What's an alternative way to delete photos off iPhone 4?

My iPhone's screen is cracked in the most convenient of places (right where the trash can symbol is when viewing photos on iPhones, in the bottom right hand corner), so I can't manually delete photos on my phone. Is there an alternative way, perhaps off my computer?

Connect your iPhone to your Laptop or PC or Mac, it will detect your iPhone and opens the camera folder.

just mark all and delete from your computer. "ctrl a, del"