delete Files and Folders（删除文件、文件夹）

1。实现方法:

- (BOOL)removeItemAtPath:(NSString *)path error:(NSError **)error

e.g.

@property (nonatomic, strong) NSFileManager *fileManager;

/* 根据给定的路径创建文件夹 */

- (void) createFolder:(NSString *)paramPath{

    NSError *error = nil;

    if ([self.fileManager createDirectoryAtPath:paramPath  withIntermediateDirectories:YES

                                     attributes:nil error:&error] == NO){

        NSLog(@"Failed to create folder %@. Error = %@",  paramPath,  error);

    }

    else {

        NSLog(@"create folder:%@ in succeed",paramPath);

    }

}

/* 在指定的路径下创建文件（在指定的文件夹里创建文件） */

- (void) createFilesInFolder:(NSString *)paramPath{

    for (NSUInteger counter = 0; counter < 5; counter++){

        NSString *fileName = [NSString stringWithFormat:@"%lu.txt",  (unsigned long)counter+1];

        NSString *path = [paramPath stringByAppendingPathComponent:fileName];

        NSString *fileContents = [NSString stringWithFormat:@"Some text_%lu",(unsigned long)counter+1];

        NSError *error = nil;

        if ([fileContents writeToFile:path  atomically:YES

               encoding:NSUTF8StringEncoding  error:&error] == NO){

            NSLog(@"Failed to save file to %@. Error = %@", path, error);

        }

    }

    NSLog(@"create files in folder succeed");   

}

/* 遍历 */

- (void) enumerateFilesInFolder:(NSString *)paramPath{

    NSError *error = nil;

    NSArray *contents = [self.fileManager contentsOfDirectoryAtPath:paramPath  error:&error];  

    if ([contents count] > 0 && error == nil){

        NSLog(@"Contents of path %@ = \n%@", paramPath, contents);

    }

    else if ([contents count] == 0 &&  error == nil){

        NSLog(@"Contents of path %@ is empty!", paramPath);

    }

    else {

        NSLog(@"Failed to enumerate path %@. Error = %@", paramPath, error);

    }    

}

/* 删除 */

- (void) deleteFilesInFolder:(NSString *)paramPath{

    NSError *error = nil;

    NSArray *contents = [self.fileManager contentsOfDirectoryAtPath:paramPath error:&error];

    if (error == nil){

        for (NSString *fileName in contents){

            /*filePath:the full path */

            NSString *filePath = [paramPath stringByAppendingPathComponent:fileName];

            if ([self.fileManager removeItemAtPath:filePath error:&error] == NO){

                NSLog(@"Failed to remove item at path %@. Error = %@", fileName,  error);

            }

        }

    } else {

        NSLog(@"Failed to enumerate path %@. Error = %@", paramPath, error);

    }   

}

/* 删除文件夹*/

- (void) deleteFolder:(NSString *)paramPath{

    NSError *error = nil;

    if ([self.fileManager removeItemAtPath:paramPath error:&error] == NO){

        NSLog(@"Failed to remove path %@. Error = %@", paramPath, error);

    }else {

        NSLog(@"succeed in remove path %@",paramPath);

}

-(void) actionFilesAndFolders{

    self.fileManager = [[NSFileManager alloc] init];   

    NSString *txtFolder = [NSTemporaryDirectory() stringByAppendingPathComponent:@"txt"];

    

    [self createFolder:txtFolder];

    [self createFilesInFolder:txtFolder];

    [self enumerateFilesInFolder:txtFolder];

    [self deleteFilesInFolder:txtFolder];

    [self enumerateFilesInFolder:txtFolder];

    [self deleteFolder:txtFolder];

}