**0、判断一个文件是否存在***,***传入全路径(fileExistsAtPath)** ~~~ // 创建文件管理器 NSFileManager * fileManager = [NSFileManager defaultManager]; NSString * documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject]; NSString * filePath = [documents stringByAppendingPathComponent:@"test"]; // 判断一个文件是否存在,传入全路径 if ([fileManager fileExistsAtPath:filePath]) { NSLog(@"it is exit"); } ~~~ **1、在Documents里创建目录** ~~~ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSLog(@"documentsDirectory%@",documentsDirectory); NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *testDirectory = [documentsDirectory stringByAppendingPathComponent:@"test"]; // 创建目录 [fileManager createDirectoryAtPath:testDirectory withIntermediateDirectories:YES attributes:nil error:nil]; ~~~ 2、在目录下创建文件 ~~~ NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test00.txt"]; NSString *testPath2 = [testDirectory stringByAppendingPathComponent:@"test22.txt"]; NSString *testPath3 = [testDirectory stringByAppendingPathComponent:@"test33.txt"]; NSString *string = @"写入内容，write String"; [fileManager createFileAtPath:testPath contents:[string dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]; [fileManager createFileAtPath:testPath2 contents:[string dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]; [fileManager createFileAtPath:testPath3 contents:[string dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]; ~~~ **3、获取目录列里所有文件名** 两种方法获取：subpathsOfDirectoryAtPath 和subpathsAtPath ~~~ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSLog(@"documentsDirectory%@",documentsDirectory); NSFileManager *fileManage = [NSFileManager defaultManager]; NSString *myDirectory = [documentsDirectory stringByAppendingPathComponent:@"test"]; NSArray *file = [fileManage subpathsOfDirectoryAtPath: myDirectory error:nil]; NSLog(@"%@",file); NSArray *files = [fileManage subpathsAtPath: myDirectory ]; NSLog(@"%@",files); ~~~ **4、fileManager使用操作当前目录** ~~~ //创建文件管理器 NSFileManager *fileManager = [NSFileManager defaultManager]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; //更改到待操作的目录下 [fileManager changeCurrentDirectoryPath:[documentsDirectory stringByExpandingTildeInPath]]; //创建文件fileName文件名称，contents文件的内容，如果开始没有内容可以设置为nil，attributes文件的属性，初始为nil NSString * fileName = @"testFileNSFileManager.txt"; NSArray *array = [[NSArray alloc] initWithObjects:@"hello world",@"hello world1", @"hello world2",nil]; [fileManager createFileAtPath:fileName contents:array attributes:nil]; ~~~ **5、删除文件** ~~~ [fileManager removeItemAtPath:fileName error:nil]; ~~~