Hey Jnr, I don't know about imageshack, but I do know if you're on an iphone, the only way I can ever upload photo's is with tapatalk. (download app, I think it's 99cents?)
Otherwise, do what I do and just take the pic and wait until you're on the laptop or PC at home to upload? lol
Other members may have better ways though, I'm definitely not tech savvy, but it's the only way I know to upload pics through the iphone.