Check out Slash Keyboard, a free keyboard replacement for your iOS device. Slash "gives you quick access to the things you share every day like photos, places, music, GIFs, stickers, emoji and more." Users can access these things by typing the "\" key. It's designed in particular to work with social media apps like Apple's Messages, WhatsApp, Twitter, Messenger, Instagram, and Apple's Mail.
Check It Out: Slash Keyboard for iOS for Quick Sharing