HorizonCalendar

A declarative and performant iOS calendar UI component that supports use cases ranging from simple date pickers all the way up to fully-featured calendar apps.
1,795
By Bryan Keller

HorizonCalendar is UIKit library for displaying a range of dates in a vertically-scrolling or horizontally-scrolling calendar component. Its declarative API makes updating the calendar straightforward, while also providing many customization points to support a diverse set of designs and use cases.

Features:

  • Supports all calendars from Foundation.Calendar (Gregorian, Japanese, Hebrew, etc.)
  • Display months in a vertically-scrolling or horizontally-scrolling layout
  • Declarative API that enables unidirectional data flow for updating the content of the calendar
  • A custom layout system that enables virtually infinite date ranges without increasing memory usage
  • Pagination for horizontally-scrolling calendars
  • Specify custom views for individual days, month headers, and days of the week
  • Specify custom views to highlight date ranges
  • Specify custom views to overlay parts of the calendar, enabling features like tooltips
  • A day selection handler to monitor when a day is tapped
  • Customizable layout metrics
  • Pin the days-of-the-week row to the top
  • Show partial boundary months (exactly 2020-03-14 to 2020-04-20, for example)
  • Scroll to arbitrary dates and months, with or without animation
  • Robust accessibility support
  • Inset the content without affecting the scrollable region using UIView layout margins
  • Separator below the days-of-the-week row
  • Right-to-left layout support

HorizonCalendar serves as the foundation for the date pickers and calendars used in Airbnb's highest trafficked flows:

Search Stays Availability Calendar Wish List Experience Reservation Experience Host Calendar Management
Search Stay Availability Calendar Wish List Experience Reservation Experience Host Calendar Management
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