1        NSFileManager*manager = [NSFileManagerdefaultManager];//单例模式 2   3         // 1.获取文件属性 4         NSString *path = @"/Users/hellovoidworld/desktop/oc/test20141121.txt"; 5         NSFileManager *manager = [NSFileManagerdefaultManager]; // 单例模式 6         NSDictionary *attrDic = [manager attributesOfItemAtPath:path error:nil]; 7         NSLog(@"attrDic: %@", attrDic); 8         9         // 2.获得目录下的文件与子文件目录列表10         NSString *dirPath = @"/Users/hellovoidworld/desktop/oc";11        12         // 只能获取到第一级目录的文件和文件夹（名字）13         NSArray *subDirArr = [manager contentsOfDirectoryAtPath:dirPath error:nil];14         NSLog(@"subDirArr: %@", subDirArr);15        16         // 包含所有文件、子目录（名字）17         NSArray *subPath = [manager subpathsAtPath:dirPath];18         NSLog(@"subPath: %@", subPath);19        20        21         // 3.管理目录22         // 创建目录23         [manager createDirectoryAtPath:@"/Users/hellovoidworld/desktop/oc/newFolder"withIntermediateDirectories:NOattributes:nilerror:nil];24         //withIntermediateDirectories 参数表示要不要创建不存在的所有目录，NO表示只能创建一级目录25        26         // 移动目录27         [manager moveItemAtPath:@"/Users/hellovoidworld/desktop/oc/newFolder/existedFolder"toPath:@"/Users/hellovoidworld/desktop/oc/newFolder/movedFolder"error:&error];28         // existedFolder会被剪切变成movedFolder，移动到指定位置29        30         // 删除目录31         [manager removeItemAtPath:@"/Users/hellovoidworld/desktop/oc/newFolder/deletingFolder"error:nil];32        33         // 拷贝文件34         [manager copyItemAtPath:@"/Users/hellovoidworld/desktop/oc/newFolder/copyingFolder"toPath:@"/Users/hellovoidworld/desktop/oc/newFolder/copiedFolder"error:nil];

 1 NSFileManager *fileManager = [NSFileManager defaultManager]; 2         3 //        // 1.获得文件 4         NSString *path = @"/Users/hellovoidworld/desktop/oc/M2.jpg"; 5         NSData *data = http://www.mamicode.com/[NSData dataWithContentsOfFile:path]; // 提取数据 6         NSLog(@"%ld", data.length); 7         8         NSString *path2 = @"/Users/hellovoidworld/desktop/oc/M2Copy.jpg"; 9         [fileManager createFileAtPath:path2 contents:data attributes:nil]; // 写入数据10        11         // 2.移动文件，相当于剪切操作12         NSString *fromPath = @"/Users/hellovoidworld/desktop/oc/M2Copy.jpg";13         NSString *toPath = @"/Users/hellovoidworld/desktop/oc/newFolder/M2.jpg";14         [fileManager moveItemAtPath:fromPath toPath:toPath error:nil];15        16         // 3.删除文件17         [fileManager removeItemAtPath:@"/Users/hellovoidworld/desktop/oc/newFolder/M2.jpg" error:nil];

 1 // NSData是一个不卡边长度的Data类型，可以一次性加载文件内容 2         NSData *data = http://www.mamicode.com/[NSData dataWithContentsOfFile:@"/Users/hellovoidworld/desktop/oc/newFolder/test.txt"]; 3         NSLog(@"data length = %ld", data.length); 4         5         // 利用NSData写入文件数据 6         [data writeToFile:@"/Users/hellovoidworld/desktop/oc/newFolder/test2.txt" atomically:YES]; 7   8         // NSMutableData 9         NSMutableData *muData =http://www.mamicode.com/ [[NSMutableData alloc] init];10        11         NSString *str1 = @"我要好好学习!";12         NSString *str2 = @"天天向上!";13         NSString *str3 = @"今天休息!";14        15         NSDate *data1 = [str1 dataUsingEncoding:NSUTF8StringEncoding];16         NSData *data2 = [str2 dataUsingEncoding:NSUTF8StringEncoding];17         NSData *data3 = [str3 dataUsingEncoding:NSUTF8StringEncoding];18        19         [muData appendData:data1];20         [muData appendData:data2];21         [muData appendData:data3];22        23         NSString *muPath = @"/Users/hellovoidworld/desktop/oc/newFolder/mu.txt";24         [muData writeToFile:muPath atomically:YES];