One of the not so well-known frameworks existing on iOS (and Mac OS), is the Event Kit framework. This framework has one purpose only, to let us access the calendars, the events and the reminders of a device, and work with them. If you have ever been wondered about how you can create custom events through your app, or how to set reminders without using the Reminders app, then the Event Kit is the answer you’re looking for. Through this tutorial, you will have the chance to meet it, as you’ll get to know the most important aspects of it.
Before we start working with it, I think it would be useful to mention a few facts about the Event Kit framework. What actually the framework does, is to provide access to the Calendar and Reminders apps, and make your own app capable of retrieving information, or adding new. Behind of both of these apps, there is the same database, named Calendar Database. What you can do with the framework is to create, edit and delete both events and reminders. Events are displayed in the Calendar app, while reminders are (obviously) displayed in the Reminders app. Further than that, you are given the ability to create or delete calendars, and furthermore, to perform more advanced tasks, such as settings alarms for an upcoming event or reminder, or making them recurring.
When using the Event Kit framework, you should always have in mind that the user must grant access to either Calendar or Reminders apps. Upon the first launch of an app that uses the framework, an alert view asking for the user consent must appear, and it’s up to users to decide whether your app will be able to work with any of the above resources. After all, asking for user permissions is something that always happen in cases of frameworks that deal with other apps or resources of the iOS. Therefore, you should check if user has granted access, and then make the related to Event Kit features available.
As always, I recommend you to go through the Apple documentation as well for getting a greater level of understanding on the topic. Having said all that, let’s move on to make our introduction to the sample app of this tutorial.