NSFileManager

 

    

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

    NSString *documentPath = [pathArray firstObject];

    

    NSString *filePath = [documentPath stringByAppendingPathComponent:@"test.txt"];

    

    

    // 文件属性 -------------------------

    NSFileManager *fileManager = [NSFileManager defaultManager];

    BOOL flag = [fileManager isWritableFileAtPath:filePath];

    flag = [fileManager isReadableFileAtPath:filePath];

    flag = [fileManager isDeletableFileAtPath:filePath];

    flag = [fileManager isExecutableFileAtPath:filePath];

    NSArray *componentsArray = [fileManager componentsToDisplayForPath:filePath];

    NSLog(@"array = %@", componentsArray);

    NSData *data = [fileManager contentsAtPath:filePath];

    NSString *str = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];

    NSLog(@"str = %@", str);

    NSLog(@"flag = %i", flag);

    

    //创建目录、创建文件、拷贝文件、删除文件 -------------------------

    NSString *dir = [documentPath stringByAppendingPathComponent:@"a/b"];

    BOOL exists = [fileManager fileExistsAtPath:dir];

    if(!exists)

    {

        [fileManager createDirectoryAtPath:dir withIntermediateDirectories:YES attributes:nil error:nil];

    }

    

    // 创建文件

    NSString *ffilePath = [dir stringByAppendingPathComponent:@"test.txt"];

    if(![fileManager fileExistsAtPath:ffilePath isDirectory:NO])

    {

        [fileManager createFileAtPath:ffilePath contents:data attributes:nil];

    }

    NSLog(@"ffilepath = %@", ffilePath);

    // 拷贝文件

    NSString *dictFilePath = [[ffilePath stringByDeletingLastPathComponent] stringByAppendingPathComponent:@"test_copy.txt"];

    [fileManager copyItemAtPath:ffilePath toPath:dictFilePath error:nil];

    // 删除文件

    [fileManager removeItemAtPath:ffilePath error:nil];

    

    // 获取指定目录下的文件和文件夹

    // 1.contentsOfDirectoryAtPath 只遍历当前目录下的，子目录下的文件不遍历

    NSArray *dirArray = [fileManager contentsOfDirectoryAtPath:documentPath error:nil];

    NSLog(@"dirArray = %@", dirArray);

    

    // 2 enumeratorAtPath 获取目录下的所有文件，包括所有子目录

    NSDirectoryEnumerator *dirEnum = [fileManager enumeratorAtPath:documentPath];

    NSMutableArray *dirArray2 = [[NSMutableArray alloc]initWithCapacity:1];

    while ([dirEnum nextObject])

    {

        [dirArray2 addObject:[dirEnum nextObject]];

    }

    NSLog(@"dirArray2 = %@", dirArray2);