iphone 文件系统 读写document中的文件

1利用FileManage来读取document的文件

NSFileManager *fileManager = [NSFileManager defaultManager];  

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

    NSString *documentsDirectory = [paths objectAtIndex:0];

NSError *error = nil;

NSArray *fileList = [[NSArray alloc] init];

fileList = [fileManager contentsOfDirectoryAtPath:documentsDirectory error:&error];

for (NSString *file in fileList) {

NSLog(@"fileName is :%@",file);

}