I'd like to allow users of my mobile website to upload a photo, enter a tag and caption in Mobile Safari, then open Instagram with that image, tag and caption pre-populated.
Based on this documentation, it's possible to pre-populate the image and tag, but the only mention of pre-populating a caption is "To include a pre-filled caption with your photo, you can set the annotation property on the document interaction request to an NSDictionary containing an NSString under the key "InstagramCaption."
Can I use a custom URL, something like: instagram://media?id=999&tag?name=sweet_tag&InstagramCaption?caption='My sweet caption.'
to pre-populate an image, tag and caption?