You can type it in Xcode as a font style, or you can modify them in your favored graphic modifying software to develop the ideal images. I have utilized it in my individual site, and my apps to show you how beneficial it is.
Font Family: Flaticons
Tags: calendar, camera, dingbats, document, flat, folder, graphic, icon, logo, mail, photo, pictogram, picture, settings, social, symbol, web icons