（iOS开发）本地文件夹的创建

1、首先，先获取沙盒目录

//获取Documents目录

-(NSString *)dirDoc{

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

NSString *documentsDirectory = [paths objectAtIndex:0];

// NSLog(@"app_home_doc: %@",documentsDirectory);

return documentsDirectory;

}
2、获取文件路径
NSString *documentsPath =[self dirDoc];

NSFileManager * fileManager =[NSFileManager defaultManager];
//文件夹picture
NSString *testDirectory = [documentsPath stringByAppendingPathComponent:@"picture"];

int inputname=[[[NSUserDefaults standardUserDefaults]valueForKey:myInputName] intValue];
//文件夹picture下的学号inputname文件夹
NSString * fileWithstudentNumber =[testDirectory stringByAppendingString:[NSString stringWithFormat:@"/%d",inputname]];

NSString *myfilePath = [NSString stringWithFormat:@"%@/%d.archive",fileWithstudentNumber,currentTitleCount];
3、创建
//判断文件夹是否存在，不存在就创建
BOOL isDic;

if(![fileManager fileExistsAtPath:testDirectory isDirectory:&isDic]||(!isDic))

{

[fileManager createDirectoryAtPath:testDirectory withIntermediateDirectories:YES attributes:nil error:nil];

}

BOOL res;

if(![fileManager fileExistsAtPath:fileWithstudentNumber isDirectory:&res]||(!res))

{

[fileManager createDirectoryAtPath:fileWithstudentNumber withIntermediateDirectories:YES attributes:nil error:nil];

}