disabling certain services in UIDocumentController - iphone

Question

I have the following code to post photo to instagram:
NSArray *paths = NSSearchPathForDirectoriesInDomains( NSDocumentDirectory, NSUserDomainMask, YES);
NSString* homePath = [paths objectAtIndex:0];
NSString* basePath = #"integration/instagram";
NSString* tmpFileName = #"jumpto.ig";
NSString* dirPath = [NSString stringWithFormat:#"%#/%#", homePath, basePath];
NSString* docPath = [NSString stringWithFormat:#"%#/%#", dirPath, tmpFileName];
//clear it out and make it fresh
[[NSFileManager defaultManager] removeItemAtPath:docPath error:nil];
if ([[NSFileManager defaultManager] createDirectoryAtPath:dirPath withIntermediateDirectories:YES attributes:nil error:nil]) {
NSData* imgData = [self generateImageData:img];
[[NSFileManager defaultManager] createFileAtPath:docPath contents:imgData attributes:nil];
NSURL* url = [NSURL fileURLWithPath:docPath isDirectory:NO ];
NSURL *instagramURL = [NSURL URLWithString:#"instagram://camera"];
if ([[UIApplication sharedApplication] canOpenURL:instagramURL]) {
//imageToUpload is a file path with .ig file extension
self.documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:url];
self.documentInteractionController.UTI = #"com.instagram.exclusivegram";
self.documentInteractionController.delegate = self;
self.documentInteractionController.annotation = [NSDictionary dictionaryWithObject:#"Caption Test" forKey:#"InstagramCaption"];
[self.documentInteractionController presentOptionsMenuFromBarButtonItem:self.navigationItem.rightBarButtonItem animated:YES];
}
}
The issue is that when I open the popover, I see other services such as facebook/twitter/mail/print/assign to contact/copy/etc. How do I make it such that I only have one option which is Open in Instagram?

Answer 1

Instagram listens to both .jpg/.ig files as well as a special extension called .igo (Instagram Only). By changing the filename to .igo, only instagram should show up in the list:
NSString* tmpFileName = #"jumpto.igo";
Source: Instagram iPhone Hooks
Edit: I think there's a logical issue with how you're writing the file. Instead of using NSFileManager to write out the contents on this line:
[[NSFileManager defaultManager] createFileAtPath:docPath contents:imgData attributes:nil];
Try using the NSData object itself to write it into place:
[imgData writeToFile:docPath atomically:NO];
I'm not certain this will result in a different file, but I'm wondering if the way NSFileManager creates files with data is differently than how NSData writes the data directly.