**0、判斷一個文件是否存在***,***傳入全路徑(fileExistsAtPath)** ~~~ // 創建文件管理器 NSFileManager * fileManager = [NSFileManager defaultManager]; NSString * documents = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)lastObject]; NSString * filePath = [documents stringByAppendingPathComponent:@"test"]; // 判斷一個文件是否存在,傳入全路徑 if ([fileManager fileExistsAtPath:filePath]) { NSLog(@"it is exit"); } ~~~ **1、在Documents里創建目錄** ~~~ NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; NSLog(@"documentsDirectory%@",documentsDirectory); NSFileManager *fileManager = [NSFileManager defaultManager]; NSString *testDirectory = [documentsDirectory stringByAppendingPathComponent:@"test"]; // 創建目錄 [fileManager createDirectoryAtPath:testDirectory withIntermediateDirectories:YES attributes:nil error:nil]; ~~~ 2、在目錄下創建文件 ~~~ NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test00.txt"]; NSString *testPath2 = [testDirectory stringByAppendingPathComponent:@"test22.txt"]; NSString *testPath3 = [testDirectory stringByAppendingPathComponent:@"test33.txt"]; NSString *string = @"寫入內容，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、獲取目錄列里所有文件名** 兩種方法獲取：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使用操作當前目錄** ~~~ //創建文件管理器 NSFileManager *fileManager = [NSFileManager defaultManager]; NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; //更改到待操作的目錄下 [fileManager changeCurrentDirectoryPath:[documentsDirectory stringByExpandingTildeInPath]]; //創建文件fileName文件名稱，contents文件的內容，如果開始沒有內容可以設置為nil，attributes文件的屬性，初始為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、刪除文件** ~~~ [fileManager removeItemAtPath:fileName error:nil]; ~~~