create folder inside nsoperation failed - nsoperation

Question

I use this method inside an NSOperation for check and create a folder:
- (void) checkAndCreateFolderWithPath:(NSString *)path {
NSFileManager *fileManager = [NSFileManager defaultManager];
NSString *pathDaControllare = [[self getLibraryPath] stringByAppendingPathComponent:path];
NSError *error = nil;
BOOL isDir;
BOOL exists = [fileManager fileExistsAtPath:pathDaControllare isDirectory:&isDir];
if (exists) {
if (isDir) {
}
}
else {
[fileManager createDirectoryAtPath:pathDaControllare
withIntermediateDirectories:YES
attributes:nil
error:&error];
NSLog(#"%#",error);
}
}
Using NSOperation I get this error:
Error Domain=NSCocoaErrorDomain Code=512 "The operation couldn’t be completed.
if I don't use NSOperation all work perfectly, this is the nsoperation
- (void) main {
NSString *filePath = [fileDict objectForKey:#"url"];
NSString *urlStr = [NSString stringWithFormat:#"http://www.allmyapp.net/wp-content/iFormulario_Update/%#",filePath];
urlStr = [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURLRequest *urlRequest = [NSURLRequest requestWithURL:[NSURL URLWithString:urlStr]];
[NSURLConnection sendAsynchronousRequest:urlRequest
queue:[[NSOperationQueue alloc] init]
completionHandler:^(NSURLResponse *response, NSData *data, NSError *error){
if (data) {
NSString *folderPath = [filePath stringByReplacingOccurrencesOfString:[filePath lastPathComponent] withString:#""];
[self checkAndCreateFolderWithPath:folderPath];
NSString *pathFile = [[self getLibraryPath] stringByAppendingString:filePath];
[data writeToFile:pathFile atomically:YES];
[self addSkipBackupAttributeToItemAtURL:[NSURL URLWithString:pathFile]];
[[NSNotificationCenter defaultCenter] postNotificationName:#"endFile" object:nil];
[self willChangeValueForKey:#"isFinished"];
[self willChangeValueForKey:#"isExecuting"];
isExecuting = NO;
isFinished = YES;
[self didChangeValueForKey:#"isExecuting"];
[self didChangeValueForKey:#"isFinished"];
}
}];
}
And this the method for create the queue:
for (NSDictionary *dict in fileDaScaricare) {
DownloadOperation *downloadOperation = [[DownloadOperation alloc] initWithDictionary:dict];
[self.operationQueue addOperation:downloadOperation];
}

Answer 1

You can try something like this:
NSString *stringPath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES)objectAtIndex:0]stringByAppendingPathComponent:#"/MyFolder"];
NSError *error = nil;
if (![[NSFileManager defaultManager] fileExistsAtPath:stringPath])
[[NSFileManager defaultManager] createDirectoryAtPath:stringPath withIntermediateDirectories:NO attributes:nil error:&error];
NSString *docFolderPath = [stringPath stringByAppendingString:[NSString stringWithFormat: #"/%#", self.downloadedFilename]];
[data writeToFile:docFolderPath atomically:YES];
It worked for me, and I am able to download a file in MyFolder. Hope it works for you. Please let me know if it works.