to allow access please respond on your iPhone - Broken screen

I dropped my iPhone 4 and shattered the top right of the screen. I wanted to back up to itunes today so I could put the backup on a separate iPhone 4 given to me by a family member. However, when I connect to iTunes I get a message after clicking allow to sync my photos that says to allow access please respond on your iphone. I cannot slide over and enter my passcode due to the screen becoming unresponsive after smashing it. I wouldnt mind but there is photos in there extremely high in sentimental value that I just CANNOT go without. Is there anyway to get past this problem.

Thanks for any help