NSFileManager

-(void)dirHome{  
    NSString *dirHome=NSHomeDirectory();      
    NSLog(@"app_home: %@",dirHome);  
} 

//获取Library目录  
-(void)dirLib{  
    //[NSHomeDirectory() stringByAppendingPathComponent:@"Library"];  
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);  
    NSString *libraryDirectory = [paths objectAtIndex:0];  
    NSLog(@"app_home_lib: %@",libraryDirectory);  
} 

//获取Cache目录  
-(void)dirCache{  
    NSArray *cacPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);  
    NSString *cachePath = [cacPath objectAtIndex:0];  
    NSLog(@"app_home_lib_cache: %@",cachePath);  
}

//获取Tmp目录  
-(void)dirTmp{  
    //[NSHomeDirectory() stringByAppendingPathComponent:@"tmp"];  
    NSString *tmpDirectory = NSTemporaryDirectory();  
    NSLog(@"app_home_tmp: %@",tmpDirectory);  
}  

//创建文件夹  
-(void *)createDir{  
    NSString *documentsPath =[self dirDoc];  
    NSFileManager *fileManager = [NSFileManager defaultManager];  
    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];  
    // 创建目录  
    BOOL res=[fileManager createDirectoryAtPath:testDirectory withIntermediateDirectories:YES attributes:nil error:nil];  
    if (res) {  
        NSLog(@"文件夹创建成功");  
    }else  
        NSLog(@"文件夹创建失败");  
 } 

//创建文件  
-(void *)createFile{  
    NSString *documentsPath =[self dirDoc];  
    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];  
    NSFileManager *fileManager = [NSFileManager defaultManager];  
    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];  
    BOOL res=[fileManager createFileAtPath:testPath contents:nil attributes:nil];  
    if (res) {  
        NSLog(@"文件创建成功: %@" ,testPath);  
    }else  
        NSLog(@"文件创建失败");  
}  

//写文件  
-(void)writeFile{  
    NSString *documentsPath =[self dirDoc];  
    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];  
    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];  
    NSString *content=@"测试写入内容！";  
    BOOL res=[content writeToFile:testPath atomically:YES encoding:NSUTF8StringEncoding error:nil];  
    if (res) {  
        NSLog(@"文件写入成功");  
    }else  
        NSLog(@"文件写入失败");  
} 

//读文件  
-(void)readFile{  
    NSString *documentsPath =[self dirDoc];  
    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];  
    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];  
//    NSData *data = [NSData dataWithContentsOfFile:testPath];  
//    NSLog(@"文件读取成功: %@",[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]);  
    NSString *content=[NSString stringWithContentsOfFile:testPath encoding:NSUTF8StringEncoding error:nil];  
    NSLog(@"文件读取成功: %@",content);  
}  

//文件属性  
-(void)fileAttriutes{  
    NSString *documentsPath =[self dirDoc];  
    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];  
    NSFileManager *fileManager = [NSFileManager defaultManager];  
    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];  
    NSDictionary *fileAttributes = [fileManager attributesOfItemAtPath:testPath error:nil];     
    NSArray *keys;  
    id key, value;  
    keys = [fileAttributes allKeys];  
    int count = [keys count];  
    for (int i = 0; i < count; i++)  
    {  
        key = [keys objectAtIndex: i];  
        value = [fileAttributes objectForKey: key];  
        NSLog (@"Key: %@ for value: %@", key, value);  
    }  
}  

//删除文件  
-(void)deleteFile{  
    NSString *documentsPath =[self dirDoc];  
    NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"test"];  
    NSFileManager *fileManager = [NSFileManager defaultManager];  
    NSString *testPath = [testDirectory stringByAppendingPathComponent:@"test.txt"];     
    BOOL res=[fileManager removeItemAtPath:testPath error:nil];  
    if (res) {  
        NSLog(@"文件删除成功");  
    }else  
        NSLog(@"文件删除失败");     
    NSLog(@"文件是否存在: %@",[fileManager isExecutableFileAtPath:testPath]?@"YES":@"NO");  
}