryAtPath:dir withIntermediateDirectories:YES attributes:nil error:nil];
        NSLog(@"%@",r4==1?@"YES":@"NO");
        //在桌面创建目录
      array = [fm URLsForDirectory:NSDesktopDirectory inDomains:NSUserDomainMask];
        
        if (array.count>0) {
            NSURL *url = [array objectAtIndex:0];
            NSLog(@"------%@",url);
            str = url.path;
            NSLog(@"%@",str);
            str = [str stringByAppendingString:@"/abc"];
             NSLog(@"%@",str);
            [fm createDirectoryAtPath:str withIntermediateDirectories:YES attributes:nil error:nil];
           
            
          NSLog(@"%@",r4==1?@"YES":@"NO");
        }
        //删除目录
        r4 = [fm removeItemAtPath:dir error:nil];
       NSLog(@"%@",r4==1?@"YES":@"NO");
        //获得当前文件目录路径
        str = fm.currentDirectoryPath;
        NSLog(@"%@",str);
        //目录的遍历
       NSString  *path  = @"/";
        array  = [fm contentsOfDirectoryAtPath:path error:nil];
        NSLog(@"%@",array);
        
        
        
        
        
    }
    return 0;
}