CVCalendar
A custom visual calendar for iOS 8+ written in Swift
...There are two actual ways of implementing it in your project, storyboard setup, and manual setup. Since 1.1.1 version CVCalendar requires the implementation of two protocols CVCalendarViewDelegate and CVCalendarMenuViewDelegate, please implement both. Also note, they both have a method with the same signature which means you need to implement it only once. Two views are representing ultimately a MenuView and a CalendarView so they should have corresponding classes. To change their classes go to Identity Inspector and set custom classes.