对本地文件的管理

//1.获取沙盒路径    NSString *path=[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, 1, YES)lastObject];    //2.拼接文件夹路径    NSString *docPath=[path stringByAppendingPathComponent:@"dengdeng"];    NSFileManager *manager=[NSFileManager defaultManager];    //3.创建文件夹    [manager createDirectoryAtPath:docPath withIntermediateDirectories:YES attributes:nil error:nil];    NSLog(@"%@",NSHomeDirectory());    //在新建的文件夹中写内容    NSString *strPath=[docPath stringByAppendingPathComponent:@"str.txt"];    NSString *str=@"11111111";    [str writeToFile:strPath atomically:YES encoding:NSUTF8StringEncoding error:nil];//    //判断文件夹是否已经创建过了//    BOOL result=[manager fileExistsAtPath:docPath];//    NSLog(@"%ld",result);    //删除    BOOL result=[manager removeItemAtPath:docPath error:nil];