Instagram Video iPhone Hook

Question

The current best solution:

https://stackoverflow.com/a/21888830/1786820

I am trying to do one better, by opening the Instagram app with a preselected video f

Answer 1

I came up with the idea to allow my app to accept the instagram:// URL schema. The hook from Flipagram opened up in my app as the following:

instagram://library?AssetPath=assets-library%3A%2F%2Fasset%2Fasset.mp4%3Fid%3D8864C466-A45C-4C48-B76F-E3C421711E9D%26ext%3Dmp4&InstagramCaption=Some%20Preloaded%20Caption

The undocumented iPhone hook that allows you to automatically select assets from the iPhones photo roll, and preload a caption for the video. This should give you the same user experience that Flipagrams app has with sharing a video to Instagram.

NSURL *videoFilePath = ...; // Your local path to the video
NSString *caption = @"Some Preloaded Caption";
ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
[library writeVideoAtPathToSavedPhotosAlbum:[NSURL URLWithString:videoFilePath] completionBlock:^(NSURL *assetURL, NSError *error) {
    NSURL *instagramURL = [NSURL URLWithString:[NSString stringWithFormat:@"instagram://library?AssetPath=%@&InstagramCaption=%@",[assetURL absoluteString].percentEscape,caption.percentEscape]];
    if ([[UIApplication sharedApplication] canOpenURL:instagramURL]) {
        [[UIApplication sharedApplication] openURL:instagramURL];
    }
}];

Works great!

Update: Instagram has removed the ability to pass the caption to their app. The best solution now it to just copy the desired caption to the paste board.

Answer 2

The answer is that it is not pulling the video from the camera roll at all, it might just look like it is.

Documentation here: http://instagram.com/developer/mobile-sharing/iphone-hooks/

The relevant bit is the bottom section "Document Interaction".

You would do this by doing something like this:

NSString *filePath = [NSTemporaryDirectory() stringByAppendingPathComponent:@"instagram.igo"];
NSData *data = // set this yourself

NSError *error = nil;
if (! [data writeToFile:filePath options:NSDataWritingAtomic error:&error])
{
    // error here
}

self.documentInteractionController = [UIDocumentInteractionController interactionControllerWithURL:[NSURL fileURLWithPath:filePath]];
self.documentInteractionController.delegate = self;
self.documentInteractionController.UTI = @"com.instagram.exclusivegram";
self.documentInteractionController.annotation = @{ @"InstagramCaption" : @"caption text here" };
const BOOL couldOpen = [self.documentInteractionController presentOpenInMenuFromRect:CGRectZero inView:myView animated:YES];

Set the data, the caption, and the view to present from yourself. Notice the UIDocumentInteractionController is also a property. It should be retained somewhere and not just a local variable in a method because it needs to exist outside of that scope when the method completes.